₦airaland Forum

princejones:
thanks sir,it was service or should it be change

You actually need to confirm if it working before u swap it and also confirm the VTEC solenoid too

luvinhubby:
Baby boy, does not use VTECH switch, would rather he replace the throttle body,

But Oxygen sensor issues are like Malaria in Honda vehicles, can manifest different symptoms.

Honda accord I4 1998-2002 comes in 2 version VTEC version and non VTEC .

princejones:
Good evening everyone, please my Honda accord 02 is not reving(rpm)past 4 when firing it and as such do not pick up well when you want to force it take off at speed,though it drive and changes well if you are just moving it normal,the gear is new as the former was almost doing well the same thing that warrant me to change it.The scanned only gave 02 sensor fault,though check light is on and maintenance light do comes up when starting the car. Cc luvinhubby,gazzuzz,honmusa and others

Check the VTEC switch!!

ultimatenath1:
At sultan ...thank you for ur response...d temp gauge is at d middle most times..i tot d fan shud pik up.if.d.engine is very hot since it uses a thermostat
.
.
Secondly..my worry is d ac, d car doesnt accelerate faster as i expet wen d ac is on. Wat do tink
..

Compressor switching on is already an extra load on your car and so you don't get the same performance wen it is off and couple with that there is a existing issue that is yet to be taken care ,the performance will definitely drag with ac on na

good188:
I'm using Toyota corolla bank type 2006 , I want to know if this engine oil good to service my car visco 2000_ because that's what mechanic used for me and this is my second time to service the car ,guru in this house help

Check your filler cap ,your manufactured recommendations is sae 5w30 not 20w50.

ultimatenath1:
Dear friends,

Im currently using a V6 nissan maxima..i noticed my car does not accelerate faster wen d Ac is on., its also jerks wen d engine is hot..and once its jerks. No.more acceleration.

It uses a thermostat with double radiator, but d fan doesnt com up wen d engine is hot, until i put on the AC before d 2 fan coms up.

Please advise on how to go.about this..i dnt wana jump.frm kazeem to taju to lati.

Ur advices amd opinion are well appreciated.

Thanks alot.

Run a diagnoses on the car and be on look out for lean mixture .
Possibilities -Clogged EGR valves,clogged fuel injection, etc

sultaan:
There is no way your catalytic converter was blocked without a code. But it should have no bad effect on engine you should still have a code from the downstream oxygen sensor

Not every time !!!A times some prevailing issue elude the engine management system .90% cars from Cotonou already have the cat removed and not all of them have catalyst code (P0420) triggered even with a well functioning downstream O2 sensor ,I see this all the time!!
Also Cat monitor test always take a longer Drive cycle to complete relatively and during the time the test is not completed , DTC related to the issue will not come up in case the cat is bad until the test is completed

Egji:
The mechanic scanned the car and checked all the wiring to the radiator fan. I'll check myself, though. Thanks

Your radiator fan is a single one ,so the possibility of your fan nor working is Nil in the case you describe above .If you need to check anything related to fan,check the direction of flow!!!

Doslop:
My exhaust was blocked and the Capra lyric converter bad, it was removed and I feel the engine has more power now, I plan on replacing it soon, there is no CEL light on even when it was blocked but the car had always consumed fuel roughly between 10-12mog, which is supposed to be 15-17mpg. The mechanic said the catalytic converter is responsible for the high fuel consumption, I asked him how much it is sold and he said 60k, the question to all gurus here is "does catalytic converter really reduce mileage?"

You need to state your car model to get better response.
Blocked cat will reduce fuel mileage drastically cos the blockage will acts as restriction to flow of exhaust .
In extreme case of restriction it can damage the engine completely!!
Your car require good inflow and outflow just like human being to be in good state of health.
To protect our evironment u can replace the cat.

Egji:
No the coolant level doesn't reduce. I don't allow the car to boil over. Once I notice that it's over heating I turn off the a/c and the temperature returns to normal (i.e. mid way up the gauge)

The fan has been set to always be on the highest speed, because the manual compressor doesn't have the sensor to control the fan when the a/c comes on.

Prior to this issue, any history of overheating before?

W

Egji:
Hi everyone, I'm starting this thread to request help from the nairaland community in troubleshooting the issue I'm having with my car.

I drive a Toyota Corolla, it runs perfectly fine without the a/c on, but when I put on the a/c on a hot afternoon in traffic, the car starts overheating.

My radiator has a single fan, functioning for both the radiator and the condenser

I have visited a mechanic, who scanned the car. He replaced the a/c relay that controls a manual a/c compressor and the engine thermostat. But he left the fan running directly with the ignition because the compressor was not controlling the radiator fan when we put on the a/c.

I have flushed the radiator and steam washed the condenser. Then we refilled the cooling system with red abro anti rust coolant. And bleed the cooling system.

I tested the car in heavy traffic and it still overheats. Please what do I do now??

How often do you top up your radiator coolant?

EnigmaticEnigma:
Lol, yes oo, up Toyota!!!!

on naija peeps

EnigmaticEnigma:
Its a 2010 avensis

20w50 for a 2010 car ??

EnigmaticEnigma:
Hmmm, I actually can't find a Nissan manual that allows the use of 20w 50.

Maybe Nissans really can't use that oil, guess it pays to check your manual.

My Toyota manual actually includes 20w 50 as an option, as shown in the image above

Which year is your toyota

I am yet to see a manufacturer that will specifically state that you will have to use 20w50 with frequent oil change for car of year 1997 and above
please let me know if you see any

EnigmaticEnigma:
No, you misunderstood.

I'm not saying Toyota says to change oil every 20,000km, I'm saying that some people don't even change their oil after driving that many kms and their engine still runs fine.

Toyota recommends changing oil every 5000km.

Your customer changed oil even more frequently than that, which was every 3000km. I know it's a Nissan, not Toyota, but I think the recommended oil change intervals should be similar.

OK let check Nissan manual about this
SAE 5w30 viscosity is prefered for all ambient temperature !!

EnigmaticEnigma:
Lol, na wa oh

but as someone said though, I don't think using 20w 50 oil is a bad thing.

My Toyota manual says to use oil with lower viscosity as standard, but it also permits the use of more viscous oil in high temperature environments and at high speed.

You are making me scared cause if that customer is telling the truth about his maintenance history, I don't see how using 20w 50, every 3k km would be a bad thing.

Some people don't even change their oil after 20,000km, but this guy was diligent enough to change his oil even more regularly than the manual suggests and his reward for that is to buy a new engine, chai!!

I'm scared yo

What is your car model so that I can help you to truly confirm if Toyota say that you can use 20w50 and cover 20,000km before oil change

menstrualpad:
The fact that a particular cylinder soaks plug in oil is still not full proof that the engine must be changed!
.

I said that is my business decision ,na by force !!!

OPUSDEI1:
Fear Nissan, fear P1130!
I believe we are all here to learn. I have had the same model of car with same problem come to my workshop for diagnosis and the issue was resolved by a colleague for 30k. The best info I could get from him was that it was vacuum related. Talk about trade secrets.

Replacing the engine MAY solve the problem, but the problem is not with the engine, that I can assure you. Solving P1130 on its own will be way cheaper.

If you have taken time to do your due diligence on the issue ,you would have been able to demystify this issue cos everything has it own principle ,study it and you become its master.Quote by will Smith "God place the best thing in life at the other side of terror "

menstrualpad:
I will only believe an independent panel consisting of Gazzuzz, Costee and opusdei.... Not castigating you though. Purely scientific reasons.


If you meet the m272 engine on a bad day caked and soaking plugs not revving .... Engine change ni abi?

Seems u don't believe in this experiments then no reason for u to continue to follow thus thread again cos it a waste on time on your part !!!
Cos your unbelieve don't change the reality on ground!!!

EnigmaticEnigma:
Hey autologic, what about the throttle body fuse and relay and the throttle sensor

Not a car tech, but I just watched YouTube, lol.

Have you ruled those out

All those are have overrule since year 2000BC

menstrualpad:
The fact that a particular cylinder soaks plug in oil is still not full proof that the engine must be changed!

If anything...the reality of it not revving beyond 2000rpm indicates another underlying issue.

like I said earlier I don't engage in unending argument that is not back up with scientific facts. A car is a product of science ,so it works based on a laid down principle ,any of your assertion must have a logical basis!!
We prove that wen we get to the practical demonstration stage

So what we truly need to confirm is wether a stuck close swirl solenoid can affect the engine rev( though I don't think so ) but the possibility is there!!
So we now proceed to the R & D lab to start the practical demonstration!!

Let check the manufacturer manual on the theory of operation !!

The swirl control valve is located in the intake passage of each cylinder and it closes or opens depending on the prevailing conditions. Default is open status rather close and when it is closed that the ecu is in action . And for it to remain close this 3 conditions must be maintained
1.Engine temperature between 10 and 55 C
2.Low engine speed operation
3.Idling .
which means anything outside of this condition the ecu will not trigger the solenoid I e the solenoid will remain open!!
But we need to dive further on what actually happens when the valve open and wen it closes on the engines performance.
When the valve closes ,the velocity of air in the intake passage increases promoting the vaporisation of the fuel and producing swirl in the combustion chambers therefore optimising low speed engine torque condition!!
Ordinary speaking ,close valve will reduce the overall volume of the air intake manifold and reduce the pressure and thereby a acting like a barrier to flow of air .At idle and low speed condition ,power needed to run the engine is minimum as compared to high speed condition .Hence the whole essence of closing this valve is to reduce fuel consumption and conserve power with better torque!!
However ,what happen at open valve ,the air intake system in increased and thus guarantee more air inflow and overall volumetric efficiency is increase and thereby gaining the maximum power output.
Therefore the ecu will not trigger the solenoid when power is needed at high speed .
So a bad ecu that refuse to trigger the solenoid will only affect fuel and stability(torque )at low speed negatively only but will still be good for high speed conditions!!!
So drawing from this inference a bad ecu will not affect rev at high speed !!
And same thing will be applicable to stuck open solenoid .
So we only have stuck close solenoid to contest with cos the possibility is truly there !!!

Enough of derailing let continue !!
Back to the theory of operation of swirl control solenoid!! The reason we are actually making a study out of this solenoid it is to see if it possible for a defective swirl control solenoid to cause rev issue(as claimed by costee) .
If we study it together holistically ,we should be able to draw an objective conclusion on what is the worst possible symptoms a defective swirl control system can cause even if we have a defective ecu that refuse to trigger the solenoid !!!(as claimed by nurey)
We are all learning together !!!
Below is the schematic diagram of the swirl control system:y.
A Swirl control vary the length of the intake tract - in order to optimise power and torque across the range of engine speed operation, as well as help provide better
fuel efficiency -from wikepdia

Before I get the swirl solenoid test maybe we get some background information on it so that testing will be easily understood by all and sundry !!
Swirl control is basically a variable Intake manifold control system just for performance purpose!!
There a lot of implementation of variable air intake control system by different manufacturer namely
BMw:DiSA
Toyota :variable Induction system
ACURA:Variable Volume induction
Etc

menstrualpad:
So how much would it be with transmission?

250k

menstrualpad:
Plus transmission?

Not possible sir unless something is the wrong with them !!

nurey:
If it's one thing I learned from my Nissan Almera, it is perseverance and patience. Nissan diagnosis is test, confirm, retest reconfirm, ponder about result then retest again something as little as a wire off the socket can give symptoms not expected.

I actually sort out the code since Costee kept on hammering it I just wanted to know what it was about. The result came out as swirl valve, I don't even know what that was but no knowledge is wasted (I followed the links because this car type could be my next ride God willing).

The link I followed had same steps you said had been taken before and even more were added by a Nissan expert to the solution but the car owner kept telling him those things had been done and no improvement. The car owner came back that he just changed the ECU Pam the car was as good as new, my thought was now that if the ECU was bad why will it be able to store DTC until I remembered someone had an issue with a kia cerator of plugs and misfire and GAZZUZZ said he should change the ECU that it was the culprit.

Sometimes car diagnosis can be funny, it's not mostly about the amount of gadgets you can lay your hands on, it's about the benefit of a doubt. Don't over look that code.

We will revisit the testing of the solenoid on Monday !!!
So the focus of the test and experiment is if it possible for the P1130 to be responsible for the rev issue !!

GAZZUZZ:

Good luck bro

thanks

GAZZUZZ:

a misfire oncylinder 4 will not cause vehicle not to rev past 2rpm. I like your approach to solving issues, but you are most likely going to have same result with a new engine (been there done that on same vehicle)

Look beyond the misfire.

like I said earlier ,I have a similar case before ,it was a misfire issue from a single cylinder that the car refuse to rev beyond 2000 rpm. so from that background knowledge I know it possible for misfire to cause this issue even without any diagnoses .But I am not even using that as basis for this one as I have already done my own critically work on it before making my definite diagnosis.
however I have already sent for the car and I will make open all my test on the electrical on Monday