problem with fuel pump relay (Full Version)

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problem with fuel pump relay

  

brerobx -> problem with fuel pump relay (7/17/2007 9:02:33 AM)

I have a 1997 Chevy 1500 pickup, 4wd, 5-speed manual w/ a 305.  About two months ago, the truck wouldn't start, and I figured out that the fuel pump wasn't turning on.  When I opened the relay box, I noticed that the plastic casing fuel pump relay, as well as the plastic on the relay box itself, showed signs of heat damage at one of the connectors.  I bent the prong so that it would make contact, and the truck started up fine and ran for two months with no problems.  Yesterday, same problem.  Fuel pump wouldn't turn on.  I replaced the relay, and it still only worked intermittantly, and the engine had no spark.  I tried everything, and finally what I found to work was hot wiring the positive terminal of the battery directly into the ignition coil.  Once the engine was running, I disconnected the wire from the battery terminal and the truck ran with no problems.  Today, it died on the way to work.  I noticed that the relay was extremely hot.  Once it cooled, the truck would start but the engine would soon die and the fuel pump would not turn on.  After sitting for a few minutes, it will start again, but will die pretty quickly. Any ideas?

  
fresno99 -> RE: problem with fuel pump relay (9/2/2007 3:10:01 PM)

I have the same problem with 1997 chevy 350 pickup. Fuel relay burnt around one prong, very hot, fuel pump won't run. I can change relay and the pump will run again. I can reuse the hot relay after it cools down. Any soluitions? Thanks,

yourneighbor -> RE: problem with fuel pump relay (9/11/2007 9:18:12 PM)

I have a 94' Silverado and pulled the fuel tank today.  Replaced relay, fuse looks good, still won't start.  Will put in new pump tomorrow.  Truck refused to start yesterday, then ran this morning with no problem.  Then wouldn't run again. 189,000 miles could probably use a new pump anyway.  I'll let you know how it turns out.

yourneighbor -> RE: problem with fuel pump relay (9/11/2007 9:21:19 PM)

One more thing.  When I replaced my relay there was some corrosion on the screws that secured it.  This might be the problem with yours.  It may be interferring with your ground which would lead to the relay heating up.

fresno99 -> RE: problem with fuel pump relay (9/14/2007 12:53:40 PM)

I change the wire and prong coming into the fuse/relay box that connected the one prong that was getting hot on the fuel pump relay. So far all is working well. Good Luck

ONECRAZYJEEP -> RE: problem with fuel pump relay (9/20/2007 7:54:21 AM)

MY UNCLE IS HAVING THE ALMOST THE IDENTICAL PROBLEM. HIS 01 SILVERADO 1500 WONT EVN START THOUGH, BUT WHEN HE WIGGLES THE WIRES TO THE FUEL PUMP IT WILL START FOR A FEW SECONDS THEN DIE. SO I THINK HES GOING TO REPLACE THE PUMP. THE NEW PUMP IS ABOUT 500 SOME DOLLARS. THATS CHEVYS PRICE.

ROBERT.

yourneighbor -> RE: problem with fuel pump relay (9/20/2007 6:39:49 PM)

I replaced the pump assy. with one from Murrays for $220.00.  Make sure he checks his ground wire.  It comes off the top of the tank with the power harness but is a single black wire grounded on the frame.  No need to use the OEM part on this one.  Tell him to wait until he checks the ground and he may only need to replace the pump which is about $50 from Murrays.  The assy. includes sending unit and internal pipings.  If he does just need to tchange the pump have him change the screen for another $15.  Let me know how it goes. Mark

  

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