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High engine revving and cut out after throttle body cleaning
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Anexamander
Novice
May 17, 2017, 1:19 PM
Post #1 of 9
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High engine revving and cut out after throttle body cleaning
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Hello, today I cleaned the throttle body and plate on my 1997 gmc sierra with 5.7 L vortex engine. Everything went great until I tried starting it... instantly revs up to about 35000 rpm and then the engine dies... this is probably quite simple and I apologize for wasting your time, but I'm in a pinch and couldn't find any information online.
Thanks,
G
(This post was edited by Anexamander on May 17, 2017, 1:21 PM)
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
May 17, 2017, 2:12 PM
Post #2 of 9
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Re: High engine revving and cut out after throttle body cleaning
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? What did you do use a whole c
an with engine off maybe? These run lousy just anyway with air filter/snorkel parts just removed and do stall. That has to all be in place and in good shape or all bets off.
IDK - Some you can get air filter in all crocked and may notice bottom under there catches quite the odd debris - own one, this year to boot shocked at what junk - leaves and such are safe BEFORE filter and no clue why it isn't near leaves where it is but if all that junk went thru unfiltered would be trouble,
T
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Hammer Time
Ultimate Carjunky
/ Moderator
May 17, 2017, 2:12 PM
Post #3 of 9
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Re: High engine revving and cut out after throttle body cleaning
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That would be 3500 RPM.
I don't know if you took anything apart that could have damaged the IAC but try the reset procedure first. If this doesn't work, try disconnecting the battery for 5 minutes. When you restart it it will relearn the idle strategy.
- Turn the ignition switch to the ON position for 5 seconds.
- Turn the ignition switch to the OFF position for 10 seconds.
- Start the engine.
- Check for the proper idle operation.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Anexamander
Novice
May 17, 2017, 2:14 PM
Post #4 of 9
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Re: High engine revving and cut out after throttle body cleaning
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Thanks I will try that now... what is the iac? I was pretty careful and I don't think I damaged anything. Will try the reset quick here
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Hammer Time
Ultimate Carjunky
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May 17, 2017, 2:18 PM
Post #5 of 9
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Re: High engine revving and cut out after throttle body cleaning
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Idle Air Control
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Anexamander
Novice
May 17, 2017, 2:41 PM
Post #6 of 9
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Re: High engine revving and cut out after throttle body cleaning
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Well those solutions did not seem to do much... so next I'll change the iac I suppose...
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Hammer Time
Ultimate Carjunky
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May 17, 2017, 2:44 PM
Post #7 of 9
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Re: High engine revving and cut out after throttle body cleaning
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First make sure you didn't leave any hoses disconnected or damaged. Any unmetered air getting into the system can do that.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Anexamander
Novice
May 17, 2017, 2:44 PM
Post #8 of 9
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Re: High engine revving and cut out after throttle body cleaning
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Will do! Thank you very much!
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Anexamander
Novice
May 17, 2017, 4:58 PM
Post #9 of 9
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Re: High engine revving and cut out after throttle body cleaning
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So replaced both sensors with no luck... my mechanic buddy is gunna come take a look tonight so I'll let you know if we get it fixed and what the problem was
(This post was edited by Anexamander on May 17, 2017, 5:00 PM)
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