Hello, I want to present the following problem, the engine of my Camry 2.2 from 2001 runs irregularly above +/- 1800 rpm.It feels like there is some imbalance in the wheels of the car.
During the ignition check it appeared that the spark plug of the 3rd cylinder works irregularly.
I replaced the spark plugs, spark plug cables and ignition coils without a positive result.
Can you tell me what a possible cause can be ?
Camry 5fse
2.2 automatic
2001
300000 KM (186000 m.l)

thank you in advance.

Rob Wapperom
(from the Netherlands)

 

You sure its the engine and not issues such as imbalanced or bad tires?

Automatic or stick transmission?

Any issues with engine idle?

Has the MPG dropped?

 

Hi Joey, thanks for your reaction.
my tires are not the problem.
When I drive at low speed, its minimal.
While I driving between 80 and 110 Kmh (49-68 mile's) it is very noticeable.
I have tested all 4 spark plugcables with a timing light, and the light image of the 3rd cylinder is irregular, the other have a regular pattern, even at increased rpm.
Sometimes the engine spontaneously starts to stutter and hold back, when I change fuel (from LPG to petrol) it drives as it usually does, still runs irregularly but no longer stutters.
When I stand still the tatchometer bounsing a little over+/- 50 RPM, I checkt the idle air control valve and it seems to be good.
The engine management light rarely lights up for a moment,

What do you mean with (MPG dropped?)

I hope that this information will help.

Regards, Rob Wapperom

 

Has your cars miles per gallon dropped?

Swap out another coil and plug with No 3. Determine if the irregular problem moves with the coil and plug.

 

Hello Joey,
the miles per gallon are the same as before. 8.5 Km on 1 liter = +/- 17 mille on 1 gallon I think its normal.
Last week I renewed all ignition parts without result ?

Regards Rob Wapperom

 

Even if new coils swap one cylinder coil with No 3. Determine if No 3 still has the same issue or the problem has moved with the swap. New coils can be bad.

 

Joey, placed another coli but no changes. ( the old working one)

Regards;
Rob Wapperom

 

LPG mode bypasses the injectors?

 

the engine responds to both fuels, only LPG is slightly worse.
Both fuels have their own injectors.
Why do you think that an irregular spark can be related to the fuel system?

Regards;
Rob Wapperom

 

Typically these issues are either fuel or ign related. If the LPG system bypasses the gasoline injectors and the engine still has issues, this should eliminate the gasoline injectors as a problem.

Any vacuum hose or intake manifold leaks?

How is the 12V wiring to the coils.

Install an old known good ign wire on No 3 cylinder.