Why won't it idle smooth or rev?

[silvia kid 02]

So I partialy finished my set t3/t4 set up and I've been driving it the last couple days taking it easy on it for the most part. Aside from the slipping clutch the only problem I've found it durring the day when the air is a lil hotter it hit an almost sort of rev limiter around 4 grand, I assumed it was just the maf sensor maxing out and I'm getting a A Z32 in a few days. At night when it gets cold it boosts and runs beautiful. So today I was just cruzing down the highway to my friends house and I could resist boosting it. It as I kind of expected it hit a stuttering wall at 4,000rpm so I left off and just continued cruzing. A few miles later I was in 5th gear about 2500rpm and it started to bog and die. It stayed running but choppy and I idled it in 5th around 2 grand or less the last few miles to his house. It persistently got worse and sitting in his driveway it bounces all over between 500 and 1500rpm struggleing to stay running. If I atempt to rev it it stutters and bogs. I tried replacing the plugs cuz I have been running it rich until I get a clutch and to the dyno so I don't burn anything up. I sounds like it's either fuel or ignition but it's been running fine the last few days and I havn't touched anything. Some one please help me if you could I'm kinda stranded at my friends house right now

[PapaSmurf2k3]

sounds like a bad maf or coolant temp sensor or something. as a quick fix see if resetting the computer will get you home. (unplug battery for about 10 mins)

[WDRacing]

You can reset the ecu by turning the diagnostic knob on the back of the ECU to diagnostci mode with the car ignition turned to ACC mode, then turn the car off, turn knob back to normal position and restart car.

If your MAF is bad, at idle it won't rev over 2300-2500 RPM. I've been through a couple of bad MAFs.

I'd say it's your IAT sensor. We had the same problem on a buddys KAE yesterday, bad IAT sensor. Also check your connections areounf the TB, make sure everything is seated properly.

WD

[silvia kid 02]

Whats the IAT sensor?

[DRIFTEADOR]

intake air temp

[turbo98_240sx]

umm My IAT is just sitting by the intake tube and my car seems to run fine, its a 98. maybe I'll go look at it again and see whats up.