Expert Support Required on Issues with Toyota Crown 2JZ-FSE Engine

[pwuser151508296679]

Hi,
I have a Toyota Crown 2000 (JZS175) with 2JZ-FSE engine. The problem with the car is its engine slightly jerk on idle but not every time, and the same sort of issue occurs on high speed while leaving the accelerator pedal. The issue disappears as soon as the accelerator pedal is slightly pressed. There's no loss of power and no fault code. But exhaust smells like bad mixture.
So far, I have gone through below list of jobs:
1. Spark Plugs replacement
2. Ignition Coils replacement
3. Injectors checking and cleaning
4. MAP sensor replacement
5. Vacuum pipes replacement
6. Throttle service (tried with another throttle body but no luck)
7. Timing belt replacement
8. Catalytic converter cleaning
9. Fuel pump and filter cleaning
10. EGR cleaning
11. Vacuum Switching Valve replacement
The car is running on Hi-Octane and using Meguin 10w40 synthetic oil.
Appreciate if someone could direct me to an expert of these engines or someone who has faced same sort of issue.

[dani_kk]

Have you got the engine compression test done?
What is the spark plug colour?
We are Islamabad based if you want to get it physically inspected you can.

[pwuser151508296679]

Please see my responses against each question:

Have you got the engine compression test done?
No
What is the spark plug colour?
Carbon Black. I got them check almost four times in the last one month.
We are Islamabad based if you want to get it physically inspected you can.
I'm in Lahore and would prefer someone from here to help me. If you know any expert here in Lahore, please help.

[saad0irfan]

Visit @syncview

[consigliori]

@dani_kk bhai please pm me your cell number

[consigliori]

@syncview. Eyes closed....

[saad0irfan]

What do you mean??

[consigliori]

I mean visit Osama @syncview with eyes closed as he is the best. What's wrong in this bhai? He is a Fantastic professional and the only person (other than Honda Dealership) which has worked on my Civic X and what a great job he did​

[saad0irfan]

Lol, I thought you meant he passed away.

It's only a misunderstanding, sorry.

[dani_kk]

Looks like you either have afrs compromised or have mechanical problems like leaky valves & bad compression.

[Thinking]

Brother if the jerk is there on idle and while your car decelerates (upon leaving the accelerator pedal) it means that any of your engine and gear box foundations is weak.

get your foundations checked and replace the faulty one.

Also get the axles checked. any of the two inner kits might have more than intended play.

[pwuser151508296679]

I couldn't understand what do you mean by "afrs". Appreciate if you could explain.

[pwuser151508296679]

I might have used wrong word for the hesitation/misfiring. It feels like the engine is breathing with a difficulty. This doesn't stay long. As soon as I slightly press the pedal, engine becomes normal. It happens at the time car is stopped and even on high speeds.

[Proverbial_Slang]

Sounds like an Idle Air Control issue. Please get it physically checked.

[sardarg]

I might have used wrong word for the hesitation/misfiring. It feels like the engine is breathing with a difficulty. This doesn't stay long. As soon as I slightly press the pedal, engine becomes normal. It happens at the time car is stopped and even on high speeds.

shortness of breath like suffocating in COVID symptoms, is your vehicle vaccinated for COVID ??

please check for any vaccum tube leaking. there is a thread in which @Xulfiqar sahib explained how to smoke test leakage issues, please search and try that at home.

[affanhaq94]

Do you have a check engine light? Have you scanned it for any issues?

If the cat is still clogged or 'was' clogged, you could always disconnect it or remove an O2 sensor and take it for a drive. If it gets it's power back, you know it's your cat. At least that can eliminate something.

[the_mira_guy_08]

Ah 2jz-fse. Direct injection engine hai. Were the intake ports ever cleaned? They can get clogged with carbon since there is no fuel spraying on the intake valves.

[pwuser151508296679]

No check engine light. Scanned it many times but no fault codes ever appeared. It has four cats and all are properly checked and cleaned during this episode.

[pwuser151508296679]

Yes, the intake ports were cleaned two weeks ago.

[pwuser151508296679]

I couldn't find the video. I'd appreciate if you could share the exact link.