BADASS of New England

An automobile club for the enthusiast who enjoys the last of the big GM cars. The rear wheel drive B and D bodys. Chevrolet Impala SS, Caprice, 9C1, Buick Roadmaster, Oldsmobile Custom Cruiser, Cadillac Fleetwood
 
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 87 Caprice Sluggishness and Hesitation

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bladerunner



Posts : 212
Join date : 2012-07-16
Location : Maine

PostSubject: 87 Caprice Sluggishness and Hesitation   Sun Jul 14, 2013 12:17 pm

Got a friend locally who owns an 87 Caprice with a 305. He is complaining of some pronounced sluggishness and hesitation when driving the car soon after starting it. He claims that after 30 minutes of driving or getting up to highway speeds, the sluggishness goes away, even when accelerating from a dead stop. He took the car to a local carb/fuel injection shop who claimed the issue was due to venting in the fuel system, and even if he performs the eventual install of a crate engine, he will still experience the same sluggishness. I am not a super mechanic anyways, but this seemed dubious to me.
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MASShole9C1



Posts : 4211
Join date : 2009-12-16

PostSubject: Re: 87 Caprice Sluggishness and Hesitation   Sun Jul 14, 2013 5:17 pm

Well, here's the usual "could be many things".

Check EGR operation, make sure fuel pressure is good, check for vacuum leaks, clogged cats, and makecsurecthst the choke works properly AND the secondaries linkage is able to move freely without obstruction.
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1984twodoor



Posts : 4059
Join date : 2010-03-30
Age : 23
Location : Wilmington/Wakefield/Andover

PostSubject: Re: 87 Caprice Sluggishness and Hesitation   Sun Jul 14, 2013 5:41 pm

MASShole9C1 wrote:
Well, here's the usual "could be many things".

Check EGR operation, make sure fuel pressure is good, check for vacuum leaks, clogged cats, and makecsurecthst the choke works properly AND the secondaries linkage is able to move freely without obstruction.

All of this or change to a different carb and big cap HEI distributor and all of his issues will go away. It'll still be a 305 but it'll have way more umph than before, also don't expect the world from a stock 80s mileage magic gear ratio. Don't forget the basics...could just use a tuneup. I would pull some plugs to check them.


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Ironfistdog



Posts : 2124
Join date : 2011-01-11
Age : 35
Location : Warren, MA

PostSubject: Re: 87 Caprice Sluggishness and Hesitation   Sun Jul 14, 2013 7:14 pm

Clogged cat. Just had the same issue.
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bladerunner



Posts : 212
Join date : 2012-07-16
Location : Maine

PostSubject: Re: 87 Caprice Sluggishness and Hesitation   Sun Jul 14, 2013 7:33 pm

Thanks guys. All of this was based on what he said and what the carb specialist said, which sounded odd. I will let him know. They owner is looking at the 350 HO crate as his new engine. I might also recommend to him getting the car re-geared.
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MASShole9C1



Posts : 4211
Join date : 2009-12-16

PostSubject: Re: 87 Caprice Sluggishness and Hesitation   Sun Jul 14, 2013 9:29 pm

Agreed on gears
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1984twodoor



Posts : 4059
Join date : 2010-03-30
Age : 23
Location : Wilmington/Wakefield/Andover

PostSubject: Re: 87 Caprice Sluggishness and Hesitation   Sun Jul 14, 2013 11:15 pm

Ironfistdog wrote:
Clogged cat. Just had the same issue.

My carb must have had issues (other than being what it was in the first place) because my cat was empty.

MASShole9C1 wrote:
Agreed on gears

You're doing it wrong with 2.56 peg leg Surprised 
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MASShole9C1



Posts : 4211
Join date : 2009-12-16

PostSubject: Re: 87 Caprice Sluggishness and Hesitation   Sun Jul 14, 2013 11:21 pm

If you want to go "performance" get a tru trac with 3.73s and a higher stall converter.
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PostSubject: Re: 87 Caprice Sluggishness and Hesitation   Today at 3:59 am

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