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TPI Hesitation

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Old Mar 11, 2010 | 08:13 PM
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zz???
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TPI Hesitation
Hey guys new to the forum. Have a 91 Formula with 5.7 TPI with new everything. Crate motor, hot cam, headers, fast burn heads, edelbrock tpi base, 1.6 roller rockers, mallory and msd ignition, stock throttle body and plenum with new sensors, etc. Main issue is off idle hesitation and idle that goes up and down. Any suggestions?

Thanks
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Old Mar 11, 2010 | 08:43 PM
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nightowls_gm
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Joined: Jul 2006
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From: BAY AREA
Car: 88 IROC Z
Engine: 5.7
Transmission: 700R4
Axle/Gears: 3.27 9 BOLT POSI
Re: TPI Hesitation
TO START DID YOU CHECK ALL YOU VACUM LINES?
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Old Mar 11, 2010 | 08:45 PM
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Re: TPI Hesitation
10-4 also by the way the car has a new chip by PCM4less
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Old Mar 14, 2010 | 02:37 PM
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Rolling Thunder
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Joined: Mar 2008
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From: CT
Car: 86 T/A, 83 Z/28
Engine: 5.0 TPI, 350 2 X 4 bbl
Transmission: 4 speed auto, 5 speed manual
Axle/Gears: 3.23 posi, 3.73 std
Re: TPI Hesitation
Ide check the EGR valve if you still have it.
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Old Apr 9, 2010 | 12:19 AM
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Mauiblubandit
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Joined: Jan 2009
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From: Woodridge IL
Car: 1990 Formula 350
Engine: 350 tpi heads cam full exhaust
Transmission: 700r4 corvette servo and 2800 stall
Axle/Gears: 342 out of a 00 SS
Re: TPI Hesitation
I have the same setup and same problem
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