My '88 325i refuses to start. Battery is good, it cranks but it just does not want to start. I have investigated the following:
FUEL System:
- Using 2 wires I connected the fuel pump directly to the battery - the pump ran and delivered fuel (I had a hose with one end connected to the fuel pressure regulator in the engine compartment and the other end in a container to receive the fuel). So the fuel pump is good.
- I removed the fuel pump relay and using a jumper wire I've connected sockets 30 and 87 then I measured the voltage between the terminals in the fuel pump connector - it was battery voltage - good.
- I cranked the engine while watching the hose I had connected to the fuel pressure regulator to see if fuel was delivered. There was plenty of fuel - good.
IGNITION System:
- I tested for spark using a grounded spark plug connected to one of the wires that I had disconnected from one of the spark plugs. There were blue sparks while cranking the engine.
So I have spark and fuel delivered to the cylinders but the car would not start at all... Could anyone please help with a suggestion/idea of what could be wrong? What should I check next? Thanks a lot, Dan