Engine Misses when lights are on

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Apr 12, 2007 | 09:50 AM

racebgn

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Joined: Apr 2007

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From: Wildersville tn

Engine Misses when lights are on

My 80 model starts missing any time the lights are on. Once they're turned off, the car runs fine. The light switch was replaced prior to my buying the car. What else could cause the miss? Possible vacuum leaks due to the headlights being activated? Maybe the new switch is bad? Thanks

Apr 12, 2007 | 10:53 AM

Crash80

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From: Castle Hills Texas

Sounds like a definite vacuum leak. have you looked at the vaccum hoses under the dash?

Apr 12, 2007 | 02:22 PM

wombvette

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Joined: Jan 2000

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From: New Hill NC

Quote:

Originally Posted by Crash80

Sounds like a definite vacuum leak. have you looked at the vaccum hoses under the dash?

Apr 12, 2007 | 02:31 PM

bbeck

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From: Ashley Michigan

could also be a weak alternator- happened with my brother on his nova. I'd prob check the voltage output real quick and then look for a leak.

Apr 12, 2007 | 07:01 PM

L Holmes

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Joined: Feb 2007

Posts: 331

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Deffinately sounds like a vac. leak. Plug the main vac. line from the intake manifold and turn on the lights. If the car still misses its probably your alternator. If the car does not then you have to go in search of the leak which is in the headlight vac. circut. Good luck! You will need it.
Here is a helpful troubleshooting page.

http://www.corvette-101.com/vacuum.htm

Last edited by L Holmes; Apr 12, 2007 at 07:05 PM.