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1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-07-2003, 04:46 PM   #1
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Default question bout resistor

i got this thing off ebay that said if you put it in the wire that is connected to teh air box that it will trick the comp to thinin the air is colder than it is...when i got it its a resistor and yoru just suppose to plug it into the openings....does this work and will it F^%$ anything up/


willwren i hear you might know about htis...
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Old 07-08-2003, 12:35 AM   #2
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You got a link to the auctuoin?

If I remember right (and am thinking of the same thing...) What it does is trick the PCM in to thinking that the air comming in thru the intake is something like 67^. This is good on warm days (say 89^)....but when the temp drops below this (say 62^) it does absolutely nothing for performance at all.
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Old 07-08-2003, 12:40 AM   #3
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I hate it when someone buys those things.

Here'* the deal. The IAT sensor does affect performance. When you trick it into thinking the air is cooler (denser) than it normally is, the PCM will demand more fuel. You'll feel the performance increase right away.

HOWEVER!!!!!

Over time (less than 100 miles) you will slowly LOSE that performance gain, and it'll be gradual enough that you don't even know it. Why?

Beg.

Ok, I'll tell you.

Your MAF sensor and O2 sensor aren't stupid. They'll see you running too rich with a specific amount of airflow, and they'll lean out the mixture. Your PCM will learn the proper A/F curves. Sorry. The only way to fool it is to actually decrease the incoming air temps, or increase the volume. Hence the CAI.

You could have performed this short-term mod with a 25-cent resistor from radio shack. But it wouldn't have done you any long-term good, either.
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Old 07-08-2003, 05:48 AM   #4
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so put it in right before you race?
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Old 07-08-2003, 03:13 PM   #5
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That would be the only time I'd run it, and I wouldn't do it for long. O2 sensors are expensive. Running in a rich condition for extended periods may kill that sucker.
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