Digging around I have found a lot of mixed info. I'm trying to narrow down the reason I have something going on that absolutely kills power in my truck. Those of you that know, know it's a L83 in a 89 suburban.
So after having a local shop go ahead and adjust my driveshaft and put some new coil springs in my truck, he drove it back over to me and said it felt like a dog. So out of curiosity, I hop in the truck and try to drive. It won't even barely get out of it's own way. I immediately think that the trans is slipping or something its so slow and sluggish.
Well I go ahead and flash a good known stock file that I pulled from the ECM and I just touched up a few things before flashing.
Now, truck felt great until it got hot enough again and the IAT's get high again. It was pretty warm today here in NC like 85-90 and my IAT's are up to 130+ almost cresting 140. It is at this time that I realize the IAT's are probably pulling timing a bunch or something. Well stupid me, I don't have my scanner set up perfectly but I went ahead and scanned it some. This is later in the evening and the temps outside have come down a bit.
Here's the log file I got, and if anyone has a good tutorial for setting up VCM scanner so I can go get a better read with more info it would be greatly appreciated. Aside from just making a Cold air intake setup for my truck, where it's actually seperated from the engine bay, is there any thing I Can do to help prevent it from being so sluggish when the IAT's get up to such a high temp?
I am thinking of zero'ing out the IAT retard table up to 140* then lowering the reatard after 140 some as I don't have an aggressive tune at all, in fact it's stock for the most part. Also there is a Mult vs IAT under burst knock retard that may have an effect but I am not sure I should be messing with it.
Let me know what you think. Thanks!
iat high.hpl