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

check engine light - EGR

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Old Jul 23, 2022 | 03:33 PM
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Default check engine light - EGR

during the process of replacing valve cover gaskets, the tight clearance used by GM in 1992 and my bad mood intersected resulting in damage to the EGR/Air injection lines. It is highly doubtful I will repair the damage (other than stopping the leak) since headers are somewhere a few dollars down the road.

Can I use resistors or something to fool the system and keep the check engine light off?

thank you
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Old Jul 23, 2022 | 05:51 PM
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I'm pretty sure you can remove the front of the EGR system with no codes. However, your O2 sensor is a must.
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Old Jul 24, 2022 | 09:19 AM
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Technically the EGR system is still there. The air induction system is what received the brunt of my unhappiness. But there is a vacuum fitting on the driver side that went to both systems. I plugged up the one going to the air injection. But now I have a check engine light and an error that refers to the EGR

Last edited by dburgjohn; Jul 24, 2022 at 11:35 PM.
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Old Aug 1, 2022 | 10:53 PM
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clear codes and it comes back (32 EGR). Checked at plug when Check Engine light came on and found 12v on one and no ground on the other. I think this grounds through the computer. If I am wrong, can someone correct me on how the EGR solenoid grounds?
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Old Aug 2, 2022 | 10:12 PM
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ANSWER!

when the air injection system had its accident, I removed the valve below the throttle control motor (proper name?). Because everything else checked out individually, I put it back. Code 32 did not return when engine warmed up.

maybe someone smarter can explain why
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