85 325es won't run
hello everyone. Ok. I have tried, time to get some help. She will run occasionally. When she does run, it backfires repeatedly from 1200 to 2400 rpms straightens out but struggles to stay up in the rpms. When driven now she can't rev over 3000 in gear, starts to break up. But now, she won't even bump over. If I crank and crank and crank she will pop a little bit.
When I bought her, the following has been replaced
Fuel pumps, tps sensor, fusable link for fuel pumps, fuel lines, fuel filter, all relays and fuses (except main and I don't know where it is), ECM (I guess the larger one??) plugs, wires, cap and rotor, air filter, ICV, and thats about it.
When I first picked it up, I had it running just by cleaning the relays and putting it all back together. That lasted a week.
It has excellent spark, especially when someone cranks it before you can get your hand off the screwdriver in the plug wire. I cut the cat out because the original owner said that it was plugged up, didn't help.
I was also told the cold start injector was bad but I removed the fuel line and sensor plug and still no fire.
Another possible problem is the vacuum line that goes to the fuel pressure regulator on the fuel rail, when unplugged doesn't make a sucking noise and no pressure when I put my thumb over the hose, I disconnected it from the manifold and still no vacuum pressure (out the manifold).
This is kinda why I hate other people's projects. Any help anyone can give would be greatly appreciated.