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Reload this Page check engine light, not coming on.
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LTX and LSX Putting LT1's, LS1's, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects, including repairs, swap info, and performance upgrades.

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Old 11-01-2009, 09:22 PM   #1
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Join Date: Apr 2005
Location: MO
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Car: 91 Z28
Engine: 305TPI
Transmission: 5 speed

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check engine light, not coming on.
The car sat for about a month or more. Had to jump it. It took a few seconds after started to idle up. Then if i gave it a little gas, when coming down it would go down to about 500 rpm. Then go up. Did that for a few minutes. I started playing with it and i unplugged maf, seemed like it didnt change how it ran and didnt turn on check engine light. Then i unplugged maf, tps, iat and it still didnt come on.. Shouldnt the light have came on? Ita a 99 ls1..
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Old 11-01-2009, 09:54 PM   #2
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Join Date: Mar 2004
Location: Richlands N.C.
Posts: 543
Car: '85 Z-28,
Engine: 350 carb'd
Transmission: T-5
Axle/Gears: 4.10

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Re: check engine light, not coming on.
It would come on after the engine ran long enough for the pcm to pick up that something was not in specs.
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Old 11-01-2009, 09:54 PM
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Go Back   Third Generation F-Body Message Boards > Tech Boards > Engine Swap > LTX and LSX
Reload this Page check engine light, not coming on.
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