engine surging at idle

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Mar 31, 2010 | 06:58 PM

kanerboy

Thread Starter

Cruising

Joined: Mar 2010

Posts: 12

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engine surging at idle

hello i have tried everythjng i can think of cap rotor wires plugs iac valve and pump screen and it still wont go away any suggestions?thanks

Mar 31, 2010 | 07:38 PM

65Z01

Team Owner

Joined: Dec 2000

Posts: 90,675

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From: SE NY

Cruise-In II Veteran

Check all vacuum lines for leaks.

Mar 31, 2010 | 08:04 PM

kanerboy

Thread Starter

Cruising

Joined: Mar 2010

Posts: 12

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thank you i will try in am

Mar 31, 2010 | 08:11 PM

WW7

Le Mans Master

Joined: Aug 2007

Posts: 8,735

Likes: 412

From: WV

The way we usuallly check for vacuam leaks is either use a propane torch or carb cleaner and spray it around all the tubes and upper gasket areas with the car running. If the rpms pick up while your spraying the carb cleaner or waving the propane over these areas then you have found your leak..If you have an exhaust leak it could also affect the idle..Let use know what you find...WW

Mar 31, 2010 | 10:18 PM

kenv

Le Mans Master

Joined: Feb 1999

Posts: 6,470

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From: levittown pa. usa Even a bad day with my `Vette, is better than a good day at work

St. Jude Donor '10

Quote:

Originally Posted by 65Z01

Check all vacuum lines for leaks.

Also could be the MAF (at least thats what it was on mine)

Mar 31, 2010 | 10:24 PM

megtom2

Racer

Joined: Aug 2009

Posts: 496

Likes: 4

From: Cordova TN

Our 86 surged from 600-1k rpms at idle. Changed the fuel filter and oxygen sensor at the same time and it stopped surging. Not sure which one did it but one of them did.