Fuel pump troubleshooting help

Asked by Jun 03, 2017 at 02:02 PM about the 1998 Chevrolet C/K 1500 Silverado Extended Cab SB 4WD

Question type: Maintenance & Repair

I am having issue with my truck not starting. The fuel pump is less than a year
old but only runs 48 lbs of fuel pressure when cranking over. If I prime the
engine with pump it will start right up and then has 54 lbs of fuel pressure. I
dropped the tank and did a voltage drop test, the positive side had right at .52
volts but the ground side showed over 1 volt of drop. I read the .5 volts is ok. I
cleaned the ground wire to the frame and rechecked the voltage drop and it
remained the same. Now I am at a loss as to where to start looking to find
what is causing the voltage drop.

2 Answers

510

Check fuel pump relay and also when you installed pump. Did you tie in New fuel hose on pump or did you use the old coupler. Bad about leaking fuel on coupler

Thanks, I did not install a new fuel hose but wouldn't you smell or see fuel leaking?? I will do some testing on the relay and check for any fuel leaking by the coupler.

Your Answer

Chevrolet C/K 1500 Experts

  • #1
    Andrew Olsen
    Reputation
    3,550
  • #2
    John Saffrahn
    Reputation
    2,550
  • #3
    Rowefast
    Reputation
    2,150
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,154 Great Deals out of 183,297 listings starting at $1,693
Used GMC Sierra 1500
753 Great Deals out of 68,024 listings starting at $1,699
Used Ford F-150
2,231 Great Deals out of 181,369 listings starting at $1,500
Used Chevrolet C/K 2500
191 listings starting at $6,499
Used Dodge Ram 1500
411 Great Deals out of 10,701 listings starting at $1,500
Used Chevrolet Tahoe
623 Great Deals out of 36,241 listings starting at $1,800
Used Toyota Tacoma
547 Great Deals out of 42,057 listings starting at $2,999
Used Chevrolet Camaro
418 Great Deals out of 31,785 listings starting at $2,395
Used Chevrolet S-10
7 Great Deals out of 1,266 listings starting at $999
Used Chevrolet C/K 3500
235 listings starting at $4,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.