DirtE30 - 1990 BMW 325i

[Senor_Taylor]

Okay, pulled the plugs and they looked like this. All were fouled and #1 was bent? Not sure when/how that happened but it doesn't bode well.



Replaced those with the most suitable bosch plugs at Advance. Still no start.

Tested Spark and I've got it but it's an orange/red spark, which doesn't seem right. I'm fairly certain it's supposed to be blue, but that may have just been because of what I was grounding it to not being good.

There is fuel pressure at the rail and I double checked the fuel line routing from the tank to the rail.

Checked the resistance from the CPS and it looked correct, but that's not always indicative of it working correctly. Pulled all of the relays and sanded/cleaned the pins. Swapped a few around, no luck.

Chased wires looking for shorts, missing grounds, or pins pulling from connectors, nothing.

Checked the oil and it isn't milky so I don't think I've lost compression from a blown headgasket.

Checked the voltage at the battery and it was 11.85, likely due to all of the cranking. One thing to note, the starter did not make any bad noises, no loud pop, and none of the usual clacking it does when I turned it over without the spark plugs in.

It is so odd that it refused to start like this after replacing two vacuum hoses and some fuel lines. It has to be related but I don't know what else to look at in that regard.

I need some help pushing it, but a push start could be another test we use. If that doesn't work, I guess I'll charge the battery and order a new CPS and Main Engine Relay. I'd rather have some evidence to suggest they are faulty before I spend the money, though. After that, I guess either the ECU would be fried or something like that. I guess I'd test that. do a compression test and fuel pressure test or something.