Very high idle - Boost Forum

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Very high idle
Sunday, August 03, 2014 1:48 PM
So just finishing installing S/C 03 cavi auto
First start up ran real ruff 30 sec or so , shut it down realized I did not have the tmap installed
So installed tmap restarted now it wants to rev to the moon 5k
Checked all vac lines
Pulled TB check it resealed
I am stuck on what else it could be. I wire the t map and did it to the diagram but was funny the way the plug read 4321 not 1234

I am open to try any thing at this point
Also this is a gm reflash

Re: Very high idle
Sunday, August 03, 2014 2:33 PM
Sure the throttle cable is all the way in the throttle body wheel? You have to yank it to seat it in there properly.



"In Oldskool we trust"
Re: Very high idle
Sunday, August 03, 2014 2:50 PM
Right after I have dinner I am going to out and try it
Re: Very high idle
Sunday, August 03, 2014 3:16 PM
Ok so just went out when I unplug the tmap it will run but like @!#$, hook it back up wants to rev to the moon
Re: Very high idle
Sunday, August 03, 2014 3:18 PM
I can't believe it'll even start with the map sensor unplugged.



"In Oldskool we trust"
Re: Very high idle
Sunday, August 03, 2014 3:19 PM
Try plugging everything back in but unplugging the throttle positioning sensor. Then give her a shot. You looked in the tb to ensure the plate is all the way closed right?



"In Oldskool we trust"
Re: Very high idle
Sunday, August 03, 2014 3:28 PM
Started it with the tps disconnected still revved up. I took set screw out and pushed close tb by hand I even put a different TB on it.
Re: Very high idle
Sunday, August 03, 2014 3:29 PM
Gotta be a major vac leak somewhere.



"In Oldskool we trust"
Re: Very high idle
Sunday, August 03, 2014 3:31 PM
The only thing I find odd is that with tmap unplugged it runs. I will check for vac leaks be back in a few
Re: Very high idle
Sunday, August 03, 2014 4:39 PM
Going to pull the SC off tomorrow and make sure ever thing is sealed up good
Re: Very high idle
Sunday, August 03, 2014 4:41 PM
Keep us posted man.



"In Oldskool we trust"

Re: Very high idle
Sunday, August 03, 2014 5:22 PM
Happened to me last week... Could be iac stuck open?? I got a throttle body from the junkyard and left the iac in and that's what caused my problem... Similar just sayin.. Check it



Re: Very high idle
Sunday, August 03, 2014 5:23 PM
Good thought. They've been known to stick in the past.



"In Oldskool we trust"
Re: Very high idle
Tuesday, August 05, 2014 3:24 PM
did you reconnect the brake booster hose...i always forget because how mine is run, you can barely see it. also make sure the bypass is operating, this could be a few things.

bypass valve, IAC stuck open. TB not closing enough. all which deal with vacuum. pull and check all gaskets POST blower. mani gasket blower gasket bypass gasket.



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