I've been working on this 87 325is I bought a few weeks ago, not running, trying to get it running with no luck so far. The in tank fuel pump was bad so replaced that and still no start.
- I have jumped the fuel pumps and both are now working.
- I pulled the fuel line off the back of the regulator and put a bottle up to the regulator to catch the fuel and cranked it and fuel squirts out so I'm as sure as I can be that I'm getting fuel
- I pulled the number 3 spark plug lead and put another spark plug in it and grounded to the valve cover and cranked and it's sparking.
- I swapped out the main relay and fuel pump relay from a running car and no change. If one of those was bad I would assume that I would not be getting fuel and/or spark.
- I swapped the CPS from a running car and no change.
- I checked the voltage at the positive terminal of the coil and it shows about 11.6 or 11.7 with the key in the run position.
- I've checked the timing belt and it's not broken.
- Once or twice while cranking, usually the first crank after sitting for a while, it kind of does a little bit of a sputter but just briefly and doesn't return.
So, I'm not sure where to go at this point. It doesn't crank very hard, could it be a weak starter that's going bad and not turning the engine over enough to start? I have an additional ECU that I was going to swap in and try that but the numbers are different, the one in the car is 0261200153 and my spare is 0261200380.
- I have jumped the fuel pumps and both are now working.
- I pulled the fuel line off the back of the regulator and put a bottle up to the regulator to catch the fuel and cranked it and fuel squirts out so I'm as sure as I can be that I'm getting fuel
- I pulled the number 3 spark plug lead and put another spark plug in it and grounded to the valve cover and cranked and it's sparking.
- I swapped out the main relay and fuel pump relay from a running car and no change. If one of those was bad I would assume that I would not be getting fuel and/or spark.
- I swapped the CPS from a running car and no change.
- I checked the voltage at the positive terminal of the coil and it shows about 11.6 or 11.7 with the key in the run position.
- I've checked the timing belt and it's not broken.
- Once or twice while cranking, usually the first crank after sitting for a while, it kind of does a little bit of a sputter but just briefly and doesn't return.
So, I'm not sure where to go at this point. It doesn't crank very hard, could it be a weak starter that's going bad and not turning the engine over enough to start? I have an additional ECU that I was going to swap in and try that but the numbers are different, the one in the car is 0261200153 and my spare is 0261200380.
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