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trucks with no cats, I need some help

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Old Apr 22, 2005 | 01:05 PM
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Default trucks with no cats, I need some help

Well I think, may have done it now

Was at the exhaust shop. May have gotten too greedy, have no cats now. So wanted to do some ve tuning notice some cells +7 range. but cutouts are nice easy to get to.

But as soon as I get over 2300rpm, REDUCE ENGINE POWER, and get a code :

"airflow to tps signal corraltion high"

What is this only happens when I go mafless ???

help???
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Old Apr 22, 2005 | 01:09 PM
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Originally Posted by 8100hammer
Well I think, may have done it now

Was at the exhaust shop. May have gotten too greedy, have no cats now. So wanted to do some ve tuning notice some cells +7 range. but cutouts are nice easy to get to.

But as soon as I get over 2300rpm, REDUCE ENGINE POWER, and get a code :

"airflow to tps signal corraltion high"

What is this only happens when I go mafless ???

help???
You need to disable the appropriate codes when going MAFless. There are a list of codes in the Pcm section under one of the stickies.
You definately need to add some fuel in those cells. All of mine are at zero or negative.
I think the NA guys say to try to get them to +3 to -3 or something along those lines.
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Old Apr 22, 2005 | 05:02 PM
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No dice, disabled 101 thru 103 and set maf fail to 0

still gettin DTC p1514 "airflow to tps signal correlation high"

Last time, had to reflash the pcm so it would run.
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