Hello R3v's,
First off love this site, i'm on here all the time doing research, but this is one problem i can't seem to figure out. I got the car about 3 months ago and the problem started 1 month after owning it. I know the PO and he told me that it has never done anything like this at all. The thing ran absolutely perfectly until this point.
My 89 325i has been having random shutdowns essentially where the fuel pump cut outs (I pulled the seat up and heard it cut out) and the tach just slowly moves lower as i am coasting. Most of the time i can just pop the clutch in and let it out x3 or 4 to get it to restart, sometimes im forced to the side of the road. Normally after i park it (And it heat soaks for a while)after driving it will have problems starting up sometimes for up to 30 mins. Sometimes it fires up perfectly normal.
It did have an after market alarm which had been disabled but all the wiring was still attached. It had been for more than a year. And had caused no problems, so i didn't think this was the problem.
First I replaced all the relays(fuel pump and DME relays) no change at all.
then tested the CPS and it ohmed out by the bentley. At this point im going to swap another CPS from a working car to see if theres a change.
Changed fuel filter, and fuel pump. I assumed it was the pump since every time I tested the pump it had 12volts going to it when i jumped the relay. I can even hear my main relay clicking when i jump 36 and 2 on the dme plug. Still same thing... plus i kept hearing the pump shut off. No change.
Swapped ECU with a known working unit. No change.
I was told to check the c191 connector which i was playing around with see if wiggling it would cause anything to happen, which it didn't. The plug didn't look corroded granted the plastic housing for the female end was broken off. Im thinking about getting these
I figure its better to replaced it.
Im starting to run out of ideas here what else could cause this? Im leaning towards something in the wiring harness itself. But its just so random its hard to actually pinpoint where the problem is coming from. Anyone gone through something like this? I want to drive my car again!!
Any advice is appreciated.
First off love this site, i'm on here all the time doing research, but this is one problem i can't seem to figure out. I got the car about 3 months ago and the problem started 1 month after owning it. I know the PO and he told me that it has never done anything like this at all. The thing ran absolutely perfectly until this point.
My 89 325i has been having random shutdowns essentially where the fuel pump cut outs (I pulled the seat up and heard it cut out) and the tach just slowly moves lower as i am coasting. Most of the time i can just pop the clutch in and let it out x3 or 4 to get it to restart, sometimes im forced to the side of the road. Normally after i park it (And it heat soaks for a while)after driving it will have problems starting up sometimes for up to 30 mins. Sometimes it fires up perfectly normal.
It did have an after market alarm which had been disabled but all the wiring was still attached. It had been for more than a year. And had caused no problems, so i didn't think this was the problem.
First I replaced all the relays(fuel pump and DME relays) no change at all.
then tested the CPS and it ohmed out by the bentley. At this point im going to swap another CPS from a working car to see if theres a change.
Changed fuel filter, and fuel pump. I assumed it was the pump since every time I tested the pump it had 12volts going to it when i jumped the relay. I can even hear my main relay clicking when i jump 36 and 2 on the dme plug. Still same thing... plus i kept hearing the pump shut off. No change.
Swapped ECU with a known working unit. No change.
I was told to check the c191 connector which i was playing around with see if wiggling it would cause anything to happen, which it didn't. The plug didn't look corroded granted the plastic housing for the female end was broken off. Im thinking about getting these
I figure its better to replaced it.
Im starting to run out of ideas here what else could cause this? Im leaning towards something in the wiring harness itself. But its just so random its hard to actually pinpoint where the problem is coming from. Anyone gone through something like this? I want to drive my car again!!
Any advice is appreciated.
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