camd01silv

So I just bought a 2007 silverado with the 4.8 motor and 4L60e in it... I recently put the scantool on it and clicked the live data button and found out that the tps and calculated load read in the vicinity of 20-25% at idle. This is with air conditioning off and in park. Anyone have any ideas as to why its reading like this? I did search for this topic but came up with nothing. Truck seems to run fine... Except for occasional light surging. By surging I mean you can sometimes feel the truck act like the go pedal gets pushed a little without any driver input. Thanks in advance.

subeone

Do a tps reset. Should read 10% tps or so.

camd01silv

How do I do the reset?

subeone

Iirc, disconnect tps, key forward but truck not on for 10 seconds, turn off, connect tps, and turn on!

camd01silv

Tried doing the reset, but TPS and calculated load still shows between 20% and 25% at idle, sometimes a little higher. Also I noticed that IAT is reading 260 or so degrees at all times, whether the engine is running or not. I plugged in the scantool before I started the truck today, coolant temp showed about 90 degrees, IAT was 260. Seemed a bit odd. I unplugged the mass air sensor and the IAT went to -40 degrees, and the calculated load went to around 1.5 and stayed there no matter where the throttle was.

subeone

Is it a nnbs? Tps sounds right if nnbs, and seems ur maf is bad since iat is reading wrong

camd01silv

Yea it's the new 07 not the classic. Kinda thot the MAF mite be bad.