I have a 95 gmc k2500 with a 5.7. I have spark at each plug and I can see fuel coming from the injecters spraying into the "carburator" but it still won't start. please help

Asked by Jan 18, 2017 at 08:45 PM about the 1995 GMC Sierra 2500 2 Dr K2500 SL 4WD Standard Cab LB

Question type: Maintenance & Repair

5 Answers

85

I've had the same issue in the past with my 94 k2500, those 5.7 TBI engines have some jacked up wiring, have you checked your ignition system, have you recently removed your distributor?

7,175

If you said u have spark at the plugs and fuel in the injector, try spraying quick start just to see if it will run for a bit, if it does, maybe ur fuel is contaminated. If it still doesn't run, check timing. If timing is ok, do a compression check

The truck had been running rough and then all of a sudden died. I pulled every plug wire and I have spark at each cylinder and can see fuel spraying into the " Carb" but still no fire. I too thought a timing issue but the rotor is lined up with the #1 plug wire when the #1 cylinder is at TDC. I don't know much about the ignition system. Is there a MAP sensor or something like one? And no I haven't move the distributor. Thanks

7,175

Yes, there's a MAP sensor, it's located right left of the carburetor when you remove the air filter cover. Here's a link to a video https://youtu.be/4WyILsH4_pk

73,085

Check the TBI base gasket. Mine was so deteriorated it was letting too much air threw. Also then check the fuel pressure. It should be 9 to 13 lbs. May be a week fuel pump, but the fuel regulator in the TBI need rebuilding as the spring get weak. There are repair kits for this. Other wise check the compression. May want to do that first.

Your Answer

Sierra 2500

Looking for a Used Sierra 2500 in your area?

CarGurus has 150 nationwide Sierra 2500 listings starting at $4,800.

ZIP:

GMC Sierra 2500 Experts

  • #1
    Rowefast
    Reputation
    160
  • #2
    tennisshoes
    Reputation
    90
  • #3
    JOHNG123
    Reputation
    60
View All

Related Models For Sale

Used GMC Sierra 1500
790 Great Deals out of 67,767 listings starting at $1,350
Used Dodge Ram 2500
138 Great Deals out of 5,061 listings starting at $2,999
Used Ford F-150
2,121 Great Deals out of 181,534 listings starting at $1,000
Used Ford F-250
472 listings starting at $3,490
Used GMC Sierra 3500
239 listings starting at $5,988
Used Chevrolet C/K 2500
206 listings starting at $6,499
Used Dodge Ram 1500
403 Great Deals out of 10,657 listings starting at $1,500

Used Cars For Sale

2004 GMC Sierra 2500 For Sale
31 listings starting at $4,800
2000 GMC Sierra 2500 For Sale
37 listings starting at $4,950
1999 GMC Sierra 2500 For Sale
7 listings starting at $10,200

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.