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Could it be my fuel pump relay

Tiny
JAY-TROWEL TURNUP KING
  • MEMBER
  • 1993 CHEVROLET CHEYENNE
  • 5.0L
  • V8
  • 2WD
  • AUTOMATIC
  • 169,000 MILES
I put a new fuel pump on truck drove it not even 2 miles and it killed on me and now it wont start its like its not getting any gas and I hear the pump cut on when I turn the switch and now I have 2 turn it a couple of times before it comes on what could it be?
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Saturday, March 25th, 2017 AT 10:08 PM

2 Replies

Tiny
CATAFINA
  • MECHANIC
  • 98 POSTS
Could be your Relay or the fuel pump inline fuse
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Sunday, March 26th, 2017 AT 12:33 AM
Tiny
STEVE W.
  • MECHANIC
  • 13,465 POSTS
When you replaced the pump did you also replace the connector pigtail? They were bad for loose connections caused by a failing pump heating the contacts because of the higher current draw.
A related issue is that the higher draw would also cause the pump relay to heat up and damage the connector.

If the pump is turning on for the 2 second prime but the engine won't run it's possibly a plugged filter, bad pressure regulator or even a bad oil pressure switch.

Start by running a fuel pressure test. Then try shooting a bit of starter fluid into the intake and see if it fires on that as a quick test for spark.
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Sunday, March 26th, 2017 AT 5:34 AM

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