I have a vacuum leak and an IAC problem

1993 GMC VAN
313,000 MILES
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TMACMONA
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1993 GMC Ventura Van, Scan test reveals vac leak and IAC problem, Van is surging at stop, sometimes will not start unless d open butterflies), Replaced the following: Heat sensor, map sensor, IAC motor, AGR, PCV Valve, Main gasket on throttle body, checke
Nov 6, 2011 at 10:11 PM
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BILLYMAC
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This is telling you that the iac is failing. there is a oring on the iac sensor it is prob broken.yes this will cause surge or erattic idle
Nov 6, 2011 at 11:02 PM