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86 iroc tpi 5.0 surging at low speeds,HELP

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Old Feb 27, 2007 | 09:43 PM
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bmfIROC-Z's Avatar
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86 iroc tpi 5.0 surging at low speeds,PLEASE HELP

I just rebuilt my 305 tpi in my 86 iroc,runs good, but when im in town cruisin about 30-35mph and let off the accelerator to coast it atarts surging back and forth from about2500rpm to about 1000rpm ,but as soon as i rest my foot back on the accelerator it quits,otherwise it runs good, idles good,any help would be GREATLY appreciated,
thanx joe

Last edited by bmfIROC-Z; Feb 28, 2007 at 02:00 AM.
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Old Feb 28, 2007 | 10:53 PM
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From: Pittsburgh, PA
Car: Cobalt SS/SC and 88 IROCZ
Engine: 383 TPI
Transmission: 700R4
Axle/Gears: 3.73 Eaton Posi
Originally Posted by bmfIROC-Z
I just rebuilt my 305 tpi in my 86 iroc,runs good, but when im in town cruisin about 30-35mph and let off the accelerator to coast it atarts surging back and forth from about2500rpm to about 1000rpm ,but as soon as i rest my foot back on the accelerator it quits,otherwise it runs good, idles good,any help would be GREATLY appreciated,
thanx joe
did you have a new chip burned for the rebuild?
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