What could be wrong - BMW Forum

94325is · 04-08-2007, 04:44 PM

My 94 325is had been running fine. I parked it on a sunday afternoon, and when I came out to go to work Monday morning, it will not start... there was no indication of a problem prior to it not starting... I have no idea where to start troubleshooting... It turns over but will not catch... any suggestions as to where to begin would be appreciated...

kmf60 · 04-09-2007, 08:21 AM

Fuel Pump!

Criminal · 04-09-2007, 09:38 AM

Check the battery and spark plugs first.

94325is · 04-09-2007, 05:54 PM

Quote:

Originally Posted by Criminal

Check the battery and spark plugs first.

It turns over so the battery is fine, and the plugs are relatively new...

94325is · 04-09-2007, 05:55 PM

Quote:

Originally Posted by kmf60

Fuel Pump!

I was leaning towards the fuel pump myself...

paco1076 · 04-11-2007, 11:51 AM

Start with checking all of the fuses for the fuel system. Sounds like a fuel related issue... How many miles on the car?

Hamfisted · 04-11-2007, 07:20 PM

Yep check the fuel pump fuse (#18) first, if it's good check the relay (you can use a fused jumper wire to make the fuel pump run... If the fuel pump won't run when you jump across the relay slots (87 & 30?) then the fuel pump is bad. If the fuel pump runs when the relay is jumped the relay is bad.
Loosen the fuel line going into the injector rail so you can see fuel shoot out if the fuel pump comes on during the test.
This is all covered in the Bentley manual.

-Mike

thekid · 04-11-2007, 10:58 PM

I've had some problems with my injectors in the past. The car won't start, let it sit for abit come back, starts but idle will be terrible etc. It does sound fuel related, not necessarily the fuel pump but it is a good place to start.

94325is · 04-12-2007, 08:29 AM

Thanks everyone... Fuses and relay are fine... fuel pump does not run, although there is voltage to it... so I have a new one on order from oembmwparts...

94325is · 04-14-2007, 12:06 PM

Received the new pump Thursday... Got it installed this morning... took awhile to get it going, but it sounded like it wanted to start from jump after replacement... I'm supposing it needed priming... anyway after some fudging around with it, I did get it going and had it out for a short road trip... so it looks as if I'm back in business.... thanks for the input...