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High Idle after making run?

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Old 10-18-2009, 04:56 PM
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dukeme
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Default High Idle after making run?
The motor is a Bennet 393 Stroker with a S-Trim @ 13 Lbs.. Normally it idles at 900 RPM consistently. After making a couple of high power runs, the idle ranges between 1500 and then settles back to a jumpee 650 to 950. I have cleaned the IAC, MAF etc. Before I made the full throttle runs it was idling perfect at 900. Any thoughts?
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Old 10-18-2009, 05:16 PM
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mattdel
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i'd start with looking for a vacuum leak.
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Old 10-18-2009, 05:18 PM
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dukeme
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Originally Posted by mattdel
i'd start with looking for a vacuum leak.
Where do I begin?
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Old 10-18-2009, 05:24 PM
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mattdel
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well at 13 lbs of boost. theres a good probability of blowing out a weak vacuum line or destroying a weak gasket. nowhere in particular to start, just get out a can of carb cleaner and trace all intake gaskets and vacuum lines.
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Old 10-18-2009, 05:32 PM
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OK, that make makes good sense....I'll try that. Thanks
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Old 10-18-2009, 05:39 PM
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mjr46
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look at any and all lines, so what did it run??
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Old 10-18-2009, 06:38 PM
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Originally Posted by mjr46
look at any and all lines, so what did it run??
All fixed. it was a vacuum line that got blown off.....10.30 sec @ 134.9 mph...Prob the last one of the season?
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Old 10-18-2009, 07:13 PM
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PRO50SC
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Originally Posted by dukeme
All fixed. it was a vacuum line that got blown off.....10.30 sec @ 134.9 mph...Prob the last one of the season?
Oh snap! Nice run

1st run of last year I blew my intake snorkel off 1/2 way down the track. Talk about a vacuum leak
Last edited by PRO50SC; 10-18-2009 at 07:23 PM.
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Old 10-18-2009, 07:16 PM
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nice!!
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Old 10-19-2009, 10:32 AM
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dukeme
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Originally Posted by PRO50SC
Oh snap! Nice run

1st run of last year I blew my intake snorkel off 1/2 way down the track. Talk about a vacuum leak
Take a look at what blew off....
Attached Thumbnails High Idle after making run?-vaccum-plug.jpg  
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