open or closed loop

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May 17, 2006 | 12:18 AM

wmcrn

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Staging Lane

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open or closed loop

at idle, once the o2 have heated up, isn't the engine suposed to run on a closed loop fuel delivery system?

May 17, 2006 | 12:24 AM

Black02SS

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From: Kokomo, IN

If the o2s are fully heated, the car will be in closed loop.

May 17, 2006 | 12:28 AM

wmcrn

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Staging Lane

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thats what i thought, any idea why it would switch back to an open loop and give no codes?

May 17, 2006 | 12:32 AM

Black02SS

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From: Kokomo, IN

Are you not seeing any codes or is it just not tripping any? I had my car do this but I was getting insufficient switching codes. Sometimes it would trip a SES light, other times it wouldn't.

May 17, 2006 | 12:44 AM

wmcrn

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Staging Lane

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the mechanic said there were no codes on the scanner, said it was because the o2 were not heated up enough. he thinks its because i took the cats off, i think he is full of ****. i think its a bad sensor, just not bad enough to trip a code. also at wot i am having my timing retarded to 9 degrees. what a mess!