Upped the jet sizes, runs WAY better, but almost dies when I stop.
05-18-2011 | 06:44 PM
#1
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Joined: Apr 2009
Posts: 258
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From: Spokane, Wa.
Car: 88 Camaro
Engine: 383
Transmission: TH350
Axle/Gears: 4.11
Upped the jet sizes, runs WAY better, but almost dies when I stop.
So, I popped in 68\72 jets in 670 my street avenger today (up from 65\68). The off idle bog is GONE. Runs beautifully. However, sitting in the car at idle seems to stink like a bit of exhaust. Also, if I stop sharply or just rev it and then hold the clutch in, it almost dies now when the rpms drop.
Are these common problems of running rich? If so, why would the car run perfectly once it got too rich?
Are these common problems of running rich? If so, why would the car run perfectly once it got too rich?
05-18-2011 | 08:19 PM
#2
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Joined: Jun 2008
Posts: 660
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From: Corning NY
Car: 86' IROC
Engine: 388
Transmission: Built 700r4
Axle/Gears: 3.08 non-posi
Re: Upped the jet sizes, runs WAY better, but almost dies when I stop.
So, I popped in 68\72 jets in 670 my street avenger today (up from 65\68). The off idle bog is GONE. Runs beautifully. However, sitting in the car at idle seems to stink like a bit of exhaust. Also, if I stop sharply or just rev it and then hold the clutch in, it almost dies now when the rpms drop.
Are these common problems of running rich? If so, why would the car run perfectly once it got too rich?
Are these common problems of running rich? If so, why would the car run perfectly once it got too rich?
Did you try increasing the idle or leaning out the idle mixture? I would try the mixture screws first.
05-19-2011 | 07:31 AM
#3
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Joined: Dec 2004
Posts: 2,042
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From: Lincolnton, NC
Car: 88 IROC
Engine: 97 5.7 Vortec LT4 hotcam
Transmission: 700 r4
Axle/Gears: 3.73
Re: Upped the jet sizes, runs WAY better, but almost dies when I stop.
like mentioned, off idle bog is not solved by increasing the jets.
May be accelerator pump adjustment, may be transition slots, may be idle mixture screws.
If you are talking about off idle to WOT, then it could also be from the PV
What do you mean like a stink of exhaust? You could have a leak somewhere. OR do you mean that the exhaust smells like raw fuel?
May be accelerator pump adjustment, may be transition slots, may be idle mixture screws.
If you are talking about off idle to WOT, then it could also be from the PV
What do you mean like a stink of exhaust? You could have a leak somewhere. OR do you mean that the exhaust smells like raw fuel?
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