problem after cold start w/ QJET
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Junior Member
Joined: Sep 2003
Posts: 66
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From: Edmonton, AB
Car: '86 Z28
Engine: 305 LG4
Transmission: 700-R4
problem after cold start w/ QJET
ok what happens is that after the start the car will be warming up.. and any amount of throttle above 10% will result in the car choking out..
this will happen during driving as well, but after the car is warm (5-10 min of driving) i can do whatever and it is fine
what do i adjust?
this will happen during driving as well, but after the car is warm (5-10 min of driving) i can do whatever and it is fine
what do i adjust?
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Non-CC, right?
Sounds like your 2-stage accelerator pump is only operating in one stage.
Sounds like your 2-stage accelerator pump is only operating in one stage.
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
I am not familiar with the system from personal experience, just from reading. There is a solenoid that gets power from a thermal switch, which I believe is on the thermostat housing. Make sure the solenoid is getting power when cold, and if so, that the solenoid is operating.
Two books I know cover it: HP Books "Rochester Carburetors", and Haynes shop manual "Rochester Carburetors".
Two books I know cover it: HP Books "Rochester Carburetors", and Haynes shop manual "Rochester Carburetors".
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