2CarPros - Car Questions & Answers

2001 BMW 325 Repair Question


Topics covered: Fuel pump, Spark, Engine.
Mileage: 124 miles.

Asked on April 4, 2011

Won't crank

2001 BMW 325 Won't start turns over but won't fire. Battery is fine 12.6 volts pulls down to 10 volts to crank, returns immediately to 12.6volts.I can smell gas and hear the fuel pump running while trying to crank, and have used starting fluid to try to fire it. Was running just fine when I parked it yesterday to install all new brakes and rotors, never touched anything except necessary brake parts AT WITS END!!!
Avatar Asked by justcr01

Answer

Replied on April 4, 2011

Do below to determine if its fuel or spark problem

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 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, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if okay-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,cap and rotor,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing

Tiny Answered by rasmataz
68 questions asked