Quote:
Originally Posted by s54fanatic
Hi I have an E90 n54 rwd with about 180k kms or 112k miles. Recently it started shaking at lower rpms in first gear when im taking off from a complete stop and it will misfire in wide open throttle. if I press my throttle about 25% it wont really shake but if I go half way or wide open i feel my car shaking and it I feel it coming from my rear wheels. I don't get any engine code or anything from the stutters at lower rpms. I did however have a similar issue when I had my mhd Stage 1+ tune. if I applied more than half throttle under load I would feel the engine stutter and my rear wheels would shake. I would also get a code and specifically cyl3 would be misfiring so I'd pull over clear the codes and all good. I figured I shouldnt have any stage tune if I havent finished all my preventative maintenance so I took the tune off and it'd no longer misfire. Its been about 4 months now and it shakes at lower rpms in first gear and also wide open throttle. I believe the sparks were done by the previous owner at 130k or 140k kms. Could it just be my sparks? or could it be something else? I've tried to look in other forums but couldnt find anything. someone mentioned that sometimes the misfire will be felt in the form of a shake from the wheels.
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So the spark plugs were changed over 40k miles ago?
They are due for a change, you can leave MHD installed with Stage 0 stock. map. Misfires don't go away if tou just clear codes. They are typically caused by plugs/coils or injectors. Start with the cheapest plugs and coils, swap to q different cylinder to help identify which is failing. Personally at that mileage I'd change all 6 plugs and Coils.