Help needed with fuel pump
#1
Three Wheelin'
Thread Starter
Help needed with fuel pump
On holidays 300 miles away. On the way I encountered a no start at a gas station. Fuel pressure gauge showed no pressure even during cranking. All fuses checked ok and several swaps of the relay with several new ones from Roger did not work. Tried jumper on 30 & 87 terminals and completed trip to destination.
At the relay, #30 has battery voltage and #86 has ignition and cranking voltage. When #87 gets juice the fuel pump runs (as described above), so is the relay missing a ground off the #85 terminal? I traced the grey wire on #85 terminal to the bundle at the bottom rhs of the CE panel.
So what is fed to the #85 terminal at the fuel pump relay to get the relay solenoid to close? I don't want to connect a ground to it without first checking with you folks.
Please and thanks!
Fred
At the relay, #30 has battery voltage and #86 has ignition and cranking voltage. When #87 gets juice the fuel pump runs (as described above), so is the relay missing a ground off the #85 terminal? I traced the grey wire on #85 terminal to the bundle at the bottom rhs of the CE panel.
So what is fed to the #85 terminal at the fuel pump relay to get the relay solenoid to close? I don't want to connect a ground to it without first checking with you folks.
Please and thanks!
Fred
#2
Rennlist Member
Fred,
I hate to be the bearer of bad tidings, but the LH not providing ground to the fuel pump relay is a sign that your LH needs to be rebuilt. It has happened on both LH computers that have gone bad on my cars.
I drove with a long wired switched jumper for the fuel pump for a month until I could get the computers rebuilt.
I hate to be the bearer of bad tidings, but the LH not providing ground to the fuel pump relay is a sign that your LH needs to be rebuilt. It has happened on both LH computers that have gone bad on my cars.
I drove with a long wired switched jumper for the fuel pump for a month until I could get the computers rebuilt.
#3
Three Wheelin'
Thread Starter
Last edited by Koenig-Specials 928; 07-01-2014 at 10:09 PM. Reason: spelling