C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old Jun 9, 2015 | 07:58 AM
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alstar automotive's Avatar
alstar automotive
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hey guys im new here I just bought an 89 Camaro but someone put a set of 113 casting vette heads on it I don't know much of anything else about motor but im thinking I need a vette maf or chip the car does everything right except idle any help would be great thanks
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Old Jun 9, 2015 | 10:25 AM
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John A. Marker
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The heads will not make a difference. The computer will easily compensate for the better heads. You would only need to look at changing the tune (chip) if you changed the cam that was different than stock.

I would be looking at the IAC under the throttle body. This should screw into a casting under the TB and have a four wire plug that plugs into it. This "system" is basically a plunger that moves in and out to cover and uncover a hole that allows air to flow into the TB at idle. This controls the idle thru the computer.......

http://www.rockauto.com/catalog/more...nid=515&jpid=2
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Old Jun 9, 2015 | 10:51 PM
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Idle problems are almost always caused by a vacuum leak.
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