1987 audi 5000cs intermintent start Fuel pump

Huw Powell audi at humanspeakers.com
Sat Jan 2 14:37:22 PST 2010



audifan4evr at aim.com wrote:
> hello i have a 1987 5000cs. my problem is that i am not getting power to my fuel pump all the time. for instance it will take two to four times of on off start before i can here my fuel pump run. when this problem first started we did not have spark either. but i am assuming that is because of the pump not being powered. i have ran every single electrical test in the book and everything checks out. i also swapped distributers,crank case sensors, ecu's and many many other things including the ignition switch. i do have a bosch 044 fuel pump and a fuel cell in the trunk. baiscally my question is does anyone know what controls the power sent to the fuel pump. the original wiring for the original pump now goes to the inline Bosch pump. i have been stumped for weeks and have found nothing. please help
> _______________________________________________

The fuel pump relay controls power to the pump, and, I think, the ECU. 
It terminates power to the pump if it sees no spark signal on the wire 
from the coil to the tach.

Check the ground on the intake manifold if there is one.

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/


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