m50 turns over but wont start. Fuel problem?

[Oz10]

Bad cps IM shocked know ones said that yet.

I'll try replacing that as well. The shop I work at has a e34 parts car so I can snag it off of that.

[Oz10]

Any idea what this plug is? And is it important? I is near the DME coming from the m50 wiring harness

[Oz10]

So I replaced the cam sensor today and I haven't noticed an improvement. I'll try to get the crank sensor swapped out tomorrow. I sprayed some starting fluid in the intake manifold and went to crank the car and it tried to start up. One of the techs at work said that he's seen BMW's do this before with no spark. Has anyone else heard of this happening?

[evil_twin]

Why don't you do the pedal dance and see what codes pull up before you just start buying parts?

[Oz10]

Why don't you do the pedal dance and see what codes pull up before you just start buying parts?

What do you mean by pedal dance? I haven't spent any money on parts, I've got a parts car to pull from at my work. I'll run codes tomorrow thats a good idea.

[evil_twin]

eh, pedal dance is the turn key on, stomp gas pedal 5 times within X amount of seconds, then read codes.

[Oz10]

Oh okay got ya

[tweetyoost]

So I replaced the cam sensor today and I haven't noticed an improvement. I'll try to get the crank sensor swapped out tomorrow. I sprayed some starting fluid in the intake manifold and went to crank the car and it tried to start up. One of the techs at work said that he's seen BMW's do this before with no spark. Has anyone else heard of this happening?

I noticed this aswell. I tought my spark plugs are firing but you can only be sure if you but one coil out, tape a spark plug to it and ground it. If you see sparks.. it does work..

[Oz10]

Just switched out the crank position sensor. Still nothing

[monkeytaco]

This entire thread sounds like a wiring adaptor problem. I'd go over your connections pin by pin to verify they are correct.

I have an m50nv manual harness from a 92 325 in perfect shape if you need it. $100 shipped.

[328ijunkie]

Crank Pos sensor and ECU relay are the two things that usually cause no spark no fuel.

[tomgt325]

I am in the exact boat right now and in the middle of testing the same things. Good luck, and I'll post up if I find a solution.

[Oz10]

This entire thread sounds like a wiring adaptor problem. I'd go over your connections pin by pin to verify they are correct.

I have an m50nv manual harness from a 92 325 in perfect shape if you need it. $100 shipped.

I don't think its the harness thats the problem. I'm thinking its probably the adapter.

Crank Pos sensor and ECU relay are the two things that usually cause no spark no fuel.

I've already tried both of those. :(

I am in the exact boat right now and in the middle of testing the same things. Good luck, and I'll post up if I find a solution.

Good luck man, let me know when you find out what's wrong with yours.

[328ijunkie]

Have you tried hardwiring the fuel pump and ECU relays?

[Oz10]

Have you tried hardwiring the fuel pump and ECU relays?

I hardwired the fuel pump relay. I guess I can try hardwiring the ECU relay at the same time and see what happens. I can get the fuel pump to run if i hardwire the relay, but the injectors aren't working.