View Full Version : Throttle Cracker - No CPP due to being a Holden PCM
bimbleuk
September 29th, 2013, 08:42 PM
I've got some low speed surge on a mildly cam'd LS1 (M6 - manual).
I've rear several thread and understand how the TC & TF might help with this.
However I've logged the IAC_TC_DMA & IAC_TF_DMA on both a 1221256 & COS5 OS the TC PID is showing basically zero adjustments. The TF is adding air to match any changes I make to tables.
As I don't have a CPP switch or the wiring as I'm using a Holden based wiring loom & PCM. Maybe an automatic OS might get the TC tables working again?
Any other suggestions would be appreciated.
bimbleuk
September 30th, 2013, 04:19 PM
I think I'll try the 12225074 OS which was originally on my PCM.
I have a choice of two files one from an auto and one from a manual. Is there actually a difference in the software? Both are 12225074.
joecar
October 1st, 2013, 06:21 AM
Is there a way to add a CPP switch...?
bimbleuk
October 1st, 2013, 06:56 PM
Is there a way to add a CPP switch...?
I will check at the weekend as I'm not near the car but there may not be a pin on my connector. On the Holden autos that pin is Blue/White and connects to PRNDL A.
So I may be able to add a pin and use the 1221256 OS but I've got a custom converted car with a bias pedal box and it's a lot more hassle than finding an OS that will work without one. I'll try the Holden OS on the PCM and post back the result.
bimbleuk
October 6th, 2013, 12:01 AM
OK so I copied over all the tables from 1221256 LS1B 512K PCM to my original Monaro (Holden/HSV) 12225074 LS1B 512K tune which took a while!
I reprogrammed the PCM with the new OS and went for a drive. Immediately I could see the IAC_TC_DMA PID was logging consistent values and my surge has 99% gone. I have some transmission slop so it will never be perfect and there may still be some fine tuning but I now have the Cracker tales working without a CPP clutch switch.
Maybe this is worth a sticky?
Only downside is the LTFTs have shifted a bit so it probably needs a few CALC.VET etc. runs to get them close again.
joecar
October 6th, 2013, 11:43 AM
OK, stickied (and I'll work it into the collected links thread).
Highlander
September 5th, 2014, 12:50 PM
I can actually change in the cal to eliminate the CPP.
Happy Jim
September 8th, 2014, 07:00 AM
I can actually change in the cal to eliminate the CPP.
Interested how to do this as my retrofit also doesn't have a CPP - can you share?
Thanks
Jim
Highlander
September 8th, 2014, 01:41 PM
No, cannot, but I can fix it... send email to desaintpreux at gmail dot com.
Happy Jim
September 8th, 2014, 10:17 PM
No, cannot, but I can fix it... send email to desaintpreux at gmail dot com.
Mail sent
Regards
Jim
Highlander
September 8th, 2014, 10:55 PM
The CPP is disabled in this calibration.
Highlander
September 8th, 2014, 10:56 PM
Is this a manual car?
Happy Jim
September 8th, 2014, 10:58 PM
Hi, Yes mine is manual
Highlander
September 8th, 2014, 10:58 PM
So you need me to enable the CPP switch?
Highlander
September 8th, 2014, 11:00 PM
There are 2 modes for the switch... 1 to ground 2 to ign... which is it you want?
Highlander
September 8th, 2014, 11:01 PM
Throttle Cracker is disabled...
you have b4311 b4312 maxed out.... what cam is in this car?
Highlander
September 8th, 2014, 11:02 PM
What transmission do you have? Gear ratios????
Happy Jim
September 8th, 2014, 11:02 PM
Hi Christian, I have no CPP switch fitted in my car, as long as the ECU isn't "expecting" an input then all is good (I have a feeling that from what you've said above that may already be the case....in which case I apologise for wasting your time)
Regards
Jim
Happy Jim
September 8th, 2014, 11:03 PM
Throttle Cracker is disabled...
you have b4311 b4312 maxed out.... what cam is in this car?
Thunder Road TR230 (226/230 reverse split off the top of my head)
Highlander
September 8th, 2014, 11:04 PM
No, no problem.. its disabled
but the test is running for CPP OBD2 wise.... I can disable that too.
Happy Jim
September 8th, 2014, 11:05 PM
No, no problem.. its disabled
but the test is running for CPP OBD2 wise.... I can disable that too.
Yes please.
There are times when Virtual Beers would be really handy to give out :-)
Highlander
September 8th, 2014, 11:06 PM
What gear ratios are in your transmission? where did you get this cal from? did you do a segment swap? does your tranny have the temperature sensor?
Highlander
September 8th, 2014, 11:18 PM
Try the file I sent you... has the CCP OBD2 test disabled to be sure... The surging was caused for different reasons... all which i have fixed (hopefully, every car is different).
Basically you had idle closed loop control enabled 100% of the time... that is a completely different routine.
Highlander
September 8th, 2014, 11:21 PM
Sorry,
you have closed loop disabled... any reason why?
Highlander
September 8th, 2014, 11:22 PM
Still.. my changes should fix your surging issues while coasting in neutral.
Happy Jim
September 8th, 2014, 11:30 PM
What gear ratios are in your transmission? where did you get this cal from? did you do a segment swap? does your tranny have the temperature sensor?
2.66:1 1.78:1 1.30:1 1.00:1 0.74:1 0.50:1
Original cal was 2000 Camaro, then upgraded to COS3 (did it a while back so can't remember how, but followed the tutorial),
Tranny temp sensor....nope
CL disabled as I have zero O2 sensors fitted (or cats or anything else vaguely emissions related).
I'll go try the file you sent
Huge thanks
Jim
Highlander
September 8th, 2014, 11:40 PM
Email Resent... disabled O2s Permanently.. disabled heater routines. Disabled O2 Tests... Disabled pretty much any use of the O2 sensors. (it should free some headroom)
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