Page 1 of 2 12 LastLast
Results 1 to 10 of 15

Thread: 94 chevy silverado

  1. #1
    Full Member
    Join Date
    Jun 2008
    Posts
    14

    94 chevy silverado

    hey guys new here
    i have a 94 silverado with a 350
    around 1100-1500 rpms the engine seems as if its starved for fuel
    if i let off the gas or give it gas it goes away
    ive changed the fuel filter the fuel injectors on the TBI and replaced the diaphram new cap and rotor plugs and wires
    im lost to the problem
    the map and tps sensors both tested good
    it does it in park or under a load
    any help would be appreciated

  2. #2
    Senior Member junior3382's Avatar
    Join Date
    Mar 2007
    Location
    Currently, I live in Lancaster county, Pennsylvania.
    Posts
    3,171
    you tested the sensors and replaced filters.... is the computer communicating? I mean any codes to speak of?

    Now when you say it is starved for fuel, you sure it is not starved for air? Perhaps the MAP sensor could be testing fine, but there is still a blockage not allowing the proper air flow for your engine to breath properly.

  3. #3
    Full Member
    Join Date
    Jun 2008
    Posts
    14
    the check engine light is off
    i unhooked the vacuum from the map sensor and it sets the check engine light off right away

  4. #4
    Full Member
    Join Date
    Jun 2008
    Posts
    14
    i also took the EGR valve off and it was very clean
    was going to time time it but i cant find the bypass for manual mode

  5. #5
    Senior Member
    Join Date
    Dec 2007
    Posts
    1,645
    Does this happen with engine both hot and cold?

  6. #6
    Senior Member
    leolkfrm's Avatar
    Join Date
    Mar 2008
    Location
    N.Y.
    Posts
    8,892
    hook it to a good scan tool and make sure the tps is giving a good signal. Parts at the bottom range of specs give problems but don't set codes.

  7. #7
    Senior Member
    Join Date
    Nov 2005
    Posts
    92
    Leave the tps connected with key on. Using an analog(needle) or bargraph digital measure tps signal wire to ground should be .5v at tickover and go smoothy up all the way to wot at 4.5v as you open the throttle any 'dead' spots signal a bad tps. With a plain digital you cannot tell anything.

  8. #8
    Full Member
    Join Date
    Jun 2008
    Posts
    14
    Quote Originally Posted by Case 7230 View Post
    Does this happen with engine both hot and cold?
    happens both hot and cold
    just sputters if i hold the throttle there
    if i let it go it almost dies but dont
    idle is fine
    if i give it more gas it goes away as well

  9. #9
    Senior Member
    Join Date
    Dec 2007
    Posts
    1,645
    The reason I asked was I had the same idea as wojeepster. I thought you maybe had the TPS checked cold but the problem only occured hot. It does sound like a faulty TPS but if it checks out OK it can`t be. Pull the vacuum pipe off of the EGR valve, plug it and see if that makes any difference.

  10. #10
    Full Member
    Join Date
    Jun 2008
    Posts
    14
    Quote Originally Posted by Case 7230 View Post
    The reason I asked was I had the same idea as wojeepster. I thought you maybe had the TPS checked cold but the problem only occured hot. It does sound like a faulty TPS but if it checks out OK it can`t be. Pull the vacuum pipe off of the EGR valve, plug it and see if that makes any difference.
    i pulled the vacuum from the EGR and it lopes
    plugged it off and the problem is still there
    it sets off the check engine light too

Page 1 of 2 12 LastLast

Similar Threads

  1. 98 chevy silverado 305 vortec
    By robs98silverado in forum Chevy Truck Forum
    Replies: 3
    Last Post: 04-26-2008, 05:47 AM
  2. 1996 Chevy Silverado
    By dawright_1988 in forum Truck Classifieds
    Replies: 4
    Last Post: 03-29-2008, 07:49 PM
  3. Chevy Silverado 3/4 Ton
    By AdmnPower in forum Chevy Truck Forum
    Replies: 6
    Last Post: 12-03-2006, 09:36 PM
  4. 99 chevy silverado. headlights
    By jtslaugh in forum Chevy Truck Forum
    Replies: 8
    Last Post: 07-25-2006, 07:59 AM
  5. 1990 Chevy Silverado
    By Bakatari in forum Chevy Truck Forum
    Replies: 21
    Last Post: 02-06-2006, 09:00 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •