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stiff gas pedal

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by ktedesco, Apr 17, 2004.

  1. ktedesco

    ktedesco 1/2 ton status

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    Is there a was to lighten or smooth the gas pedal on a TBI engine. I know with a carb you can install a lighter throttle cable return spring. My gas pedal is real stiff and sticks when I first start from a stop. There is no way to "crawl start". Once I am moving the pedal seems to move freely enough as long as my foot is still applying pressure to the pedal. Thanks all.
     
  2. rooferbret

    rooferbret 1/2 ton status

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    Im curious about this one also. My gas pedal has been stiff since i bought the jimmy.
     
  3. Thunder

    Thunder 3/4 ton status

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    Check the linkage to make sure it isn't binding. If its ok.
    Replace your throttle cable. It prolly has a broken strand and is a bunched up in the casing causing the cable to bind pretty common problem with throttle cables.
     
  4. ktedesco

    ktedesco 1/2 ton status

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    I checked the linkage and it seems ok, I will look into replacing the cable also. Thanks Thunder.
     
  5. 4xcrazy

    4xcrazy 3/4 ton status

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    Quit putting Viagra in the gas tank,,, /forums/images/graemlins/dunno.gif

    /forums/images/graemlins/grin.gif

    /forums/images/graemlins/doah.gif

    /forums/images/graemlins/whistling.gif
     
  6. bigburban383

    bigburban383 1/2 ton status

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    Oh thats normal, mine has been still for as long as I know /forums/images/graemlins/waytogo.gif

    Everytime people drive it they cant get it to go, they just sit there and try and ease on the gas but are babies and can't do it then they slam on it and do a hole shot accidently. I do not even notice a problem, I think you have better control of the throttle too.
     
  7. dyeager535

    dyeager535 1 ton status Premium Member

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    Disconnect it at the pedal and TB, and see if it's hard to move. It should slide almost effortlessly. That will tell you if it's the cable or not.
     
  8. 87BrnRsd

    87BrnRsd 1/2 ton status

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    My gas pedal on my 87 tbi blazer is stiff too. I used to have hard take offs when I first bought it, and was looking for a way to make it move mnore freely, but after driving it for a while, I got used to it. Now, I dont really even notice it. I dont know if that will help you, but how long have you been driving the truck? Sometimes it is just a matter of using/driving the truck everyday that loosens it up if the previous owner didnt drive it very much.
    -Harrison
     
  9. BobK

    BobK 1/2 ton status

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    Me and BranndonC just tried to diagnose his problems with a stiff gas pedal.
    We 1st disconnected both the gas and trans cables then moved the throttle blades manually.They moved smoothly.

    We then lubed the throttle cable and reconnected it.The throttle moved normally with no binding.

    We then lubed the T.V. cable and reconnected that.that seems to be the problem.
    The T.V. cable moves smooth on it's own(not connected to anything) but once the ends are connected to the throttle and trans we ended up with the stiff pedal again.

    I don't know what can be done about it to be honest. /forums/images/graemlins/confused.gif
     
  10. jjlaughner

    jjlaughner 3/4 ton status

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    I pulled the linkages and it moved freely, reconnected and its still stiff, swapped out a new cable, still the same... STIFF /forums/images/graemlins/dunno.gif

    Maybe a new spring on the throttle body shaft? /forums/images/graemlins/thinking.gif
     
  11. rooferbret

    rooferbret 1/2 ton status

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    Sounds kind of weird but is there some kind of spring at the pivot at the gas pedal?? I cannot find a return spring on my tbi. Havent looked real hard though.
     
  12. ktedesco

    ktedesco 1/2 ton status

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    Only had the truck a month so maybe I just have to get used to it. My daily driver as well as my wifes car both have very light pedals so I really notice the Blazer being stiff. When I get in the other vehicles I almost put the pedal to the floor because I get used to pushing hard on the K5. /forums/images/graemlins/eek.gif
     
  13. Mastiff

    Mastiff 1/2 ton status Premium Member

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    Funny, I have this problem on my non-TBI 83. It's not a big deal, but compared to our newer vehicles, the K5 just takes a fair amount of effort to work that gas pedal.

    I think there IS a spring on the pedal itself. In my case, I just replaced the throttle cable, and it's totally loose. I kinda doubt it's the throttle return cable, and I'd be afraid to mess with that too much anyway (having it go out would be frightening /forums/images/graemlins/shocked.gif). I'm gonna look at the pedal itself later today.
     
  14. bigburban383

    bigburban383 1/2 ton status

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    Come on guys, light pedals are for Jeeps and Fords.
     
  15. heavy4x4

    heavy4x4 1/2 ton status

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    Haha, this post brings back good memories of when I was 14 and helping my dad pull out stumps with my (his) suburban. The truck was in 4wd, and he hooked up the chain and said, "okay, go...but slowly." I sat there and ever so gently tried to press the gas pedal. The truck didn't move nor the rpms really climb, so my dad said, "Stephen, you can go!" as if I didn't hear him the first time. Then, when I finally did go, I did exactly that, GO! The pedal would reach that stiff "breaking point" and I had that stump pulled out in a nanosecond. Needless to say, I was more careful the following times.

    The suburban I drive now is the same one although modified. Nothing has been done to the throttle cable/tbi unit since then, but I've got a lot of control over the throttle now. I guess it just takes getting used to.

    If it's overly stiff or sticky in certain parts, another thing to do is go wiggle the throttle linkage at the tbi unit. If it moves around a lot, you could have an ovaled bushing hole in the tbi unit and, as far as I know, the only fix for that is a replacement tb.
     
  16. fortcollinsram

    fortcollinsram 1/2 ton status

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    rapalce or lube that cable. I have a Lokar stainless steel cable sitting here that I need to put in...I bought it to also fix a poor-goemetry probelm I have at the TB where the cable attaches to the bracket...

    Chris
     
  17. K5er4Life

    K5er4Life 1/2 ton status

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    I know exactly what you are talking about, mine did the same thing and I fixed it perfectly. Its a combination of two things. One being the TV cable, they seem to start to bind pretty badly sometimes, replace it or lube it up real good /forums/images/graemlins/whistling.gif The other part is the butterfly plates sticking to the walls of the TBI. To correct this I had to have brass bushings put in the throttle shaft. This is because the the shaft wore out the TBI body a little causing the plates to stick. If its bad enough you can open up the throttle and see on the TBI where the plates are binding. Mine was getting worse and worse and I continued to put up with it until my girlfriend drove my truck home (me tooo drunk) and she almost ran over a toyota matrix. Fix it youll be happy you did.
     
  18. Ignato

    Ignato Registered Member

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    K5er4Life nailed it on the nose. I fought with mine for a good while, untill I threw a little wd40 where the butterfly plate swivels on the throttle body, loosended it right up! Sadly, it didn't last long. I've tried silicon spray...even chain lube, can't seem to keep it lubed up. What REALLY needs to be done is a rebuild, but I don't feel like screwing it up/tearing it apart just yet. Besides, I think I'm getting used to it hopping around and stuff. /forums/images/graemlins/crazy.gif
     

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