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1985 Quadrajet will not idle correctly

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Old 08-19-2018, 03:19 PM
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Car: 1985 camaro Z28
Engine: 305 5.0 V8 carburated
Transmission: 700r4
1985 Quadrajet will not idle correctly

I have my 1985 z28 with the quadrajet on an lg4 motor.

I had it running fine and everything but then had to pull the motor and trans for several unrelated issues.

Now that I have it all back in, it will not idle on it's own unless I drive the idle speed screw in past 1000 rpms (according to the gauge).

What could be the issue here? I've tried searching everywhere for answers to this.

I do not see any vacuum leaks anywhere. I did not touch timing during the engine removal and install.

Please help its one problem after another.
Old 08-19-2018, 04:27 PM
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Car: 1984 Chevrolet Camaro Z28
Engine: 5.0 Liter 4-BBL V8 High Output
Transmission: 5-Speed Manual
Axle/Gears: 3.73
Re: 1985 Quadrajet will not idle correctly

Did You Set All 3 Idle Adjustments.

Old 08-19-2018, 04:30 PM
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Car: 1985 camaro Z28
Engine: 305 5.0 V8 carburated
Transmission: 700r4
Re: 1985 Quadrajet will not idle correctly

I cant even do that unless I have it running on own and warm.
Old 08-20-2018, 08:37 PM
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Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: 1985 Quadrajet will not idle correctly

Any codes?
It's a vacuum leak, or you missed plugging something back in.
How did you manage to remove the engine without pulling the distributor?
Old 08-21-2018, 08:43 AM
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Car: 1985 camaro Z28
Engine: 305 5.0 V8 carburated
Transmission: 700r4
Re: 1985 Quadrajet will not idle correctly

Turns out it was egr related. Sort of. I had the egr mounted and it wouldn't run, so I took it off and put on a block off plate. Turns out the block off plate wasn't tightened down all the way so yes. It was a vacuum leak.

What could have happened to the egr?

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