5.3 first attemp at a tune may need some adult supervision

[Redtruck1]

5.3 first attemp at a tune may need some adult supervision



I have taken my 4.3 out of my 2001 Silverado and replaced it with a 5.3 whitch I added a GM stage 2 cam. I used a factory flash for a 2002 that has all the same equipment to get the truck running. I am having an issue with rough idle P0106 and p0121 codes, off idle and WOT seen to be good but still have a raw fuel smell whitch I am thinking my be fixed with injector timing.
cam specs
intake duration 227
exhaust duration 239
lobe separation 108
degrees overlap 17
lift 551
Is any help avalible


Attached Filestesting tune 24 DEGREES.hpt (464.9 KB, 0 views)

[Cyrperformance]

Are you running cats or deleted?

[Redtruck1]

All stock Cats o2s fuel pump intake just like factory.

[Cyrperformance]

Are you running a wideband gauge? And did you try some compares to any files in the repository?

[Redtruck1]

No wide band and wanted to try to get this tune I feel I am close, did not want to try another persons tune until understanding better.

[Cyrperformance]

Without a wideband it will probably be a little difficult, compare injector settings and pull a little 5-10% from idle area and see if that makes a difference.

[Redtruck1]

Cool I will give that a try thanks for the info.

[Cyrperformance]

Are you running the MAF?

[Redtruck1]

yes sir

[Cyrperformance]

If you calibrate the MAF then it should solve most of the issues if the injector data is correct.

[Redtruck1]

Do I use the Histogram method for calibration or is their a simple equation to figure out the calibration.

[Cyrperformance]

Look through the sticky' sand you will find it I believe posted from William Henn, a complete guide for MAF, VE etc. or order the Banish DVD which is pretty good for basic stock configuration tuning and larger cams. Summit sells it and some members sell them used a little cheaper some times.

[Cyrperformance]

http://www.hptuners.com/forum/showth...096#post121096

[Redtruck1]

Thanks looks simple even for me.

[Cyrperformance]

Just make sure your steady with the throttle and try not to let off. Find a long long stretch of road that is pretty empty. Run the scanner a couple times logging to get the feel for how it works. Just remember when you run up the scale hit stop scanning before you let off the throttle. Save the log before you shut the engine off then copy and paste special multiply % appropriately. I paste once then run log again and paste half. Then log again. The MAF is pretty simple.

[Redtruck1]

This may sound trivial but I am not having any luck adding MAF-STFT to the histogram list any sugestions

[edcmat-l1]

This may sound trivial but I am not having any luck adding MAF-STFT to the histogram list any sugestions

Make sure you have MAF Hz and STFT % bank 1 and 2 in your primary PID table. If you do not have them selected, the histogram will not come up.

Also, if you're trying to dial in a MAF or VE table using STFTs, make sure your LTFTs are disabled and zeroed.

[Redtruck1]

That's the ticket idles better but still have fuel smell out tail pipe. will take some time need a partner to control the laptop thinking the raw fuel smell will go the closer I get to 1.00.

[Cyrperformance]

Whenever you are using the scanner you have to have the PID's in the table to be able to use it in a histogram. Very important step when trying to log certain items. Glad to hear you are getting the hang of it. READ READ READ

[Redtruck1]

Now that I have this histogram thing figured out I have noticed a problem the vehicle will not down shift or fast accelerate from time to time very random. it has a code for tps performance but it is not current says passed you think the TPS is failing causing the shifting problem?