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#1
06-18-2007, 02:33 PM
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1999 454 high idle
I recently acquired a 1999 K-3500 with a 454 and manual transmission. I am experiencing DTC code P0507. Whenever I shift, the throttle hangs at about 1700 rpm with the clutch pushed down. Eventualy after a period of about three seconds it will begin to slow back down to around 1200 rpm. After a long time it may even settle down to 800rpm. It obviously shouldn't be hanging so long at these rpms. What do I need to do about this?
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#2
06-18-2007, 03:09 PM
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Re: 1999 454 high idle
Usually due to a vacuum leak. Could be intake gasket, TB gasket or vacuum hose.
//2000CAYukon
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#4
06-19-2007, 10:19 PM
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Re: 1999 454 high idle
Use a spray can of carb or brake cleaner with the engine running. If there is a vacuum leak the rpms will change. Could also be the IAC valve, throttle linkage (binding), bad throttle body (binding).
__________________
57 Chevy 210 65 Olds 442 Convertible (Another one sold) 75 GMC Vandura 3/4 Ton 1999 K2500 Old Body Style Suburban (Gone but not forgotten) 05 Dodge Ram 3500/5.9 Cummins 2012 Toyota FJ Cruiser
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