has a new o2 sensor and coolant temp sensor. car runs fine but its fouling out plugs and thining the oil to the point where if I put 40 weight oil in it 3 days later its so thin that the lifters are ticking. And needless to say it gets shitty gas mileage.

Where should I start my troubleshooting? Im not sure where to look for the problem. Oh and the check engine light is not on.

 

is it loosing oil or just thinning oil -- how many miles on engine-- is it running hot-possible blown headgasket-- need more info

 

is your check engine light on?

 

massive blow by? are you burning oil too? that causes HC's/ rich condition too. check for leaky injectors. Are your plugs in the right heat range?

 

i had an injector stuck open.ran like ass low rpm's screamed in the higher rpm's

 

loosing and thining

probably around 90,000 or so the engine is a 96

does'nt run hot at all runs at around 130-160 Im putting a thermostat in it to get it to run at operating temp faster. but it ran rich before I took the thermostat out.

 

read my first post again

 

yeah it burns oil pretty bad but I think the blow by is from the rings getting washed with fuel. I ran some 2 cycle in it and it helped some but I need to find the actual source of the problem

 

I think Shadytrickstah111 is right. Sounds exactly like a stuck injector. If it was something that effected all cylinders like a vacuum leak, sensor, or FPR, the car would run like ass. A stuck injector would only effect that cylinder. Couple that with the huge ammount of fuel needed to thin oil (daaang!!), and the only thing I can think of that fits the bill is a stuck injector.

 

I'll check them.