Has anyone had a problem with their engine after tuning the computer?
I seems to get worse when the a/c is on..... but when im just driving around with the rpms up it doesnt do it. Any opinions with cause of my problems. Im thinking its a coil problem or maybe a lifter problem. Hopefully someone can also tell me some tricks to find out what the cause of it is.

 

went from the aftermarket to the stock spark plug wires to see if any change but nothing it still does the same thing..... it sounds like a mis but only when im at stand still like at a red light or a stop sign.

 

New plugs? Does the check engine light flash? if so Autozone will read codes for free. That would be a start. next depending on answers would lead to moving coils plugs and injectors around to see if the misfire moves too, But first we (you) need to see if it is a random misfire or a cylinder specific...

 

im having the same problem it only does it when its idling i changed the plugs wires everything idk what it is the check engine blinks when it does it

 

mine did it 2 . . .after a tune. some people say cus of the DOD lifters other say DOD injectors...check out the codes , to see if its random misfires

 

well i checked with my friend that tunes and it didnt pull any codes and then i changed the plugs and the wires and still the same thing

 

yea mine doesnt throw any codes i changed the plugs and wires to i was lookng at it today and i had like 4 intake bolts that werent even tight i tighten them and it did it once for like 5 seconds and hasnt done it yet so far so hopfully that fixed it

 

if no codes, it could be fueling related...

 

When it was "tuned", were the engine mis-fire diagnostics parameters changed? The pcm may be ignoring the mis-fires because the count isn't high enough to trigger the code.

 

im not sure if it was changed i can ask my buddy if it was but it never did it with my other motor in so i dont see how its a fuel problem unless one of the injectors is dirty