Hey guys,
Just recently dropped my M30 into my 86 325e and only sparks on cylinder 6. Here are the details of the swap:
M30b35 out of an 89 535i
M20 "i" harness out of 89 325i plugged into ECU from donor motor
New Bremi spark plug wires
New Bosch ignition coil
New NGK spark plugs
Distributor cap and rotor used on my M20 for 5000 miles (relatively new and worked on the M20 perfectly)
I tried to start the car for the first time today and the engine turned over, but only cylinder 6 fired. The car was getting fuel and compression. I tested each cylinder for spark by removing a spark plug and turning the car over to see if it sparked, only cylinder 6 sparked. I tested the other wires and they all fired when plugged into the 6th port on the distributor cap. I tried testing the distributor by using the one I removed from the M30, but the same issue persists. The distributor cap and rotor from the M20 and M30 have the same part numbers via RealOEM. I did not get a chance to try the old M30 rotor as I could not find it.
I am thinking it may be the rotor not making contact with the cap for each cylinder (and only cylinder 6), but I am not sure why this may be. The issue may be something completely difference, I am completely stumped as I have never dealt with an issue where only one cylinder fires. Any help is greatly appreciated. If you need anymore information to help me diagnose, I will be happy to share.
Thanks,
jdance30
Just recently dropped my M30 into my 86 325e and only sparks on cylinder 6. Here are the details of the swap:
M30b35 out of an 89 535i
M20 "i" harness out of 89 325i plugged into ECU from donor motor
New Bremi spark plug wires
New Bosch ignition coil
New NGK spark plugs
Distributor cap and rotor used on my M20 for 5000 miles (relatively new and worked on the M20 perfectly)
I tried to start the car for the first time today and the engine turned over, but only cylinder 6 fired. The car was getting fuel and compression. I tested each cylinder for spark by removing a spark plug and turning the car over to see if it sparked, only cylinder 6 sparked. I tested the other wires and they all fired when plugged into the 6th port on the distributor cap. I tried testing the distributor by using the one I removed from the M30, but the same issue persists. The distributor cap and rotor from the M20 and M30 have the same part numbers via RealOEM. I did not get a chance to try the old M30 rotor as I could not find it.
I am thinking it may be the rotor not making contact with the cap for each cylinder (and only cylinder 6), but I am not sure why this may be. The issue may be something completely difference, I am completely stumped as I have never dealt with an issue where only one cylinder fires. Any help is greatly appreciated. If you need anymore information to help me diagnose, I will be happy to share.
Thanks,
jdance30
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