KR Trouble with 3.6" SC Pulley

I don't know the "DHP-correct" procedure for using my BIN with your PCM, but if you got it to work this time, I don't see why you can't modify my file and upload it again and again.

The BIN you receive from DHP will be essentially the same minus the changes I made, and with a generic fuel tune a little richer than stock. I wouldn't use the new BIN unless DHP says you should.

There is the option of copying and pasting data from my BIN to your new one, but it will take some time as you must copy each table one at a time. You do this by exporting data as a file, then importing it into your new BIN. For example, the MAF table I wrote can be exported, then pulled into your new BIN and saved. It only takes a minute, but you have to do it for every table you want changed, and you have to double check that you cover them all. This is why it takes time, because there are dozens of tables to check.

Unless you have VIN# conflicts with my BIN, I'd just continue to use it. The nice thing about having the PowrTuner is you can keep various BINs (for summer, winter, track, street, etc.) and upload them as often as you like. Partial rewrites don't take long and do not require the case-learn procedure.

You may try starting from a stock BIN, which is included in the 1.5 BIN. You can always return to stock values as a default. Some at the DHP forum start from the 1.5, others feel starting from stock is best. I started from the 1.5 and had pretty good luck.

Thanks for the info. I didn't know if DHP included a BIN file with a PT purchase. I'd prefer to keep working with your modded BIN.

If it ain't broke...

Sorry, bad choice of words being that you're having KR issues right now. You'll fix it, though. Just a matter of time.

The KR is no worse than before, no worries in that respect.

I logged an easy run up to 60mph hwy speed, will post it up tonight. I also logged a WOT run, but apparently messed up somehow, because it doesn't show in my Saved Logs. Crap.

Brain freeze here. Thought I'd started a New log before the WOT run, turns out I in fact just left it logging. SO, I do have the WOT run on this log, way down towards the bottom of the file. One REALLY odd thing stands out on the WOT portion of the log...

www.scandepot.net/viewscan.php?pk=4415

Ok, I deleted the first 800+ rows of the scan, here's the WOT section:

www.scandepot.net/viewscan.php?pk=4416

Ok, good scan Dave. KR is there, but not out of control. O2 numbers are way low. What do you say we throw some more fuel in at WOT, see what happens? I can have a new tune for Mon, let me know...

FYI, your current WOT fuel curve commands about 4% more fuel max. My tune is set about 20% over stock. I could take you up around 8-10% (only at WOT) to see if those O2 numbers will go back up to around 930.

Seems I cut a little too much fuel at idle and cruise. We can fix that, too.

Sounds good Aaron. Did you happen to notice that single oddball boost number? 19 ???? Weird... If you can make some adjustments to fueling, I'll see if I can arrange to get it loaded again this week. You did bring my max KR down a few degrees, I think I had spikes in the 8-9 range before.

I won't be at work all work, so please use gramlow@cableone.net for email.

Yes, that happens sometimes. Data can spike or go zero, just ignore it. I've seen it happen with other parameters, too.

I'll get you a new tune for next week. It's better to go slow and get it right over numerous attempts than to do it all at once and risk messing something up.

I've sent the new BIN to your email. I didn't do the timing adjustment, only upped fueling some more. The new tune has a max fueling increase of 8.5% over stock, with an average of 4-6% over most of the WOT band. If this doesn't fix it, we'll try pulling some timing.

I'm calling your new tune "80F #3" because your IAT shows values close to this range. Let me know when you get it loaded and log a new scan. Remember to do a partial rewrite, and reset fuel trims...

I anticipate your LTFT will lower to around zero during idle and cruising. It started out -11ish, now they're up around +5 average. Would be nice to see them between -4 and 3 with most driving. At WOT, hopefully we'll see O2 rise into the mid 900s with the extra fuel. KR should go down some more.

Got it, thanks Aaron.

We got tune #3 loaded tonight, the software wanted to do a full write, so we let it. Just made sure it ran then, didn't have time to do any driving. I'll get some miles on it tomorrow , going to Seafoam the oil then do a 100m round trip out of town and change back to 5W30 RP for winter.

I did a WOT scan earlier today with the 104's, numbers are a bit better, but not significantly of course.

www.scandepot.net/viewscan.php?pk=4423

Hmm... Did you reset the fuel trims? O2 numbers are a little better, but still on the low side. I'd like to see them in the 930-940 range. LTFT I don't understand... should be lower than they are at idle and cruse. We could add some more fuel. Is your tuner guy okay with doing continued rewrites for you?

You know, if you can find someone who knows what they're doing; have them check fuel pressure at WOT, that would be my next step. INTENSE did mine once, they said it was 58 PSI, which is about right. Would be good to know in your case. We keep adding fuel, but is it getting into the cylinders?

Aaron, that scan is not with the new tune, just with the 104's swapped, scanned earlier in the day before Mike came over last night to load it. I was just wondering if the 104's would show much of any change in numbers.

I had to keep my 2yr old home today, his daycare is closed. SO, no car play for me today. I had intended to put some miles on it, then do a WOT run. Should be able to do so tomorrow. We'll see how things look before doing a fuel pressure check.

Oh, that explains things. I was wondering why nothing really changed much. The 104s shouldn't change the numbers, but could stop knocking a bit. They're supposed to, anyway.

Whenever you can get the new scan up, I'll put together a new tune for you to try. I want to see your KR go away!

AA wrote:

Oh, that explains things. I was wondering why nothing really changed much. The 104s shouldn't change the numbers, but could stop knocking a bit. They're supposed to, anyway.

Whenever you can get the new scan up, I'll put together a new tune for you to try. I want to see your KR go away!

Me Too! And I'm sure that it will. BTW, I ordered my PT and a refurbished Dell laptop last night, so eventually I can start to play with this myself.

Here's the latest scan, with the 104's and newest BIN. Certainly some improving numbers there, but KR shot up around 95-100 mph. O2's and LTFT's are coming around too.

www.scandepot.net/viewscan.php?pk=4433

Much better, Dave. Honestly, when I look at your LTFT and O2 numbers, I'm really surprised there is still KR. We have really got the numbers looking good. I'll get another tune together for you soon, pull timing back to stock, try to pin everything down.

This weekend I learned a few more tuning tricks, one is we can only get so close using the car's O2 sensor. You may have heard about using wide band sensors to check true A/F ratio. This is the only way to know for sure how rich or lean you are. Scanners will get you close, so we'll do the best we can with what we have.

I'd like to see what your car is commanding for A/F. Can't remember, is there an A/F parameter on your LS1M?

Nope, no A/F on the LS1M. You are correct, wide band is the way to go, but is not cheap either. For my needs, we'll get close enough with O2 numbers.

Just to try something different, I filled up yesterday from a different station, though it's only 91. 92 is hard to find in Fargo. I'll drive for a couple days then try to get another WOT scan done. I'm debating if I should run the Riv or the 68 this coming Saturday, final street legal date. Would love to see a sub-15 with the Riv, if weather cooperates. We had near 90deg yesterday, but only high of 50 today.

Can't hurt to go back to stock timing, I guess. Should bring KR down quite a bit more. It's not bad at all until I hit the 95mph mark. Wonder what would cause such a spike from 95-100. A Powerlog in the spring will make a difference too, I'm sure. No hurries with another tune, I'll probably not load one again until I can do it with my own PT.

I think there was an A/F reading on that one scan I posted, from the guy that loaded for me.

Dave,

I have a new tune ready for you when you need it.

It's not likely, but possible that my OD woes could be related to the TCC settings I created. If there is any worry, you can just set it back to stock, or somewhere in between. The settings I used pulled the TCC in and out of overdrive a lot, so depending on what's wrong, there could be a connection, just so you know.

Ok, thanks. I actually spend very little time/miles driving in OD. Feel free to send the file if ready. Maybe I can load it this coming week.

I may have the PT software all ready to go this weekend. D/L'd the 1.2.4 zip file, but waiting for some input on the forum before I install it. Might need to do 1.2.3E.

Ran at the track a few times earlier today. Sorry no logs. Haven't figured out a good launch yet either.

2.329 60'
93.54 mph
15.21 ET

The 93.54 mph trap says you're making more power. With a better launch you've got 15 flat.

55 deg ambient doesn't hurt either.

It's hard going back and forth between RWD and FWD. With my 68 it's just heat the ET Streets, and I can go WOT as soon as I see the last yellow.