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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: 1984k30 on March 03, 2010, 11:38:04 pm

Title: vacuum advance question
Post by: 1984k30 on March 03, 2010, 11:38:04 pm

When I bought my truck the previous owner removed the vac advance and put a eliminator plate on the distributor.  I have never had a problem with it in the seven years I have had the truck although I always wonder why he got rid of it. Would I have any benefits in putting one back on or should I leave it how it is.

Title: Re: vacuum advance question
Post by: Captkaos on March 04, 2010, 01:07:39 am

It will help you part throttle response and possibly your gas mileage.

Title: Re: vacuum advance question
Post by: 1984k30 on March 04, 2010, 03:28:39 pm

Seems like it would be better with it on.  what would have been the reason for taking it off?  Does not advancing the timing give any benefit to the engine?

Title: Re: vacuum advance question
Post by: Captkaos on March 04, 2010, 04:29:37 pm

Having the vacuum advance helps.  There is no good reason to have it removed on a daily driver.

Title: Re: vacuum advance question
Post by: ccz145a on March 04, 2010, 04:50:26 pm

PO may have had a vacuum leak and decided to ditch it rather than fix it. ???

Title: Re: vacuum advance question
Post by: 1984k30 on March 04, 2010, 05:20:53 pm

Hey thanks for the info.  I think I am just going to but a whole new distributor with it on it and put it in.  Something I always wanted to do since I got the truck just never got around to it.