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daves71, Fleet Manager
Category: Heavy Equipment
Satisfied Customers: 719
Experience:  35+years working on heavy equipment and heavy duty trucks
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question#1 vehicle is a 1992 gmc topkick low pro, when you

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question#1 vehicle is a 1992 gmc topkick low pro, when you let of the gas the throttle not the cable seems to stay open just a little after releasing pedal is it an injection problem seems to be at a high rpm while idling? #2 have an inch or so play in steering box do i need a whole new box or is there rebiuld kits to get it solid?
Submitted: 7 years ago.
Category: Heavy Equipment
Expert:  daves71 replied 7 years ago.
Hi srumley,thanks for using JA.You need to list these questions separately.What engine package do you have on this truck?
Customer: replied 7 years ago.

A 366 on sticker on header no name
Expert:  daves71 replied 7 years ago.
Ok,so you have a 366 gasoline engine ,is this correct?
Customer: replied 7 years ago.

Yes I think the name is XXXXX XXXXX something. Gas never fully releases throttle not cable
Expert:  daves71 replied 7 years ago.

Thank You,if I am correct this motor has throttle body injection. The first step I would take is to clean the throttle plate and housing bore with gum cutter spray to get rid of the gum/varnish that may cause the throttle to stick on return to idle.Try this and let me know,thanks,Dave






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