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I come to a stop the idle jumps to 2000 RPM

Tiny
HARDTIME10
  • MEMBER
  • 1993 CHEVROLET VAN
  • 190,127 MILES
I have a 1993 chevy g30 5.7 it starts and drive but when I come to a stop the idle jumps to 2000 rpm an when I press the gas to go the van shuts off will start back up if I floor it and it start and does the samething when I stop again
Friday, September 14th, 2012 AT 12:52 AM

6 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Check for vacuum leaks. Check the throttle body for carbon build up.

Check fuel pressure. Start there

Roy
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Friday, September 14th, 2012 AT 2:27 AM
Tiny
HARDTIME10
  • MEMBER
  • 4 POSTS
Changed fuel pump and fuel lines and vacuum lines, cap, rotor, wires plugs, coil, sprayed carb cleaner around vacuum line no change and inside tbi
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Friday, September 14th, 2012 AT 12:07 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
It may have a bad idle air control valve in the throttle body.

Roy
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Friday, September 14th, 2012 AT 12:39 PM
Tiny
HARDTIME10
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  • 4 POSTS
Question for you can that go bad the idle air control valve and the engine light don't come on
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Friday, September 14th, 2012 AT 7:40 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
On the old obd1 systems, yes

Roy
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Friday, September 14th, 2012 AT 8:12 PM
Tiny
HARDTIME10
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  • 4 POSTS
Cool going to go get one and change it
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Friday, September 14th, 2012 AT 8:37 PM

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