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Re: engine check light is on
Does the car buck on the highway when accelerating under a slight load?
i owned one of these exact cars,3.8 litre.
2 problems. one,the baffles braek in the gas tank,and if you run 1/4 tank or less it will stall in a turn.
mine it was a right turn.
2nd problem,the EGR valve was stuck and it would surge or "buck" on the freeway.
replaced the egr (exhaust gas return)valve and it ran like new.
if the egr valve is code 42,(i do not have the manual in front of me) you have found the problem
check the egr,it can cause the problems you have.
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When it stalls out, if it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs. A spark tester from the auto store doesn't cost much, you can carry it in your glove box. If the engine is hot, wear gloves.
With temp issues check the coolant temp sensor. How long since a tune-up, I'd also want to check fuel pressure. Check for applicable trouble codes. Your obd1, you should be able to check codes, yourself. You use a jumper wire between the A & B terminals at the data link connector, usually lower edge of dash between steering column and driver door. Turn key just till the dash lights come on, no further. The mil on the dash starts flashing, you count the flashes to get the codes. Your looking for two digit codes.
Umm there is no engine idle screw on those type of vehicles.. If you are having problems with your idle then check the TPS(Throttle Position Sensor)sensor which is usually located on top of the intake..
Well, in my 1989 Olds 88, the oil filter is just above the right swingarm for the wheel. It's an interesting reach from underneath, and the oil drips directly onto the frame of the car, but that's where the filter should be.
I believe they use the same 3800 (3.8L V6) engine up through 1997 or 1998...so you should be able to find it there. Hope that helps!
If everything else checks out Ok in the ignition system (electrical) and if the engine and transmission turn freely,that sound like you might have starter drag.Check to see if you have good connections at the starter.I know its new but check your battery for 12 volts,good connections,ect.