M42 Fuel issues/ goes from 30 to 0PSI at WOT

[monty23psk]

Could it be #5?
http://www.realoem.com/bmw/showparts...34&hg=61&fg=15

[Bimmian89]

No, thats for the head lights.. So it says..

[monty23psk]

#4 is for headlight. Only one way to find out is to order since it is cheap. What throws me of is that it states quantity 2 for the car.

[Bimmian89]

Problem still persists with a rigged connector, starting to think there is a short in the wire or something. Going to check voltage while driving tonight, as well jump it straight from the battery and drive. The pump is only getting about 11.3 V while idle, stays the same when you rev it. I was thinking the pump should be around 13-14 volts though, is that correct? I sit in the back while my dad drives it and when it starts acting crazy you can hear the pump cutting off and on..