Thread: Tuning problems

My car is a 1997 GTP with 3.4, headers, intake, 104s, 180*, dhp tune with some adjustments. The problem. After my buddy writes a new file to my computer, right after start up and I start to drive, the car will not shift until I let off the gas completely. It did this for about 30 miles the other day then finally went to shifting normal. Every time we do a write it does this though. Anyone ever had this problem? Also if I just reset the computer by unplugging the battery for 30 minutes it does not do this. Along with when the tuner is saving the log data, it won't download all the data and we have to cancel it. We still get a log but sometimes a lot of info is missing. What the f? It works fine on his car. It's a DHP tuner. So anybody ever experienced this?

We have been trying to find the cause of knock and work on the tune, but it is being very difficult. We thought maybe the TPS, but when I reset it by unhooking battery the problem is not there.

Also forgot when we do a rewrite 10 codes show up. Like IAT code, MAF, TPS, all p01xx codes I think. I have them written down at the house. Then his tuner will not pick them up but can clear then. While my scangauge will be able to read them.

It's not a 98 PCM. It would not even read the file till he updated the software, but reads fine on his car. So we put a stock tune on then tweaked it a bit with zzp base file. We did full writes any time something was changed. We changed the TPS and did not make a difference. I think it is just relearning the shift. What we are worried most about is the knock now. After doing a run we noticed the TP% was not matching up with the MAF frequencies. At like 61% throttle it was at around 9400hz. When on his car 9400hz is 91% TP. And seeing how the files are to big to post I can't post them here. F***!!!!!

Yeah, I've realized I'm less worried about that than I am about what is up with the MAF freq to TP% in the knock area. It just won't let me post the scans. Also it has a new ac delco MAF.

Well seeing how my buddies car is knock free and he has been tuning for a while I would think he knows what he is doing. We have been doing the MAF tune then saw that. PM me your email and I will send the scans. I don't understand near as much as he does though, that is why i'm not tuning it.

2000 Daytona

My OSID is 16252965 which it says is supported, but I don't see any GP bin files nor can I even look at the ones on there until my registration is approved. He is going to look whenever he gets home, but he is sure it's a 97 bin.

Originally Posted by BillBoost37

You are approved. Go for it.

Okay so I found out it is a 97 bin file on my car, that is compatible. Different number than mine, but still a 97 and the only one that would work. I have the file and the scans, but they are too large to post. What can I do?

Here are the codes and the first scan is modified timing, second is stock.
P0101 P0102 P0103 P0107 P0108 P0112 P0113 P0117 P0118 P0121 P0123 P02A8( is this???) P0441 P0503 P0506 P0507

Bin file download
Download Brad tune 29OCT stock timing.bin for free on uploading.com

Originally Posted by Z34Phoenix

In reply to your pm and after looking over what has been suggested, I agree with what has been said already. It is likely that the OSID of the bin that is currently in the vehicle is not correct. Use the websites bill mentioned to locate the most current OSID and use it as the base for your tuning.

The bin file on my car now is #16243643. Which is a 97 L67 bin that is one of the listed ones that are compatible. I also think we were having trouble with any of the other 97 files wanting to write to the pcm. If it's a 97 file and my OSID is 16252965 should it matter? Did you happen to look at the scans?

MAF is brand new AC Delco as well.