Maintenance Tips On Cars. - Car Talk (549) - Nairaland
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| Re: Maintenance Tips On Cars. by temi4fash(m): 1:39pm On May 19 |
Hello All, Please i need help with my Honda Civic 2008, Some times in the morning when we start the vehicle and engage the gear, it have this very rough jerking, and when this happens during movement you would notice a bit of jerking when the gears are changing. However, once movement have being made for like 10 mins thereabout and the engine is restarted, everything go smoothly. No jerking, change between gears is very smooth. We have scanned it and there are no codes. The oil is well guaged.. its a on and off thing.. Maybe once or twice in a week. Please help |
| Re: Maintenance Tips On Cars. by luvlyoracle(m): 8:04am On May 20 |
Louiscars:Thank so much. What about a crv? |
| Re: Maintenance Tips On Cars. by Louiscars: 10:09pm On May 20 |
luvlyoracle:the 2008-2010 Crv is a very good option also, Infact with 8m you’d get a solid toks standard unit while for Tokunbo from average price listing of this car you’d spend 10.2m ( you’d actually see cheaper options Infact some close to your budget but please be wary of Rust most especially on Canadian ones, they’re pretty common, confirm duty on the car is paid and also confirm drivetrain ) if you don’t mind I can help you get a good unit that checks all the boxes. |
| Re: Maintenance Tips On Cars. by RyanAutomotive: 9:44am On May 21 |
temi4fash:Good morning sir. Vehicle: Honda Civic 2008 (Automatic) Concern: Intermittent rough jerking during cold start and gear engagement, especially in the morning Let’s address this properly before unnecessary gearbox replacement or random repairs begin. * Professional Diagnostic Insight From your explanation: • Jerking happens mostly during cold start • Vehicle jerks when shifted into gear • Gear changes also become rough during movement • After about 10 minutes of driving and restart, everything becomes smooth again • No fault codes stored • Transmission fluid level is okay • Problem is intermittent (once or twice weekly) This is a very important pattern. The fact that the issue: • Happens mainly when cold • Disappears once the vehicle warms up …strongly suggests a cold-condition hydraulic or electronic control issue, not necessarily a completely damaged transmission. * Important Observation Many people assume: “No code = no problem.” But in transmission diagnosis, that is not always true. A transmission can still have: • Pressure irregularities • Solenoid sticking • Valve body wear • Or weak mounts …without immediately triggering fault codes. * Most Likely Causes (Based on Your Symptoms) 1. Transmission Fluid Condition / Hydraulic Delay Even if fluid level is correct: • Old or degraded ATF can lose cold-flow performance • Hydraulic pressure becomes unstable during morning startup This can cause: • Harsh engagement • Jerking during shifts • Delayed pressure response 2. Valve Body or Solenoid Sticking (Very Common on Cold Start) When the transmission is cold: • Solenoids may respond slowly • Valves may stick temporarily Once warm: Fluid flows better and operation becomes smooth again. ⸻ 3. Weak Engine or Transmission Mounts Mounts can exaggerate jerking sensation, especially: • During gear engagement • During cold idle vibration Even if the gearbox itself is not severely damaged. 4. Early Torque Converter or Pressure Regulation Issue Possible if: • RPM fluctuates during shift • Jerking feels heavy during acceleration * What Should Be Checked Now Before replacing any gearbox components: 1. Inspect Transmission Fluid Condition Check for: • Burnt smell • Dark coloration • Incorrect fluid type 2. Perform Cold-Start Live Data Scan This is very important. Monitor: • Shift timing • Solenoid operation • Transmission temperature • Line pressure behavior 3. Inspect Engine & Transmission Mounts Especially if: • Jerking feels excessive physically 4. Check for Pending Transmission Codes Some faults may remain in: • Pending status • History memory without triggering dashboard lights. * Do NOT Do This • Do NOT rush into gearbox replacement • Do NOT keep resetting ECU repeatedly • Do NOT allow random “gear calibration” without diagnosis • Do NOT ignore the issue because it disappears later • Professional Insight Your transmission is showing signs of: Cold-condition pressure or control instability. The good news is: Since the vehicle becomes smooth after warming up, this may still be at an early stage. Early diagnosis can prevent: • Valve body damage • Clutch wear • Full transmission failure later. * Ryan Automotive Limited Recommendation The correct next step is a structured cold-start transmission diagnosis, focusing on: • Live data analysis during morning startup • Solenoid response evaluation • Transmission fluid condition • Mount inspection • Hydraulic pressure behavior At Ryan Automotive Limited, we carry out professional transmission diagnostics and fault tracing to accurately identify intermittent issues like this instead of relying on guesswork or unnecessary part replacement. If diagnosed early, the repair is usually far cheaper than waiting for complete gearbox failure. Precision • Transparency • Excellence Ryan Automotive Limited 1 Like |
| Re: Maintenance Tips On Cars. by jceesquare(m): 1:47am On May 22 |
temi4fash:Check the filter if it's clogged. Replace it if you've never done that before. |
| Re: Maintenance Tips On Cars. by Alyssa575(f): 4:23am On May 22 |
MAP Sensor Failure Symptoms: Diagnosis and Repair This article explains the working principles of a MAP sensor (manifold absolute pressure sensor), lists seven common malfunction symptoms and causes, and explains how to quickly locate the problem using professional auto diagnostic tools like the Autel scanner, as well as common repair methods. Finally, it addresses some of the most pressing questions car owners have, such as "Can I still drive my car if my MAP sensor is broken?" What is a MAP sensor? The MAP sensor is a crucial component of the engine's fuel injection system. Its primary function is to monitor pressure changes within the intake manifold and convert them into electrical signals that are transmitted to the engine control unit (ECU). The ECU then uses these signals, combined with data from oxygen sensors, temperature sensors, and other sensors, to calculate the appropriate fuel injection amount and ignition timing, ensuring efficient and stable engine operation under various operating conditions. The location of the MAP sensor varies depending on the vehicle model, but is commonly found in: On or near the intake manifold In the intake manifold after the turbocharger Inside the air filter box In the firewall (connected to the manifold via a vacuum line, such as in some Ford F-Series trucks) How does a MAP sensor work? When the vehicle is started, the ECU provides a reference voltage to the MAP sensor. The piezoresistive or piezoelectric element within the sensor senses subtle changes in intake pressure and converts them into electrical signals. For example, when you press the accelerator pedal, the throttle opening widens, increasing intake pressure. The MAP sensor then responds with a new voltage signal. The ECU then recalculates the fuel injection rate and ignition timing to ensure efficient engine combustion and control exhaust emissions. Common Symptoms of a MAP Sensor Failure When the MAP sensor is malfunctioning, it can affect engine combustion, fuel consumption, and emissions. Common symptoms include: Check Engine Light (CEL) illumination Idling rough or jittery Engine difficulty starting or stalling Misfire or knocking Significantly increased fuel consumption Exhaust emissions exceeding standards, resulting in failure to pass the annual inspection The vehicle enters "limp mode" (limited power) 👉 For example, a Harley-Davidson motorcycle with a faulty MAP sensor may experience noticeable jitter at idle or even stall. When the MAP sensor is not functioning properly, the Check Engine Light (CEL) comes on. The check engine light may be on due to a bad MAP sensor. Common Causes of MAP Sensor Failure External Contamination: Oil, dust, or moisture can cause abnormal readings. Internal Damage: Deterioration of the sensor element, circuit breakage, or loose connections. Intake System Leaks: Cracked hoses or loose connectors can cause pressure to differ from actual pressure. Installation or Accident Damage: Physical impact or improper installation can damage the sensor. Reading fault codes: Using Autel Scanner to read DTCs from the ECU can quickly identify whether the MAP sensor is involved. You can also view the real-time data stream to determine if the sensor is outputting abnormal signals. Visual Inspection: Check for damage to the sensor, deterioration or loosening of the vacuum tube, and poor contact in the connectors Measure Voltage: Turn on the ignition (without starting the vehicle) and check whether the sensor provides a normal reference voltage (generally approximately 5V). Repairing MAP Sensor Faults Sensor Replacement: If the sensor is confirmed to be damaged, replace it directly. Clearing DTCs: After replacement, use an Autel scanner to clear the fault history. Road Test: Drive again and observe whether starting, idling, and acceleration return to normal. Scan again to confirm no new DTCs. Can I still drive with a faulty MAP sensor? Technically, the vehicle will still operate, but the following may occur: Lack of power, slow acceleration Significantly increased fuel consumption Difficulty starting Severely excessive emissions ⚠️ Driving with this fault for an extended period may damage the engine and catalytic converter, so continued driving is not recommended. FAQs Q1: What happens if the MAP sensor fails? A: Engine performance degrades, fuel consumption increases, and exhaust emissions fall below standard. The fault light illuminates, prompting the owner to promptly inspect the sensor. Q2: What happens if the MAP sensor is unplugged? A: The ECU enters protection mode, significantly reducing vehicle power and forcing the vehicle to travel to a repair center at low speeds. Fuel consumption and emissions also deteriorate dramatically. 📖 Summary Although small, the MAP sensor is directly related to engine combustion efficiency and emissions control. If an abnormality occurs, use diagnostic tools to promptly identify the problem and replace or repair it as appropriate to avoid significant losses. 1 Like |
| Re: Maintenance Tips On Cars. by temi4fash(m): 5:23am On May 22 |
jceesquare:Transmission box filter? Am not sure we have before and I have never seen a filter in it too. Would ask my mechanic Thank you |
| Re: Maintenance Tips On Cars. by lyort: 11:43am On May 22 |
Jesustheking:Good morning. Sorry the redirect function isn't working because I'm logged in on the mobile site and not the app. Please chat me on whatsapp 08145186824 |
| Re: Maintenance Tips On Cars. by jceesquare(m): 8:32pm On May 23 |
temi4fash:It is on the transmission underneath the air filter box and not inside.
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| Re: Maintenance Tips On Cars. by fatjo(m): 5:46am On May 24 |
It stopped when I fixed my gear switch. I drive 07 accord temi4fash: |
| Re: Maintenance Tips On Cars. by cryptocherith: 8:33pm On May 28 |
Please my car is displaying Maint reqd and also displaying the red warning sign. This happen after I embarked on a long trip and it popped up on my way back. Experts in the house, please what should I do?
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| Re: Maintenance Tips On Cars. by Abbeyismo(m): 8:58pm On May 28 |
cryptocherith:When last did you service the car? That why the maintenance light is coming on. Scan the car to know why the other light is coming on |
| Re: Maintenance Tips On Cars. by SatoshiVentures: 9:40pm On May 28 |
Thanks for the quality information. |
| Re: Maintenance Tips On Cars. by cryptocherith: 9:05am On May 29 |
Abbeyismo:I just confirmed from the seller I got it from that it was serviced about 11 months ago. Thank you for the information. I will go do the scan asap. 1 Like |
| Re: Maintenance Tips On Cars. by noobody(m): 8:41pm On May 29 |
cryptocherith:Omooo,una dey try to 11 months? |
| Re: Maintenance Tips On Cars. by minista94(m): 10:17pm On May 29*. Modified: 10:29am On May 31 |
You don't need to scan the car, just change your engine oil and oil filter and watch how to reset maintenance required light in YouTube or you tell your mechanic do reset it and the light would disappear cryptocherith: 2 Likes |
| Re: Maintenance Tips On Cars. by Abbeyismo(m): 10:19am On May 30 |
cryptocherith:Service ur car and reset the maintenance light it will go off after reset 1 Like |
| Re: Maintenance Tips On Cars. by elvisco44: 9:33am On Jun 02 |
Abbeyismo:2010 Toyota camry. 2AR venza Engine. P0014 Code. Issue started when one camshaft was replaced due to damage. Car jerks alot. Looking for timing chain expert.
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| Re: Maintenance Tips On Cars. by lyort: 10:08pm On Jun 02 |
elvisco44:Where's your location? |
| Re: Maintenance Tips On Cars. by elvisco44: 10:46am On Jun 03 |
lyort:Lagos |
| Re: Maintenance Tips On Cars. by lyort: 10:49am On Jun 03 |
elvisco44:Which part of Lagos |
| Re: Maintenance Tips On Cars. by MrAmaechi(m): 1:24pm On Jun 03 |
Hello sir. I need some guidance on what to check, Car, Hyundai sonata 2008. 2.4. When driving after like 30mins to 1 hours. The car finds it difficult to fire especially after hitting the breaks, it gradually picks, climbing hill with this can be hard. I have changed the fuel pump, drove on Sunday same issues, drove today, picks especially when you fire gradually. |
| Re: Maintenance Tips On Cars. by MrAmaechi(m): 1:34pm On Jun 03 |
MrAmaechi:
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| Re: Maintenance Tips On Cars. by ugreat(m): 9:06am On Jun 04 |
Please I need a contact of a car interior technician around Lagos Mainland. There are some broken and scratched plastic parts and dashboard I would love to fix. Car is '16 Mazda. 1 Like |
| Re: Maintenance Tips On Cars. by Louiscars: 10:17am On Jun 04 |
[quote author=MrAmaechi post=139605408][/quote]Judging by the fault codes given here and your performance issues I’d advice you to sort out the misfire Cylinder 4’s injector clearly as an issue and would need to be sorted out by a technician - secondly, tell the person who scanned this car to check what the fuel trim is like, your 02 sensors is most likely bad and given false readings Now the second reason why the car might be doing this might be transmission related, so if the above doesn’t give any much difference I’ll start with the Vehicle speed Sensor. Honestly, the vehicle needs hands on inspection to really ascertain the nature of the fault 1 Like |
| Re: Maintenance Tips On Cars. by faithbukky(m): 2:04pm On Jun 06 |
ABUJA lyort: |
| Re: Maintenance Tips On Cars. by RyanAutomotive: 6:58pm On Jun 06 |
elvisco44:Good day sir. Vehicle: Toyota Camry 2010 Engine: 2AR-FE (Venza Engine Swap) Scan Codes: P0014, P0504 Concern: Severe jerking after camshaft replacement Let’s address this properly before anyone starts replacing timing chains, sensors, or engine parts unnecessarily. * What P0014 Means P0014 = Exhaust Camshaft Position Timing Over-Advanced (Bank 1) In simple terms: The ECU is seeing the exhaust camshaft positioned further advanced than where it expects it to be. On the 2AR-FE engine, camshaft timing is controlled by: • Timing chain • Camshaft timing gears (VVT-i actuators) • Oil control valves (OCV) • Camshaft position sensors • Proper mechanical timing alignment The fact that this problem started immediately after a camshaft replacement is a very important clue. * What P0504 Means P0504 = Brake Switch “A/B” Correlation This code relates to the brake pedal switch system. While it should be fixed, it is unlikely to be the primary cause of the severe jerking you’re experiencing. Your main concern right now is the P0014. • Important Observation You mentioned: • The issue started after one camshaft was replaced. This immediately raises concern about the repair itself. Whenever a camshaft is removed or replaced on a 2AR-FE engine, several things must be perfectly aligned: • Mechanical timing marks • Timing chain position • VVT-i gear position • Camshaft installation procedure If any of these are slightly off, the engine may: • Jerk • Hesitate • Misfire • Lose power • Trigger P0014 * Most Likely Causes 1, Incorrect Mechanical Timing (Highest Probability) Based on your description, this is the first thing that should be verified. Possible scenarios: • Timing chain installed one tooth off • Camshaft timing not synchronized correctly • Timing marks not aligned properly Even being one tooth off can cause: • Jerking • Rough running • Timing-related fault codes 2, VVT-i Actuator Installation Problem The camshaft timing gear may: • Not be locked correctly during installation • Be damaged internally • Be installed incorrectly This can easily trigger P0014. 3, Faulty Oil Control Valve (OCV) The VVT-i oil control valve regulates camshaft timing. If: • Dirty • Stuck • Damaged it can cause timing over-advance conditions. 4, Camshaft Position Sensor Issue During engine work: • Connectors may be left loose • Wiring may be damaged • Sensor readings may become unstable 5, Low Oil Pressure / Oil Flow Problem The VVT-i system depends heavily on proper oil pressure. Restricted oil flow can cause incorrect camshaft timing operation. * What Should Be Checked Now Before replacing the timing chain: 1, Verify mechanical timing physically. This should be the first step. Confirm: • Crankshaft timing mark • Camshaft timing marks • Chain alignment 2, Check VVT-i actuator operation. Inspect: • Cam gear • Locking mechanism • Timing response 3, Inspect Oil Control Valve (OCV). Check: • Resistance • Activation • Oil contamination 4, Perform live data analysis. Monitor: • Desired cam angle • Actual cam angle • VVT response 5, Address the P0504 brake switch fault separately. * Do NOT Do This • Do NOT keep driving the vehicle aggressively • Do NOT replace random sensors blindly • Do NOT assume the timing chain itself is bad • Do NOT clear codes repeatedly without diagnosis * Professional Insight The most important clue in your post is this: • “The issue started when one camshaft was replaced.” As technicians, whenever a fault appears immediately after a repair, the first place to investigate is the work that was just performed. Based on the symptoms and P0014, there is a strong possibility of: • Mechanical timing error • VVT-i timing issue • Camshaft installation issue before condemning the timing chain itself. * Ryan Automotive Limited Recommendation The next step is a structured engine timing and VVT-i diagnostic procedure, including: • Mechanical timing verification • Camshaft timing correlation testing • VVT-i actuator inspection • Oil control valve testing • Live data analysis At Ryan Automotive Limited, we always verify timing mechanically before recommending expensive parts replacement. Many cases like this are resolved by identifying installation or timing correlation issues rather than replacing the entire engine assembly. If you’re able to provide: • Whether the replaced camshaft was intake or exhaust • Whether the timing chain was removed during the repair • Whether the check engine light came on immediately after the repair a more targeted assessment can be given. Precision • Transparency • Excellence Ryan Automotive Limited |
| Re: Maintenance Tips On Cars. by Abbeyismo(m): 9:01pm On Jun 06 |
elvisco44:You can reach out to me on my line. Did you buy new cam shaft sprocket or tokunbo? |
| Re: Maintenance Tips On Cars. by kingreign(m): 6:45pm On Jun 08 |
elvisco44:07034581213 DM me, I can be of help. |
| Re: Maintenance Tips On Cars. by elvisco44: 2:03pm On Jun 09 |
Abbeyismo:Tokunbo camshaft (with sprocket). I still have the old complete camshaft. I think the mechanic was supposed to change the damaged sprocket. But instead asked to buy another complete camshaft. 1 Like |
| Re: Maintenance Tips On Cars. by conyema12(m): 2:18am On Jun 16 |
Good morning great Engineers and Car Enthusiasts, I love the way car issues are handled here, I have some questions. I want to change my car from 1999 camry to 2014 camry and i want the know the best way to buy from, my lastr car was from Cotonou but i dont think i have that time now, is there a great car market in Lagos where i can make selection like i did in cotonou? In fact what is the best approach , I really do not have the luxury of time waititng to buy and shift from US or Canada. I need an already made food ...lololol |
| Re: Maintenance Tips On Cars. by RyanAutomotive: 6:23am On Jun 16 |
conyema12:Good morning sir. First of all, congratulations on the upgrade plan. Moving from a 1999 Toyota Camry to a 2014 Toyota Camry is a major upgrade in terms of comfort, fuel economy, safety, technology, and overall driving experience. * Professional Buying Insight From your post, I can tell that your priority is not necessarily finding the cheapest car. You are looking for: • A good vehicle • Minimal stress • Minimal waiting time • The ability to inspect and choose physically • Peace of mind after purchase That is actually the smartest approach. * The Biggest Mistake Most Buyers Make Many buyers focus only on: • Model year • Price • Exterior appearance • “First body” claims Unfortunately, those are not enough. Before buying any 2014 Camry, the real questions should be: • Is the engine healthy? • Is the transmission healthy? • Has the vehicle suffered major accident damage? • Are all electronic systems functioning properly? • Has the mileage been tampered with? • Was the vehicle previously flooded? A clean-looking car can quickly become an expensive project if these checks are ignored. * What Are Your Options? 1, Buy From a Reputable Dealer in Lagos This is probably the fastest route for someone who doesn’t want to wait for shipping from the US or Canada. Advantages: • Immediate inspection • Immediate delivery • Multiple options available However, proper inspection is still necessary before payment. 2, Work Through a Trusted Automotive Company This is usually the safest option. A good automotive company helps: • Source the vehicle • Verify condition • Inspect engine and transmission • Perform computerized diagnostics • Help negotiate based on actual condition This significantly reduces the chances of buying a problematic vehicle. 3, Direct Importation This often gives you the most control over vehicle history. However: • It takes time • Requires shipping and clearing processes • May not suit someone who wants a vehicle immediately From your post, it sounds like you want something already available and ready to drive. * What I Would Not Recommend • Buying solely based on pictures • Paying because the seller says “nothing to fix” • Trusting a quick 5-minute mechanic inspection • Making payment before a diagnostic assessment These are some of the reasons many buyers end up spending hundreds of thousands or even millions after purchase. * Professional Insight The best vehicle is not always the cheapest one. A properly maintained Camry purchased at a slightly higher price can save you far more money than a cheaper one with hidden engine, transmission, or electrical issues. The goal is not just to buy a 2014 Camry. The goal is to buy the right 2014 Camry. * Ryan Automotive Limited Recommendation At Ryan Automotive Limited, we don’t just diagnose and repair vehicles — we also assist clients with vehicle sourcing and sales. If you’re looking for a clean 2012–2014 Toyota Camry, you can send us: • Your budget • Preferred trim/specification • Foreign used or Nigerian used preference We can help source suitable options and also carry out a professional pre-purchase inspection before any payment is made. Even if the vehicle is not being purchased directly from us, we strongly recommend a computerized diagnostic scan and physical inspection before committing your money. That small investment can save you from buying someone else’s problem. If you’re within Lagos or can reach Lagos, feel free to contact Ryan Automotive Limited. We attend to clients from different locations and would be glad to guide you through selecting the right vehicle. Precision • Transparency • Excellence Ryan Automotive Limited Vehicle Sales | Vehicle Sourcing | Pre-Purchase Inspection | Professional Automotive Solutions |
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