SRT4 93tune Improvment request U7134

Krazyrdr83 · Post by **Krazyrdr83** » Mon Sep 28, 2009 9:35 am

Uploaded the 93oct tune that you e-mailed me again back into the PCM. did a pull, 3rd & 4th, and one of just 3rd. a/f were actually better this morning. a few hits of 12.2, no biggie, most of the pull a/f jumped from 11.6-11.9. Here is the log...I have 11% added from 3-4 & 4-5, 10.5% from 5-6, & 10% from 6-7. No timing pulled. Spiking 21 holding 16. Only got 1 count of knock max, once at around 5400 in 3rd, and once at around 5600 in 4th.

http://depositfiles.com/files/ej1to8j5p

SCGt94 · Post by **SCGt94** » Mon Sep 28, 2009 10:17 am

krazy are you using the new crom or a custom tune i sent you?...if it was a custom tune i bet that the changes never applied and it got all messed up..it keeps happening with the srt4 tools for some reason....

Krazyrdr83 · Post by **Krazyrdr83** » Mon Sep 28, 2009 11:09 am

it's the new crom you sent me, assuming it applies to the 93 oct tune...I have custom tunes saved on my tool, but I uploaded the new crom, and then installed the 93oct tune. first time I did this, things kept acting up like I posted last week..

re-installed the 93oct tune this morning since the new crom is still in the tool. and the settings seemed to settle down more today

duster360 · Post by **duster360** » Mon Sep 28, 2009 11:31 am

Krazyrdr83 wrote:Uploaded the 93oct tune that you e-mailed me again back into the PCM. did a pull, 3rd & 4th, and one of just 3rd. a/f were actually better this morning. a few hits of 12.2, no biggie, most of the pull a/f jumped from 11.6-11.9. Here is the log...I have 11% added from 3-4 & 4-5, 10.5% from 5-6, & 10% from 6-7. No timing pulled. Spiking 21 holding 16. Only got 1 count of knock max, once at around 5400 in 3rd, and once at around 5600 in 4th.

http://depositfiles.com/files/ej1to8j5p

Your LTFT is REMOVING 5% fuel during WOT.
Flashing a new tune DOES NOT clear this out. Disconnect the battery for a few minutes and retest to see if you A/F has improved.

Also, your timing looks too high for that ACT to be "just" a 93 tune. looks fishy to me.

btw you're only holding 16psi if you happen to live at 7000ft. If not you're realy only holding about 13-14psi.

duster360 · Post by **duster360** » Mon Sep 28, 2009 11:40 am

Srt4Dr1ver wrote: I datalogged today and after retarding knock 2* in 2k-3k and 3k-4k rpm's and 3* in 4k-5k and 5k-6k rpm's That brought it down to a 1.5 knock. Initially it had hit 6.0 just like it used to. What's going on? I will post up my dl. The dl is after I added 6% fuel in 3-4, 4-5 and 5-6 rpm's.

Just like LTFT, LT Knock Retard DOES NOT clear when you flash a new tune.
Your log shows 0 ST Knock which is perfect!

The Lt knock that is showing up is just a left over correction from your old tune.

Disconnect the battery to reset LT knock to 0 and you're good to go!

Krazyrdr83 · Post by **Krazyrdr83** » Mon Sep 28, 2009 11:41 am

duster360 wrote:
Krazyrdr83 wrote:Uploaded the 93oct tune that you e-mailed me again back into the PCM. did a pull, 3rd & 4th, and one of just 3rd. a/f were actually better this morning. a few hits of 12.2, no biggie, most of the pull a/f jumped from 11.6-11.9. Here is the log...I have 11% added from 3-4 & 4-5, 10.5% from 5-6, & 10% from 6-7. No timing pulled. Spiking 21 holding 16. Only got 1 count of knock max, once at around 5400 in 3rd, and once at around 5600 in 4th.

http://depositfiles.com/files/ej1to8j5p
Your LTFT is REMOVING 5% fuel during WOT.
Flashing a new tune DOES NOT clear this out. Disconnect the battery for a few minutes and retest to see if you A/F has improved.

Also, your timing looks too high for that ACT to be "just" a 93 tune. looks fishy to me.

btw you're only holding 16psi if you happen to live at 7000ft. If not you're realy only holding about 13-14psi.

I'll disconnect the battery and do another log. I'll double check, but I'm pretty sure that I uploaded the 93 tune in this morning. As for my boost, gauge says 15-16, unless it's that much off. And I'm in FL, so 7000ft is out the question.

SCGt94 · Post by **SCGt94** » Mon Sep 28, 2009 11:50 am

interesting, i was going to say wtf...i never touched the open loop fuel etc. Im glad its getting straightened out, well hopefully providing we see this next log. Good to hear, anyway ive got a bench ecu here, flashing, reading, observing load times. I don't see any difference really, read and write speeds were the same between my new crom and the old crom that is out right now. I even timed them haha, read speed was 52.78 seconds, write speed was a minute and 35 seconds. Between the croms there was a +/- 2 seconds. I tested the logging and it was fine for more then 15 seconds, but i could only log battery volts since it was a bench ecu, i would need a car in here to test that to its fullest.

duster360 · Post by **duster360** » Mon Sep 28, 2009 11:50 am

Krazyrdr83 wrote:
duster360 wrote: btw you're only holding 16psi if you happen to live at 7000ft. If not you're realy only holding about 13-14psi.
I'll disconnect the battery and do another log. I'll double check, but I'm pretty sure that I uploaded the 93 tune in this morning. As for my boost, gauge says 15-16, unless it's that's off. And I'm in FL, so 7000ft is out the question.

Never trust a pos gauge when you have a MAP sensor to use. Log Baro to be sure of your boost

Assuming a generous Baro pressure in FL of 14.6psi, you're only holding 13.0psi at 5800, which is pretty weak. My stock wga on PCM boost control holds 14.5-15psi at the same RPM.

Krazyrdr83 · Post by **Krazyrdr83** » Mon Sep 28, 2009 11:57 am

Alright, well, I'm at work now, I could go disconnect for a bit, and then do a log later. as for the WGA, it's one of the original forge wga, had it on for 2 years, plus I bought it used. so the spring may be pretty weak. I do have an AGP wga that I have to send back for repairs.

I do believe this is one of the few times that I didn't get any knock, car felt strong and smooth. I will post back up later tonight with updates. Thanks guys

duster360 · Post by **duster360** » Mon Sep 28, 2009 12:03 pm

SCGt94 wrote:interesting, i was going to say wtf...i never touched the open loop fuel etc. Im glad its getting straightened out, well hopefully providing we see this next log. Good to hear, anyway ive got a bench ecu here, flashing, reading, observing load times. I don't see any difference really, read and write speeds were the same between my new crom and the old crom that is out right now. I even timed them haha, read speed was 52.78 seconds, write speed was a minute and 35 seconds. Between the croms there was a +/- 2 seconds. I tested the logging and it was fine for more then 15 seconds, but i could only log battery volts since it was a bench ecu, i would need a car in here to test that to its fullest.

Don,

On your bench PCM can you test something for me?

Can you:
1) Flash a custom tune
2) Modify any parameter
3) Extract the tool modified Cutom tune via "Last tune written" and rename
4) Flash Original tune to PCM
5) Add renamed "Last tune written" to Tool
6) Flash renamed "Last tune written" back PCM
7) Extract last tune written again
8 ) See if tune in #6 contain JUST the Tool modified parameters.

This is the process I attempt to use when updating to a new crom.

I have attempted to "save" a slightly modified Custom tune of mine only to have it appear to ONLY keep the changes I had made with the tool at not ANY of the "custom tune" changes once I added it to the tool and reflashed it to the PCM.

Trinty USB so no usb/serial cable issues.

duster360 · Post by **duster360** » Mon Sep 28, 2009 12:06 pm

Krazyrdr83 wrote:Alright, well, I'm at work now, I could go disconnect for a bit, and then do a log later. as for the WGA, it's one of the original forge wga, had it on for 2 years, plus I bought it used. so the spring may be pretty weak. I do have an AGP wga that I have to send back for repairs.

My point was to get you to realize that PCM boost control kicks ass.

My perfectly good AGP wga sits in my garage. imo it does not provide any benfit over the stock wga + PCM/DS boost contol, only negatives(ptb)

Krazyrdr83 · Post by **Krazyrdr83** » Mon Sep 28, 2009 12:45 pm

duster360 wrote:
Krazyrdr83 wrote:Alright, well, I'm at work now, I could go disconnect for a bit, and then do a log later. as for the WGA, it's one of the original forge wga, had it on for 2 years, plus I bought it used. so the spring may be pretty weak. I do have an AGP wga that I have to send back for repairs.
My point was to get you to realize that PCM boost control kicks ass.

My perfectly good AGP wga sits in my garage. imo it does not provide any benfit over the stock wga + PCM/DS boost contol, only negatives(ptb)

you're not the first to tell me. but I have to purchase used solenoids (at least one) as one of the nipples broke off the solenoid that reads the boost coming from the wga...so i've been sol on that

SCGt94 · Post by **SCGt94** » Mon Sep 28, 2009 12:55 pm

This seems to be a new issue duster, i know what you are talking about. When i had matts car here it was the first time i have seen the issue. Apparently sometimes the tool won't apply changes you make to a tune. To get around this i have been applying a cal to the original backup with all my changes and resaving, which usually won't mess up.

duster360 · Post by **duster360** » Mon Sep 28, 2009 1:14 pm

SCGt94 wrote:This seems to be a new issue duster, i know what you are talking about. When i had matts car here it was the first time i have seen the issue. Apparently sometimes the tool won't apply changes you make to a tune. To get around this i have been applying a cal to the original backup with all my changes and resaving, which usually won't mess up.

I had seen Mike suggest the cal file work around on the CMR forum, but that sure doesn't help the rest us.

SCGt94 · Post by **SCGt94** » Mon Sep 28, 2009 2:37 pm

its an issue i will need to tackle coming up shortly....come on guys you know me, ill get it fixed. I just need some time to work on it. I got two tools that are being lame...the 6.4 tool and the this one. I am trying to fix tire size for them while working on this stuff for you guys, just give me some time.