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1986brownjl

08-25-2013 09:45 PM

motor wants to stay on

I have a 86 chevy k10 when I turn the truck off the motor acts like it wants to stay on, like it will turn over a few times after I turn the ignition off. is that the carb? it has a stock quadrajet on it and what size cfm is it to? thanks for the help.

SamsAutoParts73-87

08-25-2013 10:00 PM

Re: motor wants to stay on

I'm sure someone that has a lot more knowledge then I will jump in...but I would check the "anti-dieseling" solenoid on the carb if the truck has one, or the timing may be off slightly.

-Sam

cleansquare

08-25-2013 10:03 PM

Re: motor wants to stay on

Its called dieseling...what rpm does you truck idle at? Could be too high
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SamsAutoParts73-87

08-25-2013 10:08 PM

Re: motor wants to stay on

Quote:

Originally Posted by cleansquare (Post 6238599)

Its called dieseling...what rpm does you truck idle at? Could be too high
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Also worth in investigating, your emissions label on the radiator support will tell you what RPM it should idle at, it should give one for manual trans and one for auto.

-Sam

V10farmboysdream

08-25-2013 10:15 PM

Re: motor wants to stay on

I'd start with timing. To far advanced will cause a diesel. Crappy gas and high compression will do that too and comes with a spark knock
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geezer#99

08-25-2013 10:45 PM

Re: motor wants to stay on

Turn your idle down. If it idles too slow then just hook your vac advance to manifold vacuum to speed it back up.

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