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IAT Sensor resistor for ponies


wonword
04-26-2005, 09:46 AM
Hey, I bought a small resistor that fits into the IAT(intake air temp) sensor. The resistor tells the ECU that it's sucking in air at 55 degrees, giving it similiar effect of a CAI(cold air intake). But in the Haynes Repair Manual they say that only the 95+ altima has this sensor :confused: I though all 92-97 Altimas were the same? Does anyone know where I could put this resistor on a 94 Altima? It has two sensors coming off the intake, I think the MAF sensor and some other one? Because there has to be a way that the ECU meaures temp. in mine too right? Any ideas would greatly help!!

JustSayGo
04-26-2005, 08:46 PM
Great instructions on the starter removal. You probably already know that the advantage of cold air intake is that cooler air is more dense than warmer air resulting in a piston squeezing more air that will suport more fuel. That will increase power. Tricking the computer with the resistor will cause the computer to signal a little more fuel that would be correct with 55 degree air, and advance the ignition timing. If detonation occurs you will loose the timing advantage as the knock sensor retards the timing. 93-97 Altimas are the same with minor differences like computer sensors. I suspect earlier Altimas may rely on a pre-set intake temp in a similar way that the resistor adjusts the input message to the computer. The resistor can't provide the same advantage as cooler air. Did you solve your transmission bearing noise problem while you were replacing the clutch? My 97 Altima transmission made the noise you describe. A throwout bearing will make more noise when the clutch pedal is depressed because of the increase in presure on the bearing and because it is turning at the same speed as the engine. When the wheels are moving, bearings on the differential carrier and countershaft are turning. When the clutch pedal is up, transmission mainshaft bearings are turning and the throwout bearing stops and has no presure on it. I replaced my worn transmission bearings and differential carrier bearings. I learned a few important things about Borg-Warner transmissions. I am happy to share what I know if you still need to get rid of the noise.

wonword
04-27-2005, 02:17 PM
Um the car is all put together, but it still needs gear oil, and i have to bleed the clutch slave . . . and little things like that. It was supposed to be starting today, but my work called in and said they need me, so hopefully after school tommorrow it will be running. I would still like to hear what you have learned, just in case. Here is the weird thing though, obviously when me and my friend took off the tranny, we drained the gear oil. The tranny was slowly leaking from the bellhousing before, and i couldnt figure out where it was leaking from and why it would be in the bellhousing so i just put the tranny back on w/o fixing the leak. the weird thing is that when i put the tranny on again, it started leaking again even without me adding fluid! So im thinking there must be a small crack in the case somewhere, because I didn't fill it up at all again so that eliminates it leaking from around the input shaft and driveaxles. If you have any idea of where, please let me know.
Thanks,
John

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