₦airaland Forum

RyanAutomotive:
Good day sir,

Thank you for explaining the situation clearly. We understand why this is worrying — especially after replacing several components and still seeing the same fault. You’re right to pause before allowing anyone to “open the engine.” 👍

Vehicle: Toyota Camry 2008
Engine: 2.4L (2AZ-FE)

Let’s break this down properly and remove the fear and guesswork.

⸻

🔧 Professional Diagnostic Insight — Camry 2.4L (P0303 & P0172)

Reported Symptoms:
• Persistent P0303 (Cylinder #3 misfire)
• P0172 (System too rich – Bank 1)
• Rough idle
• Jerking at low speed
• Swapping plugs, coils, and injector made no difference
• Unplugging coil #3 causes little or no RPM drop

This combination tells us something very important:

⚠️ Cylinder #3 is contributing little to nothing at idle, and the ECU is over-fueling to compensate.

⸻

🚨 Critical Observation (Very Important)

You have already ruled out:
• Spark plug
• Ignition coil
• Injector
• External wiring faults

That immediately narrows the issue down to mechanical or air/fuel control imbalance, not electrical guesswork.

However — this does not automatically mean the engine must be opened.

⸻

🔍 Likely Root Causes (Ranked by Experience)

1️⃣ Intake Manifold / Vacuum Leak at Cylinder #3 (Very Common)

On the 2AZ-FE engine:
• Intake manifold gasket leaks often affect specific cylinders
• Cylinder #3 is a known hotspot

This causes:
• Lean misfire on one cylinder
• ECU compensates by adding fuel → P0172
• Coil unplug test shows little change because the cylinder is already weak

➡️ This is frequently misdiagnosed as a bad engine.

⸻

2️⃣ Valve Seating Issue (Not Full Engine Failure)

Possible but less severe than people fear:
• Slightly burnt exhaust valve
• Carbon buildup preventing full valve seal

This results in:
• Low compression on cylinder #3
• Poor idle contribution
• Misfire mainly at low RPM

⚠️ This can often be confirmed without opening the engine using proper tests.

⸻

3️⃣ Stuck-Open Injector or Fuel Control Error

Even if the injector was changed:
• Aftermarket injectors can over-fuel
• ECU trims may be heavily skewed due to long-term misfire

This causes:
• Rich mixture code
• Rough idle
• Cylinder imbalance

⸻

4️⃣ ECM Fuel Trim Adaptation Not Reset

After repeated parts replacement:
• ECU continues using old correction data
• Misfire and rich codes persist even after good parts are installed

⸻

🔎 What Tests Should Be Done FIRST (Before Any Engine Work)

Before anyone talks about “bringing the engine down,” the following must be done:

✔️ Cylinder compression test (dry & wet)
✔️ Leak-down test (pinpoints valves vs rings)
✔️ Intake smoke test (checks gasket & vacuum leaks)
✔️ Live data review (short- & long-term fuel trims)
✔️ Power balance test via scan tool

Only these will tell the truth.

⸻

🚫 What This Is NOT
• Not coil brand
• Not spark plug heat range
• Not random injector swapping
• Not wiring guesswork

Opening the engine without these confirmations is risky and expensive.

⸻

⚙️ Ryan Automotive Limited — Professional Take

From experience, over 60% of Camry 2AZ-FE cylinder-specific misfires end up being:
• Intake gasket leaks
• Minor valve sealing issues
• Fuel trim mislearning

Not total engine failure.

An engine should only be opened when mechanical loss is proven, not assumed.

⸻

📌 Recommended Next Steps

We strongly advise:
• Full Toyota live-data diagnostic scan
• Compression & leak-down testing
• Intake system smoke test
• ECU adaptation reset after confirmation

📍 Clients bring vehicles to Ryan Automotive Limited from different areas because we diagnose first, repair once, and avoid unnecessary engine work.

If you want clarity and peace of mind before making a costly decision, you’re welcome to bring the vehicle in.

Ryan Automotive Limited
Precision • Transparency • Excellence
📍 Lagos, Nigeria

AI??

Edunwa302:
My 2008 Camry 2.4L keeps throwing P0303 and P0172 codes. I've already swapped out the plugs, coils, and fuel nozzle, and an electrician checked the wiring, finding no issues. The engine idles rough and jerks at low speeds. When I unplug the coil wire for cylinder #3 while idling, there's barely any change in the RPM. My mechanic thinks it's an engine problem with cylinder #3.

Have anyone encountered such issue before, I'm afraid of bringing the engine down.

your car will behave as if it has HIV once your Injectors where swapped, simple reason cos they are coded to Engine cylinder number ,Now plenty mechanics do not know this, You need a dealer level scanning tool to program them to respective cylinders. There is a number on Each Injectors so go to someone with a fairly decent scan tool to program them with the numbers on them. Start from there.

Edunwa302:
How do I check ECU, please

you plug scanner, dont do wire sparking B4 you toast your ECU

HawkTuahGirl:
Before you get solar system, they will say you don't need NEPA, you don't need generator, it's a lie.

The solar system is only good if there is sufficient sunlight, without it, it's just a seasonal fruit.

Two weeks now, little or no sunlight to charge, from user point of view, I m pissed. My only saving grace is my old rusty generator. I thought I m free but I thank God, I didn't scrap it

In NIgeria?

Amotolongbo:
If truly the naira is rising organically with no subsidy by the CBN, it really worths celebrating.

With this rate, it may end up falling below 1500 for a GBP before December.

there is nothing like Naira to pounds market to compare, its always compared to the Dollar he pounds is compared to the Dollars, then niara rate is derived from it. Even if the dollar to naira rate does not shift just shift in Dollar to pounds rate depilates the naira.

Omooba77:
https://www.nbcnews.com/news/obituaries/rev-jesse-jackson-civil-rights-activist-dies-rcna42408

Great men, what a great MAN

muykem:
I support electronic transmission but we need to ask ourselves some question. For example, if saboteur cut Anambra state off of Internet on election day, what happened to results there?

Use plan B, Old system, however they do not have power to cut off the internet completly

ZUBY77:
Your bandits are exporting churches to South Africa. They are making money without paying tax. Atleast MTN is better

ahahahaah Religious bandits ahahahah

Reference:
In other climes the authorities will look into this to see if this buyout stifles competition and is potentially creating a monopoly.

But in a country of weak institutions where even certain individuals appear bigger than the country thoughtless of conglomerates, nothing will be cakes into question.

It is the nature of men to become as powerful as possible. It is the responsibility of society to see this is done safely.

This kind of statements could only come from one who is not in the know of what is happening here. These guys just bought transmission infrastructure which already have its own contract, it is not going to increase customer base of MTN, its actually a very bad move I suspect this is just to manipulate share price because if you do a proper research you ill realize that MTN already has up to 23 or 24% stake in IHS

Exousiang01:
About 90% of the masts you see around the country are IHS

This is true. I think this is a bad move cos they have just inherited all of IHS debt and struggling infrastructure, they now have to manage all the towers and masts,

Kukutente23:
Nigeria has become MTN's cash cow
They are making more money than even south Africa they come from
Na dem sell towers give IHS na dem still buy am back
The founder of IHS is definitely walking home with some good bucks in this

This is how poor people reason, WHo told you that someone on our street does not have a share in MTN? My AC man works for a company that maintains the temperature for these towers in PH, he gets paid well, Who sells the credit are they not Nigerian vendors?WHo do they pay taxes to is it not Nigeria?GLO that is owned by Nigerians are they any different? nah people like una dey say Beer bitter.

KhalifaJay:
Everything totals 5m it comes with job and accommodations and health insurance, the monthly pay is good according to my brother.

nah so dem dey use Scam una

KhalifaJay:
Hello everyone, Lemme go straight to the point.


My junior brother wants to travel to another country ( Kuwait and oman in particular) of which I will sponsor everything but I have told him to change to his mind on the country he's choosed but he's not. He said he wants to start from somewhere before moving to Europe after some years I tried to change his mind to move to another country but he seems to have made up his mind.

I need your suggestions before i send the money to process the visa to the agent that will do it.

What do you guys think? Is it a good country to start hustling ?

Thanks

And you realy came here to ask this question, why would anyone in their right senses want go to those places if not having a secured JOB and Accommodation in hand

MrEar:
If the objective is truly about protecting children, then why not propose a law that prohibits the sale of alcohol to anyone under the age of 18, with strict penalties for those who violate it?

Don't mind them, what they should push for is
1 ban the sale of any Alcohol to anyone under the age if 18
2 Ban sale of alcohol b4 2pm
3 ban consumption of alcohol in front of anyone under the age of 18
4 Licence the sale of Alcohol
5 Anyone under the age of 18 should not work. Serve or sell alcohol in the premises the abide or work or help.
This is the way to go,

Dalohad:
The Igbo name is there for Cybercrime not funding Boko Haram. It is listed as CYBER2.

The names of Northern and Yoruba muslima there are all linked to Boko Haram. Stop trying to brush everyone with your Islamic terrorism rubbish..

Boko Haram terrorism is an religious war and Igbos are not Muslims..

Who said there are no Igbos as Muslim, go to the Mosque in Enugu and tell me if there aint no igbos there

Zorn:
Boko haram, BH is an islamic fundamentalist ideology of banning western education and wanting an islamic state, so my question is what has that got to do with an igbo man that is definitly not a muslim?

If you check my post I never mentioned BH, however if you have a conversation with a real Muslim you will realize they detest these sect of people. So I sha;; go back to what I said, Anyone who terrorises any group o of persons is a terrorist.

Manny21:
Some idiots will be gullible enough to believe the idiot. Olorun kuu suru

dEY THERE, u NOR SEE ONE PASTOR OR mog IN soUTH soUTH nIGERIA WEY SAY gOD GIVE AM THEY KEYS OF DAVID ? Even give am Miracle money wey Him dey sell??

Love800:
If VIO does motor inspection, then what is the job of road-safety officers?

Imspect galop and Pot holes

Antoeni:
The Federal Court Has Ruled But The Attorney General And Commissioner For Justice, Lawal Pedro, SAN, is Talking Nonsense ...He Should Be the One That Should Be Prosecuted For Breaching Court Order ..VIO Have No Right to Stop Cars And Ask For Paperwork

This is contempt of the law, is the LASG ministry of Justice higher than the federal high court judgment? Pls they should let us know

Federal Constitution is Still Superior to State Laws As Far As Nigeria is Concerned.

Somebody don go pay smthing cos Hunger dey the land,VUO belong to the workshops for road worthiness, but I tell you what half of them no next to nothing bout vehicle safety

Gajagojo:
They have no evidence that what?
Did you read the charge

Did you Comprehend it

If you. Understand simple English you won't spew this

The charges are very clear he admitted receiving information from illegal telephone intercepts and he did not report to police

That is an offence


It does matter who so called SOMEONEi s


If armed robbers Rob a bank and in the process of escape some money falls from their vehicle you take it and spend it that is a crime

You don't need to know the robbers

You guys watch too much Movies and just conclude, This so called evidence you are masturbating about is derived from a TV program, which was edited and aired. These sort of evidence are not admissible in court a smart lawyer will fru it out in 5 mins. The only reason this has managed to go to court is cos they are u sing tax payers money, if it were his personal money do you think he would waste it on matters like this ?The defendant will simply say he never said that and that it was edited and there is no proof to say he was lying, and the persecution has to prove beyond reasonable doubt that they are right, This evidence is rubbish, they do not even have specific time of this bridges and what they heard or collected ,Bridge of phone conversation aka phone tap has technical foot prints and these needs to be brought to court.

David160:
BREAKING: Federal Government to arraign Elrufai for tapping phone lines of NSA.

source

No case here, relying on hear say from anybody is not a grand for admittance of guilt, its ones word against the other, unless they can technically prove this offence was carried out and show its consequences. Evidence of data bridge should be shown not just words, nah so Una dey waste tax payers money.

Agbaneson:
They should be thoroughly interrogated until all other accomplices' names are mentioned.
NONSENSE....

where dem for wan see them?

Zorn:
What is the business of an igbo man with radical islamic movement you can say cyber crime but boko haram as how na?

Bross Terrorism no get race, colour, tribe or nationality ohhhh, once you terrorize any community you be terrorist, na so them define am now for Nigeria

Bullhari:
In America, the are terrorism financiers, but in Nigeria, there are kingd

I just hope you know these lot do not live i n the USA but in the UAE,so as seen, they are not arrested or nowhere to be found yet, but thier assets seized even in the UAE

naijapikin2:
This is the best pictorial representation of valentine. John 3:16 says for God so LOVED the world that he gave his only begotten son......the love of God is the greatest love for vain is the help of man.
Shalom 🙏

2026 you lot still. Believe this is the photo of Jesus??seriously

PresidentMUGABE:
Even marriage that was done in Kano state with 3000-Naira also crash......

Bros hustle make 🍺 beer non bitter for your mouth.

tell him again,Nah poor man say beer bitter

Naya261:
I am planning of travelling to the UK for my Msc programme. My main purpose of travelling is as a means of jakpa not that I really need the Msc. I sold the land i bought in Asaba in 2018 for N22m. I plan to use the money for the tuition fee deposit ( £5,000) and other travel expenses. The complete tuition fee is £15,330. I will study and work in other to pay the remaining balance.

My plan is to remain in the UK and work after my study. Please I need your advice.

Go to the and take your chances, reason, you have not done Biz in Nigeria b4.Why dont you tap into the COS route which gives you full rights to work and live in the UK instead of paying for one school and struggle to complete payment and do black under G jobs

anonimi:
What did your own senator and representative say about amending our laws to criminalise estimated billing

And how did you come to the conclusion he was my senator? and do you know where I live?

anonimi:
Are you working with other people to return us to PDP deregulation and privatisation policies that gave us 16 years of prosperity?

What is the experience of Aba people with Geometric private power company? Does it further validate how private companies are best for the country, as opposed to APC progreThief palliative sharing, job killing government owned companies?

ahahah, We should not politicize everything, I tell you what, the Electricity troubles and the power troubles we have in Nigeria are not solely caused by Politicians rather civil servants are the main culprit but the scream bad government. Look at ordinary Metre that should be installed we already see troubles. I think what the government needs to do is give an ultimatum to outlaw estimated billings, this is how the workers short-change investors, Have you not heard of how PHCN officials go instigating people for bypass or encouraging them not to have prepaid metres?

casualobserver:
You are a minority. And please don’t confuse working remotely with being skilled. There are lots of jobs Nigerians are now doing abroad or remotely simply because those roles have become too low level for the locals in those country for the pay. If Nigerians were truly that skilled and resources, foreigners wouldn’t be here taking low level jobs. The best bricklayers, carpenters, painters etc in Nigeria are not Nigerians.


That’s isn’t to say there aren’t skilled Nigerians, the are few and far between. I know.

You are the one in the minority with this school of thought my friend. you are remotely short in the knowledge of remote working thinking it is fixed at just desktop work. What do you understand by remote work?
So cos you do not see foreigners' sweeping the streets you think we are not progressing and there are no JOBs ,you are xtreemly funny,do you know how many people are employed and are not captured in teh data base of employment for one reason or the other?There is no one country in the world where there are Jobs vacant skilled or unskilled with no one to fill in.
Coming back to remote jobs, Let me Enlighten you a bit, as we speak, I know 15 guys who are almost at the end of training for their Drone pilot licence. A surveillance. Data capture, Remote upgrading and trouble shooting, we even have guys remotely diagnosing people as a GP, and this is what the west is going to as we speak, I am a fluid Engineer and I am in Nigeria as we speak and I'm on my laptop still working in PH and controlling stuff in the UAE remotely, Like I said once again Speak for yourself brother.

medolab90:
Are the people ready to pay ? Personally I dont think every aspect should be left to the private sector. We still need electricity to be affordable to the general populace to grow as a nation.

Over ready to pay dey worry Nigerians, if anyone told you a fish seller in the market will have POS machine and two mobile phone lines active 20 years ago will you believe?
As you speak,Electricity is getting cheaper via alternative source, let me tell you my personal experience, there is a device sold at N40k, it has three LED bulbs anda charging station for laptops and phones, it has one mini panel. Suitable for persons ie students living i self con, one bulb bathroom, one in kitchen and one n main room sorted, can last all darkness periods till the morning. I gave these to 10 guys from my village who are at Uni.

casualobserver:
Nigeria has bigger problems preventing the creation of jobs….a majority poorly educated/uneducated and unskilled population. Put in the power today and you will find you don’t have the Local skilled resources to fill the vacancies.

Manual labour, yes, skilled jobs no! Even our carpenters, bricklayers, painters etc come from neighbouring countries.

Bro you can speak for yourself, do you have any idea how skilled Nigerians are fru self thought? you really think so little of yourself. I can use myself as an Example, I also have loads of colleagues too who re Nigerians working remotely from every part of the globe, we as Nigerians are very resourceful with minimum help fro the government of the day. Our problem is this bloody Electricity once this is fix, we have fixed 70% of our problems, corruption will reduce drastically cos everything will now be electronic and has a trail.