spark being reduce by coolant temps some how

[RonnieW]

01Z06 Jan 2013 last.tunLog_0103.efi

I am logging PID for EST-Coolant temperature spark. It is showing that it is reducing my spark at times during WOT. I looked at all the coolant tables that I can find but don't see why it is reducing the spark. I tried to attach the log and tune above. I'm not sure it worked. I'll try again if they don't show up after I post this. Thanks for any help. The tune is in progress so just over look where there hasn't been any smoothing for now.

[darcy]

Hi Ronnie

I understand this tune is a WIP, but there are a couple of items, other than the missing spark, that I think you should address.
There is an out of range value for a the P0101 DTC processor that you should fix.
It appears to be MAF-less tune by the way the MAF fail frequencies are set, but with the DTCs set to Not-Reported, it won't go into SD mode. Set P0101, P0102 and P0103 to 1-trip.
Is there a reason you are commanding leaner mixtures untill you come upto 90deg ECT?
I'd try and flatten that boost VE table out a bit with some manual smoothing of peaks and troughs, and some interpolation.

Sorry, I can't offer any insight into you ECT timing though, the ECT spark tables look like they should not interfere.
Also, if you can reduce the number of channels you're logging at onece to 24, currently 36, this will improve the logging frame rate.

cheers
darcy

[joecar]

There are some other DTC's in C6001 that are OOR... set them to a different value, save file, exit tunetool (important step), restart tunetool, set them to correct value.

[joecar]

+1 what darcy said on P0101,2,3... to run from the VE the PCM has to first see a MAF DTC.

Also, general comments:

when you finish tuning, set A0000 to disable, and make B5914 lower than B5913.

set B3609 to all zeros.

[joecar]

Which frame # do you spark advance dropping...?

When you link the scantool chart inspector/cursor to the tunetool you will see that the discontinuities in B5913 (troughs, steps) will give rise to spark dropping a little (due to interpolation)...

foe example, where B5913 drops from 26° to 17°, you see 20° in the log, or B5913 dropping from 19° to 15° shows up as 17° in the log.

[darcy]

Which frame # do you spark advance dropping...?

Frames 5282-5300, Joe.

[RonnieW]

Thanks guys for the input. I'll address the issues you have brought up so far. Some I will have to study to make sure I understand them.
Yes Joe, the frames Darcy noted, 5282-5299 or so.
Changed P0102 and P0101 to "1 trip emissions related". P0103 already there (I had thought the P0103 tripping would be all I needed to go into SD.
B3609 changed to all zeros
Not sure what the OOR (out of range??) DTC's are in C6001
Darcy, where are you talking about when you say "commanding leaner fuel below 90 deg ETC,
.
I appreciate any and all comments. I am learning as I go. I'm sure I'm hacking some of the tables up but hope to get them all figured out in the long run without blowing the engine. I had the initial tune done by a local shop when I went SD. I have since changed the heads, cam and injectors and bought EFILive.
As info: 347 cu TT Z06 that I have changed over to an automatic. 83# injectors

[darcy]

Yes, Ronnie, OOR is Out Of Range.
If you scroll down through the C6001 you'll notice that P0443, P0452 are dog-eared. (Little blue triangles in the corner of the cells).
There are OOR cells in your IAT VE Multiplier table too. A0014.
It's probably worth going through every table to find anythigin else.

About the fuel; A0008 is multipling your commanded fuel, as set by B3647, by 90% upto 80C (176F)., commanding EQR = 0.895 when cold.

The commanded AFR in that log seems odd too. It appears to follow DYNCYLAIR_DMA exactly. Not sure what's going on with that.

Injector flow rate looks about right for 83lb/hr injectors operating at 4bar.Assume you have a manifold referenced FPR by the flat line?

[RonnieW]

C6001 doesn't show any dog-ears on my computer
I changed the multiplier in A0014 to get rid of the dog ears
Not sure why A0008 is set to .90. I'll try it at 1.00
regulator is referenced
Not sure about the commanded AFR you referenced.
I will go through the tables to see if anything else is OOR

Thanks for the input. I'll take all the help I can get. I still wish I knew why I'm loosing timing due to ECT!

[joecar]

In C6001, scroll down to P0442 and P0452 (dogears).