Fuel pump relay/fuel pump

Asked by Feb 05, 2009 at 12:27 PM about the 1995 Chevrolet Astro

Question type: Maintenance & Repair

I have already checked/replaced the electrical connetions on the relay, fuseable link and fuel pump connections.  When I turn the key to the "on" position the relay activates and the fuel pump turns on for about 5 seconds then turns off.  I turned the key to the "off" position and back to the "on" position with no result.  If I jolt the ignition switch and turn it back on, the relay and fuel pump will activate with the same 5 second result.  Is this a problem with the ignition switch or is it a failing fuel pump drawing too much power and deactivating the relay? Please help.... Thanks.

2 Answers

1,545

The fuel pump is only supposed to run for a few seconds at a time when you first turn the key. This is to "prime" the fuel system and prepare for starting. The fuel pump should not run again until the engine starts, or fuel pressure drops below a predetermined level. This "priming" should happen EVERY time you shut off the ignition and turn it back on. If jiggling the key has an effect on fuel pump operation, I suspect you have a faulty ignition switch. You can test this by swapping the fuel pump relay with another similar relay in the fuse box. On most cars, the horn relay will work for this purpose. If this does not change the symptoms, then the relay is probably not the cause. If the fuel pump was drawing excessive amperage, then you would probably see this as a blown fuse, rather than a relay that does not stay engaged.

4 of 4 people found this helpful.
220

How do you reset the fuel pump in a 1999 Chevrolet astro van? and where it is located? please help

22 of 22 people found this helpful.

Your Answer

Chevrolet Astro Experts

  • #1
    celica_gt_pimp
    Reputation
    340
  • #1
    Tom Demyan
    Reputation
    340
  • #3
    John Saffrahn
    Reputation
    290
View All

Related Models For Sale

Used Chevrolet Astro Cargo Van
121 listings starting at $1,888
Used GMC Safari
90 listings starting at $1,995
Used Chevrolet Express
69 Great Deals out of 5,019 listings starting at $3,500
Used Chevrolet Tahoe
900 Great Deals out of 39,382 listings starting at $1,775
Used GMC Savana
5 Great Deals out of 1,110 listings starting at $3,650
Used Chevrolet Suburban
501 Great Deals out of 22,947 listings starting at $1,250
Used Ford F-150
3,222 Great Deals out of 226,647 listings starting at $1,250
Used Chevrolet Camaro
499 Great Deals out of 31,079 listings starting at $3,495
Used Chevrolet Blazer
871 listings starting at $950
Used Chevrolet Impala
548 Great Deals out of 33,119 listings starting at $1,499
Used GMC Savana Cargo
27 Great Deals out of 2,702 listings starting at $2,350

Used Cars For Sale

2005 Chevrolet Astro For Sale
22 listings starting at $1,995
2004 Chevrolet Astro For Sale
14 listings starting at $3,995
2003 Chevrolet Astro For Sale
33 listings starting at $2,900
2002 Chevrolet Astro For Sale
23 listings starting at $2,595
2001 Chevrolet Astro For Sale
26 listings starting at $1,595

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.