Updated 8-1-09, still misfiring, need help!
Here is the down low: My friend (username Finn on here) has a misfire with his M20. It has a consistent miss under load, and it seems to sometimes cut in and out randomly from running fine to missing, but always misses under a load.
So here is what we did to try to fix the problem:
-Replaced spark plugs
-Replaced spark plug wires
-Replaced distributor cap
-Replaced timing belt
-Adjusted valves
-re-did engine grounding wires
We swapped these following parts off of a perfectly running M20 to try to diagnose the problem:
-MAF sensor
-Coil
-Entire fuel rail, including injectors and FPR
-ECU
What else could it possibly be?? the car ran fine when he got it, and one day it randomly started missing, with no significant event to trigger it. This is pissing me off as much as it is pissing my friend off, and we really want to be able to fix it before he has to bring it to the BMW specialist.
This thread is a very similar problem i believe: http://www.r3vlimited.com/board/showthread.php?t=123558
Here is the down low: My friend (username Finn on here) has a misfire with his M20. It has a consistent miss under load, and it seems to sometimes cut in and out randomly from running fine to missing, but always misses under a load.
So here is what we did to try to fix the problem:
-Replaced spark plugs
-Replaced spark plug wires
-Replaced distributor cap
-Replaced timing belt
-Adjusted valves
-re-did engine grounding wires
We swapped these following parts off of a perfectly running M20 to try to diagnose the problem:
-MAF sensor
-Coil
-Entire fuel rail, including injectors and FPR
-ECU
What else could it possibly be?? the car ran fine when he got it, and one day it randomly started missing, with no significant event to trigger it. This is pissing me off as much as it is pissing my friend off, and we really want to be able to fix it before he has to bring it to the BMW specialist.
This thread is a very similar problem i believe: http://www.r3vlimited.com/board/showthread.php?t=123558
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