No start!!!

[kansas-ix]

Need help here my daily driver m42 wont start checked ignition and everything is fine. So it is a fuel problem, I get no sound from the fuel pump when i turn the ignition on.

where is the fuel pump relay?
anything else i should check?

Any input helpful need it back on road by monday at the very latest.

[Hick]

Remove the head :roll:

M42s dont run fuel pumps until the car is cranking, there is no 'prime'

Check the most common issues; Crank Reference Sensor, Coil pack, Throttle Postition Sensor

[kansas-ix]

fuel pump is the problem so solved. Need cheap fuel pump anyone?

[strad]

Remove the head :roll:

M42s dont run fuel pumps until the car is cranking, there is no 'prime'

Mine runs briefly when ignition "on," before "start." Whether this is correct operation or not, I don't know, but I'm damn sure it's the fuel pump making the noise, and I have no running or drivability issues, so I dunno?

My M20 doesn't do this, I know that for sure.

[Justinian]

Mine runs briefly when ignition "on," before "start." Whether this is correct operation or not, I don't know, but I'm damn sure it's the fuel pump making the noise, and I have no running or drivability issues, so I dunno?

My M20 doesn't do this, I know that for sure.

My M42's fuel pump definitely primes when ignition is "on" before "start." Can really hear it if the back seat is off.

[mattdk318i]

this sounds strange but i think early build 91 318s had the priming fuel pump, Because my slightly newer(months) 318 doesnt prime but runs fine too.

[kowalski]

mine does it on and off, its a relay thing that i haven't quite figured out yet because if you ground out the afm then it will start priming...

[buhnahnuh]

mine primes, better hope coil back isnt dead $$$ unless you can find used

[E30nate]

i would go with this. if you havnt found the problem yet, check your relay and your crank reference sensor. i havnt had my 318 very long, so i dont know if they have the crank sensor, but on my 325is this went out and drove me nuts for six months. i finally sold it and the guy fixed the same day.

this sounds strange but i think early build 91 318s had the priming fuel pump, Because my slightly newer(months) 318 doesnt prime but runs fine too.