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1990 BMW 525 will not start

Tiny
LEO
  • MEMBER
  • 1990 BMW 525
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 216,000 MILES
My 1990 525 bmw will not start, it has an electrick fuel pump in the gas tank that I can hear running. It is getting fuel to the carabuator, I removed the hose and turned the key and saw it pump out. It turns over fast enough to start, It just keeps on spining. A friend said it could be plugs and/or wires, I say it could be but it should still try to crank up. I drove it to work this morning with no problems, This evening ten hours latter it will not start. Thanks in advance. Leo
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Tuesday, March 16th, 2010 AT 7:33 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Cranks but no start condition:

Fuel and Spark:
Get a helper disconnect a sparkplug wire or 2 and ground it to the engine at least 3/16 away from ground -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it.
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Tuesday, March 16th, 2010 AT 7:53 PM

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