hi all ,,,

I am working on chevy traverse 2010 .. 100,000 KM only .


the problem is reduce power engine ! white smoke ! smell a gas !

I put my scanner and there is codes :

p2178 system too rich

p0087 fuel rail regulator and p0089 ( low and high pressure codes )

random misfire AND CYLNDER1 and 2 a high misfire detected p0301 and p0305 and one code for injection 1 leaking p029D ,, the car is too heavy and poor fuel economy

I just replace the spark plugs ..

any help ! Ijust stop the car now

Well, if you have been driving the vehicle this way for a long time, you could have created other problems....just guessing, but the fact that you have an injector problem and misfire problem on the same cylinder, could either be an injector or injector circuit problem......

If you have run the vehicle this way for a long time, that rich condition could have contaminated the pre O2 sensor......need to check the fuel pressure too, which could be affected by a bad injector or f/p regulator.....

Thanx tech II

I just bought new fuel pressure regulator , tomorrow i will change it and come here again .

U tell me that the problem From the long millage ? It just 100 K not mile .

Q: does the regulator make the car going in rich system ! Cause my fuel is going out from the rear exhaust !

Well, you will have unburned fuel, if you have a misfire......and you have possible injector/circuit problems.....even possible MAF/O2 problems?

Even at 66K miles, things can happen,.......

So start with what ?

Also there is no code in maf or o2 .. Only misfire is 2 cylinder 1 and 5

And 1 injector code ( cyl 1 )

So we hope to share this issue for all members .. Thanx alot

Very good possibility you have a bad injector. These 3.6s are known for injectors to fail and ignition coils. To verify a bad injector a Active fuel injector tester (Dealer item) is needed to test the injector output.

UPDATE 6:: feb

I was working on problem and i found 3 injection are ( bad ) .. So we change the three injections .

Clean the regulator .. Check all coils .. Spark plugs

Problem is solved for 5 min then reduce engine power again !!!

I check the oil dipstick and there us smell fuel and i guess the is fuel on !!

There is white smoke rear .. Smell gas .. Don know what to do know ?

How did you determine that 3 injectors were bad?

We remove it in machine .. It is bad .. And also the seal is bad

Not sure what "remove it in machine....It is bad", means.....