Fuel problems AGAIN!
Thread Starter
Instructor
Joined: Mar 2017
Posts: 193
Likes: 13
From: Florence SC
Fuel problems AGAIN!
Having fuel pump problems again. I replaced the fuel pump a little over three months ago. A week or so ago I backed it out of the carport and it would not crank to put it back. I went and got another pump to change and then return the defective one. I tapped on the filler neck and it cranked and ran great. Sometime it will crank but mot of the times not. I bought a fuel pressure test gauge to check the pressure. When I removed the cap from the schrader valve and pushed the valve in gas tricked out. I hooked up the gauge and turned the switch on. No pressure registered. I went ahead and tried to crank the car and it started. I was running about 35 psi of pressure. Turned it off no crank. Before I replace this pump again what should I be looking for.Can't hear the pump running when switched on. Ideas? Sorry for the long post.
Melting Slicks
Joined: Jul 2005
Posts: 2,649
Likes: 863
First off- that's not a long post...
To me - it sounds like an intermittent electrical problem. It could be the pump connector, it could be a ground connection - or it could be something internal with the pump. I'd start by checking the most accessible stuff first - IF you do pull the pump - go over everything including the wire itself carefully.
The silver lining here is that the pump comes out a LOT easier than a C6 pump does !!!
To me - it sounds like an intermittent electrical problem. It could be the pump connector, it could be a ground connection - or it could be something internal with the pump. I'd start by checking the most accessible stuff first - IF you do pull the pump - go over everything including the wire itself carefully.
The silver lining here is that the pump comes out a LOT easier than a C6 pump does !!!
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,320
Likes: 3,927
From: Cape Coral, Florida
C5 guy here...a little slow on the C5 site...I’d do a voltage drop check on both the power and ground side of the fuel pump circuit while the pump is under load (running or cranking)...should be less than .5 volts !!
Race Director
Joined: Oct 2008
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From: Lansing MI
