Hello All!
I wanted to get some ideas about a sticking throttle from the community here. I have a 91 K1500 w/Vortec head, GMPP EGR intake which was bored to match the bored TBI from RV Morse (RIP). Also, comp cam (I forget which one, but middle of the road so to speak) and Dynamic EFI computer.
The throttle only sticks with the engine running, which to me implies that the shaft or bearing is worn, but I feel no up/down play and very little side to side. I've had this issue from the very beginning of the build, and also sent the TB back to Morse for inspection, which he said passed.
The TB slams shut when worked by hand when engine is not running. Likewise, the throttle cable (new) is very smooth with little felt drag when operated by hand.
What is also odd, is that there are long stretches where it works absolutely fine, only to slowly degrade to near un drivability and back again.
I'm happy to post pics or videos.
Suggestions Welcome!
thank you!
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