1999 chevy silverado 5.3 vortec Idles too high
1999 chevy silverado 5.3 vortec Idles too high
my sons truck,when he starts it up idles up so high its scary! it continues to idle way up then down till he takes off and when he does take off it leaves a huge rut in the yard from it. also when its running and he stops at a light or stop sign it continues to wanna kinda jump forward, he has to be really careful. we replaced the mass air flow sensor on it but it did no good. please help!
Re: 1999 chevy silverado 5.3 vortec
Check for any vacuum leaks that area causing the idle to be so high. The intake gaskets are commonly known to go bad and let the intake 'suck air' causing vacuum leaks and driveability problems.
Otherwise, check the throttle body for any carbon build-up that might be holding it open a bit. And check the linkage/cable for proper routing and attachment. Another thing to try would be to check the computer for any stored codes by getting it scanned.
Otherwise, check the throttle body for any carbon build-up that might be holding it open a bit. And check the linkage/cable for proper routing and attachment. Another thing to try would be to check the computer for any stored codes by getting it scanned.
GM Dealer Technician For 18+ Years
In the automotive industry for 20+
In the automotive industry for 20+
Re: 1999 chevy silverado 5.3 vortec Idles too high
Check for any vacuum leaks that area causing the idle to be so high. The intake gaskets are commonly known to go bad and let the intake 'suck air' causing vacuum leaks and driveability problems.
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