Hey guys. I've got a 9/95 540i/6.
It's got a crank, pop, backfire and starter drag but no fire up/idle or run. I picked the car up this way. The previous owner said that the car ran before the water pump died, he pulled the battery and when he was done and plugged everything back in he had no response from the ignition key.
So far I have changed, replaced:
484 to 404 DME (with ASC copy chip), bypass EWSII and cut pin 66.
New NGK plugs
New 340lph fuel pump
Crank position sensor
Cam position sensor
Reman Bosch II injectors
I've made sure the fuel pump relay and DME relay have power and are functional. The spark plugs are getting fuel soaked, so fuel is finding it's way to the cylinders. I can see that the DME relay clicks on with key on, cycles a few tests (ie; injectors , etc) and then turns off a few seconds later. Normal I would presume?
I added a bit of 30w oil through the spark plug holes to see if a bump in compression could promote a light off, it sounded promising but still just kicking and backfiring without a fire up. Since adding compression was the most reaction I had from the engine I was convinced this engine was toast and I started location a M62B44 for replacement. I then dug out the compression gauge and found that every cylinder had an even 150psi, albeit it took 7-8 cranks to get there each.
I've got .02Ω resistance on the outside pins of each ignition coil and 1.8kΩ on each coil boot.
If this were my old race small block chevy with a Demon carb and MSD distributor I would say ignition timing is way off in no mans land and a simple set TDC and reset the dizzy would fire it up.
In order to change the water pump the previous guy would have needed to pull the harmonic dampener correct? Theoretically there would be a dowel pin in the crank hub as so not install the crank trigger wheel clocked wrong? I've got a new dampener on order, but for now it's worth a check.
Can you guys suggest anything else? If I can get this car up and running I will not have considered the new parts a loss but rather part of the restoration.
Cheers ~Mykk
It's got a crank, pop, backfire and starter drag but no fire up/idle or run. I picked the car up this way. The previous owner said that the car ran before the water pump died, he pulled the battery and when he was done and plugged everything back in he had no response from the ignition key.
So far I have changed, replaced:
484 to 404 DME (with ASC copy chip), bypass EWSII and cut pin 66.
New NGK plugs
New 340lph fuel pump
Crank position sensor
Cam position sensor
Reman Bosch II injectors
I've made sure the fuel pump relay and DME relay have power and are functional. The spark plugs are getting fuel soaked, so fuel is finding it's way to the cylinders. I can see that the DME relay clicks on with key on, cycles a few tests (ie; injectors , etc) and then turns off a few seconds later. Normal I would presume?
I added a bit of 30w oil through the spark plug holes to see if a bump in compression could promote a light off, it sounded promising but still just kicking and backfiring without a fire up. Since adding compression was the most reaction I had from the engine I was convinced this engine was toast and I started location a M62B44 for replacement. I then dug out the compression gauge and found that every cylinder had an even 150psi, albeit it took 7-8 cranks to get there each.
I've got .02Ω resistance on the outside pins of each ignition coil and 1.8kΩ on each coil boot.
If this were my old race small block chevy with a Demon carb and MSD distributor I would say ignition timing is way off in no mans land and a simple set TDC and reset the dizzy would fire it up.
In order to change the water pump the previous guy would have needed to pull the harmonic dampener correct? Theoretically there would be a dowel pin in the crank hub as so not install the crank trigger wheel clocked wrong? I've got a new dampener on order, but for now it's worth a check.
Can you guys suggest anything else? If I can get this car up and running I will not have considered the new parts a loss but rather part of the restoration.
Cheers ~Mykk
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