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91 camaro surges at idle

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Old May 17, 2012 | 10:07 AM
  #1  
fntoy91's Avatar
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Joined: May 2012
Posts: 1
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Car: 1991 RS
Engine: 350 TBI
Transmission: 5 speed manual
91 camaro surges at idle

my tbi 350 surges 300 rpm at idle checked fuel pressure, 14 psi.,vac leakes, iac control egr valve, new plugs, new wires. Does anyone have an idea what might cause this?
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Old May 17, 2012 | 08:51 PM
  #2  
Wild Weasel's Avatar
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Joined: Jun 2008
Posts: 97
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From: Morris, IL
Car: 1989 RS Drop-Top
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 2.73
Re: 91 camaro surges at idle

Had the same problem with my 305 tbi. Finally found the gasket under the tbi was cracked. Cured mine, might check yours.....
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Old May 17, 2012 | 10:23 PM
  #3  
Black88Z's Avatar
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Joined: Nov 2011
Posts: 507
Likes: 1
From: Charlotte, NC
Car: 1988 IROC-Z Camaro, 1981 Trans Am
Engine: 350 TPI, 301 N/A
Transmission: 700r4, 350thm
Re: 91 camaro surges at idle

Did you look for leaks? if so, how? or did you check the actual vacuum pressure? What was the results?

Does it do it worst when cold or hot? Ohmed injectors?

What was the results of fuel pressure test? How did you do it?

To me this seems a lot like a vacuum problem somewhere, just a matter of finding it.
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