Quadrajet fast idle issue.

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Conejo_K10

Junior Member
Joined
Oct 24, 2019
Posts
29
Reaction score
20
Location
So. Calif
First Name
Pete
Truck Year
1975
Truck Model
K10
Engine Size
350
Yep, that's why they were known as quadra-bogs. The secondary air valve is easy to adjust, you just need an allen wrench and a small screwdriver. I have q-jets in 2 of my cars and they run great.
The PV's sometimes get stuck. If you have it open, the PV can be polished using scotch-brite and cleaned. Also there are different springs for the PV, having the correct one is critical.
The fuel with alcohol is hard on the accelerator pump. AP's that have a compatible seal are available.
 

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