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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: Jerr-conn on October 07, 2018, 11:10:14 am

Title: Stiff TBI throttle pedal
Post by: Jerr-conn on October 07, 2018, 11:10:14 am

My 87/350/700r4/TBI engine had a stiff pedal. So I replaced the cable assy with new. Greased before installing. Still stiff. Very touchy when applying initial pressure. Why is it so touchy to
Accelerate only? No extra added spring or anything else.     Thanks.

Title: Re: Stiff TBI throttle pedal
Post by: bd on October 07, 2018, 11:17:30 am

Check for radial play in the TBI throttle shaft.  The throttle plates may be catching in their bores.

Title: Re: Stiff TBI throttle pedal
Post by: Jerr-conn on October 08, 2018, 07:43:17 am

Drove it yesterday for first time since fusible link issue. Seems better. Not sure why.
But I will check throttle play this week. Thanks Rich.

Title: Re: Stiff TBI throttle pedal
Post by: MIKE S on October 08, 2018, 10:27:24 am

Your TV cable going to transmission could also be worn causing binding. Disconnect cable to transmission and try it. Don't drive it with cable disconnected. Can burn up transmission in a little as a mile.