Cant idle down new holley
Thread Starter
Supreme Member
iTrader: (1)
Joined: Apr 2007
Posts: 1,196
Likes: 0
From: BUFFALO, NY
Car: '89 IROC-Z
Engine: 355
Transmission: 700r4 edge 3000 stall
Axle/Gears: 9-bolt 3.73
Cant idle down new holley
I bought a new holley 650 street hp double pumper. I preset and cleaned everything before I bolted it on, set the accelerator pump clearance, and set the secondary screw 1/2 turn past touching as per holley's instructions. I can't get it to idle low enough, I can turn the idle screw all the way out and it is still too high. Idle mixture is set, and I am running 12* initial timing, and have the vacuum advance set to full manifold and am also running a pvc breather. I pull about 17" of vacuum at idle around 1100. I have an LT4 hot cam.
Thread Starter
Supreme Member
iTrader: (1)
Joined: Apr 2007
Posts: 1,196
Likes: 0
From: BUFFALO, NY
Car: '89 IROC-Z
Engine: 355
Transmission: 700r4 edge 3000 stall
Axle/Gears: 9-bolt 3.73
Re: Cant idle down new holley
nevermind i figured it out, had to close the secondaries some more
Joined: Mar 2000
Posts: 43,187
Likes: 45
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
Glad you figured it out. Most people don't realize both primaries and secondaries are involved in idle speed.
Thread
Thread Starter
Forum
Replies
Last Post
Hotrodboba400
Firebirds for Sale
3
Dec 10, 2019 07:07 PM
86CamaroDan
Engine/Drivetrain/Suspension Parts for Sale
2
Sep 29, 2015 10:08 PM
Hotrodboba400
Firebirds for Sale
0
Sep 2, 2015 07:28 PM
