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06-02-2009, 07:30 PM
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#1 |
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Registered User
Join Date: Feb 2009
Location: ca
Posts: 26
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idle RPM's low
as of today for some reason when my truck is at idle the rpms are bouncing around between 300 to 500, and sounds like it wants to die. its allways idled around 700 and sounded strong. when i give it gas it lags a litle but then everything sounds fine. what could this be?
Last edited by snoman; 06-02-2009 at 07:31 PM. |
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06-02-2009, 10:23 PM
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#2 |
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Gearhead and audio junkie
Join Date: Aug 2008
Location: nunyah
Posts: 452
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Re: idle RPM's low
You check for gasket leaks around the base of the carb? If you spray the base of the carb where it bolts to the intake manifold with a bit of carb cleaner and the idle changes and goes up then you have a air leak and you got to change your gasket. You could have gotten some bad gas too. Also what kind of carb do you have?
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06-02-2009, 10:38 PM
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#3 |
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J'ville Junkman
 
Join Date: Mar 2006
Location: Pomeroy, Ohio
Posts: 572
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Re: idle RPM's low
I'd be checking for vacuum leaks as well. In addition to base gasket, check all the vacuum hoses coming off your carb and intake from where they start to where they end. I had a problem once where the vacuum line connects to the modulator on the trans.
Good luck.
__________________
72 3/4t Suburban 402BB (Daily driver for 8 years)  68 GTO (never ending proj) 91 Kawasaki ZX-7R 57 Chevy 210 Wagon - 9 Passenger (Wife's project-working on floorpans) 73 Corvette (17 yr old daughter's: Another project - what's wrong with me?)  53 Willys M38 |
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06-02-2009, 10:45 PM
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#4 |
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Registered User
Join Date: Feb 2008
Location: Grande Prairie Alberta
Posts: 261
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Re: idle RPM's low
also a good idea to check for leaks around the intake gasket
__________________
eh  1970 Chevy C20 daily driver  1975 GMC Jimmy 4x4 project  1966 GMC C10 Dad's project 
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