Fuel pump relay buzzes? No start. CIS-E
03-23-2012 05:03 PM
89 GLI CIS-E 16v
Replaced the relay and no change. Have swapped to known working: coil and ignition module. I am getting spark to the plugs. This happened quite randomly when I was making a standard left turn.
I am quite sure its an issue with fueling. I just have not gone through the troubleshooting of the fuel system. (Sat over winter, not very motivated with a gravel driveway).
I can hear the pump running despite the relay buzzing. I have also bypassed the relay at the fuse box and this does not change anything. I am thinking a bad ground wire somewhere?
Why would the fuel pump relay buzz? Undervolt protection?