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Open Loop Idle, great cold, bad warm.

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Old Oct 13, 2005 | 10:17 AM
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scorp508's Avatar
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Joined: Mar 2002
Posts: 277
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From: Boston, MA
Car: Corvettes
Engine: Modified L98 & LT5
Transmission: DN 4+3 & ZF6
Axle/Gears: 3.07 & 4.10
Open Loop Idle, great cold, bad warm.

Does anybody have any hints on what to look (mechanical or ECM, doesn't matter) for what could cause this...?


Open Loop Idle, cold engine: Perfect

Open Loop Idle, warm engine after driving for a little while: Bigtime surging, almost stalls if you give it no throttle.

Closed Loop Idle, all the time : Perfect


As soon the engine flips from open to closed everything is just fine.

'165 ECM
$32B Code
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