1987 325iC Won't Start - Lots of parts replaced

[dinanm3atl]

I am starting to lean towards injectors, faulty wiring there somewhere. From what we have replaced it would seem we may have a problem there.

I will have the owner swap the FPR just in case. I just don't think 6psi over is causing the car to not run. It does not reak of fuel when it is trying to start and we don't even get so much as a sputter or a mis-fire.

[jlevie]

On the assumption that the fuel pressure check was done by tee'ing in a gauge at the inlet of the rail so that the FPR is part of the fuel system... While 50 psi is a bit over spec I think the engine should fire if it isn't flooded.

You have spark from the coil (do you have it at a plug?) and I presume the fuel pressure measurement was done while cranking over the engine. That being the case, the DME main & fuel relays, and CPS aren't your problem. The next check I'd do would be to see if the injectors are firing. Unless the harness has been changed, this car should not have a C191 connector, but there still could be a fault in the wiring to the injectors.

[strad]

6psi over spec? I was told 50psi and friend said Bentley spec'd 44 so it should be fine.

Forget about what Bentley or any other source says. The correct FPR has its rating printed right on the housing. It says 3 bar. 3 bar is 44 psi. So if your FPR is allowing 50 psi (and you trust the gauge) the fpr is faulty. And the car is getting too much fuel.

Another thing. If you have fuel pressure at the rail, you can rule out the fuel relay. The fuel pump is running, otherwise you wouldn't have pressure.

[oekundar]

Fuel Pump relay....that was my problem and similar symptoms...the main one and the fuel one are the same type of relay, but it certainly sounds like its one of those.

[dinanm3atl]

50 psi is significantly out of spec. It should be 3 bar, which is about 44 psi. I don't know if that would cause it not to run however.

6psi over spec? I was told 50psi and friend said Bentley spec'd 44 so it should be fine.

I had this same exact shit.

Does it crank and crank, or completely dead in the water? Interior lights come on when key is in ON position?

I will find out. I know it just cranks and cranks and cranks.

alternator

Doubt it. It can crank and crank and crank.

Main relay.

Trying this. It is my friends car and I told him to try this.

[strad]

50 psi is significantly out of spec. It should be 3 bar, which is about 44 psi. I don't know if that would cause it not to run however.

[kronus]

I had this same exact shit.

Does it crank and crank, or completely dead in the water? Interior lights come on when key is in ON position?

[thereisnoyun]

alternator

[romeomike]

Main relay.

[dinanm3atl]

1987 Grey Market 325iC - Will not start or run.

First problem occured while camping. While driving to leave it simply shut off while we were moving. At that point we could not hear the fuel pump going. It eventually fired and ran for 2 weeks, including driving back home from Tenn.

Now it is 'dead'. We have swapped the coil, swapped cap and rotor and distributor. Swapped ECU and put in a new crank reference(was slightly out of spec per Bentley Manual).

There is spark from the coil to the distributor. 50psi is obtained on the fuel rail so it would seem the fuel pump is working and you can hear it.

Swapping the wires as a whole now just in case. Tried 2 different set of new plugs at this point.

What to try next or where to potentially look?