no start issue

[e23inco]

I have had hard starts the past month or so, now I can not get my 86 735i euro 5speed started at all. it just turns over. It is getting colder, but I am not getting any fuel to the engine.

i did a few fuel tests, as in removing hoses in engine bay (no fuel came out when trying to start). I moved back to the fuel pump and filter - no fuel coming out when i disconnect the hoses and try to start.

Last summer, I replaced both the fuel pump by the filter, and the filter and it ran fine. I also replaced the in-tank with the 'fix' pump, since the original pump is no longer available.

I swapped the relay, also swapped another fuse - no difference in the car not starting.

Any ideas? Shouldn't a Bosch fuel pump last more than a year? If the in-tank is not working/faulty, could that cause the main pump to burn out quickly?

It did drive better (i was having hesitation issues) until now.

Thanks.

[Hit Man X]

Did you also check for spark? How about injector pulse?

Jump the fuel pump relay and check for voltage back there.

Last I recall the Motronic closes the FP relay during cranking. Possible one your reference sensors shit the bed. Mine just fell apart on the 11/84 745i.