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Rough idiling. Sputters but wont stall when put in drive. Computer said mis fire on 4. Changed coil and plug. Computer shows nothing now. Same problem.
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Cylinders need 3 things to fire. Fuel/air, compression and spark. The codes say 3 & 5 are misfiring. Normally one starts with confirming you have good spark. If the plugs are good, as in don't have to many miles on them. Then you may need to check the coils. If it will run at all, I would then swap those 2 coils with 1 & 4. Reset codes. Run it until the CEL come on and see of the codes follow the coils, if so replace them. If it wont start at all, check for proper fuel pressure, because it should start and run rough if only 2 cylinders are mis-firing.
I have had this problem before , and coils work or dont work , your mis fire is dirty fuel injectors run a can of fuel cleaner with high octain fuel , on some high way drive , should clean it out , thanks
you mite want to change the distributor cap or it might need a quick tune up if the distributor is damaged then it wont always spark properly witch is why u will get full 200psi if it is a continuous put put put then i would suggest getting it tuned
a rough idle/high idle is indicative of a malfunctioning TPS(throttle position sensor) this is located on the throttle body ,is attached with (2) screws/bolts to the throttle body housing right off the butterfly shaft. it has either 2 wire or 4 wire plug. the replacement part can be purchased at locale auto parts store. I would also agree that a full service and tuneup be done. this will help with performance and will increase the fuel efficiency. please rate this...thanks
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