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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: chevytruknut on June 21, 2011, 12:04:44 pm

Title: Gas pedal stiff on TBI
Post by: chevytruknut on June 21, 2011, 12:04:44 pm
Hey guys, I have an 87 silverado with a 350 tbi eng. and 700R trans.  My gas pedal is hard to push. I've tried two different tbi units and the last one I rebuilt. I have a brand new throttle cable and the trans cable is adjusted correctly. Am I missing something? I've had other TBI trucks and the gas pedal was normal. I am doiing jackrabbit starts every time I take off. Anyone else have this problem?
Title: Re: Gas pedal stiff on TBI
Post by: VileZambonie on June 21, 2011, 10:09:23 pm
Nope. Is the cable binding?
Title: Re: Gas pedal stiff on TBI
Post by: chevytruknut on June 22, 2011, 10:17:21 am
Nope, new cable
Title: Re: Gas pedal stiff on TBI
Post by: 1979C20 on June 22, 2011, 10:45:32 am
It could still be binding. Did you lube the sleve around the cable that comes out of the firewall?
Title: Re: Gas pedal stiff on TBI
Post by: Grim 82 on June 22, 2011, 10:49:22 am
Disconnect the cables and turn it by hand. Hook up one cable at a time and see which one is giving resistance.
Title: Re: Gas pedal stiff on TBI
Post by: topp on June 22, 2011, 12:17:03 pm
Check the pedal in the truck....

Unhook cable and see if the pedal is binding...
Title: Re: Gas pedal stiff on TBI
Post by: Captkaos on June 22, 2011, 01:27:18 pm
Do you have a return spring hooked to it?
Title: Re: Gas pedal stiff on TBI
Post by: chevytruknut on June 25, 2011, 06:33:27 pm
Thanks for the help. Soon as I figure this out I'll post the fix.
Title: Re: Gas pedal stiff on TBI
Post by: 1979C20 on June 25, 2011, 06:42:37 pm
How stiff is your throttle return spring? That could be a culprit as well.
Title: Re: Gas pedal stiff on TBI
Post by: Captkaos on June 27, 2011, 03:26:00 pm
If you have a spring on a TBI THAT is the problem.  The return spring is built into the Throttle body.
Title: Re: Gas pedal stiff on TBI
Post by: 1979C20 on June 27, 2011, 04:31:17 pm
If you have a spring on a TBI THAT is the problem.  The return spring is built into the Throttle body.
i didnt know that capt. Pretty interesting. I figured that when you asked if it had one that it was supposed to.
Title: Re: Gas pedal stiff on TBI
Post by: VileZambonie on June 27, 2011, 10:00:19 pm
post a pic of what you have