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Performance Mod - Does the Resistor in the IAT Socket Work?


 
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Shane4188
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Joined: 02 Apr 2006

PostPosted: Fri Dec 08, 2006 10:51 pm    Post subject: Performance Mod - Does the Resistor in the IAT Socket Work? Reply with quote

Hey guys,

I have noticed lately that when the temperature gets nice and cold outside, my straight 6 4.0 ZJ runs excellent with a ton of additional takeoff, and an extremely quieter engine ones I get it out on the freeway and warm it up. I believe that the IAT sensor picks up on it being cold and advances the timing. I have noticed that there are many Performance mods on ebay that simply replace the IAT sensor with a resistor (4100 OHM for my Model). This allows the timing to always be advanced and tricks the computer into thinking that it is getting air in the intake that is -51 degrees. Does this kind of mod work? I have read the sellers feedback, but is seems mixed for these mods. Anybody got any horror stories. Also please not that my IAT is not malfunctioning because I just swapped it out with a new one. Thanks for any input,

Shane
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Shane4188
Member


Joined: 02 Apr 2006

PostPosted: Fri Dec 08, 2006 11:06 pm    Post subject: Reply with quote

Also I wanted to add the my Jeep is a 1993 Grand Cherokee Laredo I6 4.0L

Here is a link to the mod resistor for sale on ebay:


http://cgi.ebay.com/ebaymotors/18HP-PERFORMANCE-MOD-JEEP-GRAND-CHEROKEE-93-96-97-03_W0QQcmdZViewItemQQcategoryZ33598QQihZ010QQitemZ200056202546QQrdZ1QQsspagenameZWDVW

I am about to go buy this resistor and try the mod, tell me what you guys think.
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swamp boy
Cherokee Muderator
Cherokee Muderator


Joined: 01 Jan 2004
Location: New Orleans LA.

PostPosted: Sun Dec 10, 2006 8:49 pm    Post subject: Reply with quote

IT will work to trick your computer into thinking your engine is cold.. Which dumps more fuel into your engine... YOu will get slightly better engine responce . In my opinion its not worth the loss of fuel economy. (hahahah... I said fuel economy when talking about a jeep.. rofl )

You will not get any significant HP increase .. It will be just like you said.. Same as starting up on a cold day..

You can get a Jet Chip for about 2bills (maybe less if you check ebay..) It will actually give you better fuel curves and increase your horsepower not just dump fuel..

I had one for about a year and it worked nicely..

I got rid of it when I ported and polished my heads and put on a bored throtle body and Mopar performance ECM..
_________________
BONE STOCK
Unless you include the sawzall work..

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Shane4188
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Joined: 02 Apr 2006

PostPosted: Mon Dec 11, 2006 6:33 pm    Post subject: Reply with quote

ok guys,

Just what I wanted to hear. hearing that I would be getting worse mileage, I am probably going to opt against it. I might try it some day for fun, but no extended use of the resistor. Also are the jet chips worth the money in gas savings?
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