1999ssls1

iTrader: (71)

Here is my log from sspddmon - Michael-Jerry Tune.tun. I didnt have all the right PIDS active when I done it. I didnt know til after I started. The car felt way better, but had a slight miss sometimes in the the lower RPM range. I didnt get on it hard til near the end because of traffic. Thanks again guys and let me know watcha think.

SSpdDmon

iTrader: (10)

I'll check it out when I get home. The miss might still be too much timing in that region.

1999ssls1

iTrader: (71)

Ok thanks

SSpdDmon

iTrader: (10)

I pulled some timing since you were seeing Knock Retard in your log.

It's hard to tell what's going on in your log without any AFR feedback (nothing from the NBO2's and no WBO2).

Some things for concern...

You're logging WAY too many pids. You don't want to exceed 24 channels, which usually means less than 19 pids (because some take 2 channels). So, when you pick pids on the F8 tab, keep an eye on the bottom where it tells you how many of each you have.

It appeared you were seeing LTFT's in the log. Did you turn them back on after I turned them off? They looked like they were active, as if you were in closed loop.

Lastly, if you're still using the MAF, you need to log GM.CYLAIR_DMA - not GM.DYNCYLAIR_DMA. The second one is for speed density calculations.

Check the pic I uploaded below. It has some basic pids to log. Try logging just those and that should help you out.

1999ssls1

iTrader: (71)

I thought you said to run it in closed loop? In my case, should I still be using the maf sensor? I will the log the PIDS you listed and upload it. Thanks

edcmat-l1

iTrader: (10)

You sure this isnt what you were thinking^^? I didnt say run CL, just that if you decided too, to leave the LTFTs off.
As for running the maf, if the VE is not spot on, running the maf will make it more forgiving. If you want to dial in the VE, then turn off the maf, and set it up to tune in SD. Then once thats done, you can decide whether you want to re-enable the maf or not.

1999ssls1

iTrader: (71)

Ok I understand. Sorry for the confusion. I guess I will run back in open loop. Can I dial in the VE without having a wideband?

SSpdDmon

iTrader: (10)

You can try to get it close using the NBO2's, but only for areas where stoich is commanded. You really need a WBO2.

With the pids recommended and the tune I uploaded, you can keep an eye on the O2 voltages to get an idea of where your AFR is. Values less than 450~500mV are leaner than stoich. Values greater are richer than stoich.

edcmat-l1

iTrader: (10)

You can use the STFTs to dial in the VE. But as speed demon stated, you only wanna do the lower rpm part throttle stuff.

1999ssls1

iTrader: (71)

Here is a new log. Corrected with the 2nd tune. I unplugged the MAF for speed density. It blows out black smoke at idle and it didnt before hand. I guess the maf didnt compensate for the a/f.

edcmat-l1

iTrader: (10)

Theres more you need to do than just unplug it to get it in SD to tune. The black smoke just means the VE table is way off. It (the VE) needs to be tuned. If speed demon dont get ya straight, post up and I'll see what I can do. Do you know how to use your charts in the scanner?

1999ssls1

iTrader: (71)

I am all new to this. What all do I have to change for speed density mode? And no I really dont know how yo use the charts in the scanner.

edcmat-l1

iTrader: (10)

Sending a pm.......

SSpdDmon

iTrader: (10)

Read carefully... I didn't tell you to unplug the MAF - only to log the appropriate pid for your setup.

So, this 2nd log was with the MAF unplugged? Funny thing is, it appears when you get on the gas hard (>60% throttle), your O2mV were 920~930 for the most part. If that's a sign of anything, I'd say things are ok there. Spark wise, you may need to pull a degree of timing around peak torque if you continue to see knock retard there.

I'd be curious to see how the second tune does exactly how it is with the MAF plugged in. No unplugging sensors, no switching on closed loop or LTFTs, etc.

1999ssls1

iTrader: (71)

I will post a log with everything plugged in.

1999ssls1

iTrader: (71)

I plugged the maf back up and enabled trims and fixed closed loop temp enable. Let me know watcha think.

shoemike

iTrader: (25)

you are really wasting time and gas without a wideband O2,
and possibly risking damage to your motor.
especially if you are new to the tuning software and how
changes to your tune will make the car react.
i`m not trying to alarm you, just be careful.

SSpdDmon

iTrader: (10)

Either way....it looks lean with the MAF enabled based on the LTFT's. I don't quite understand why unless you're changing the tune that I uploaded. Also, you might want to check your throttle position sensor and wiring. It seems to be very jumpy.

1999ssls1

iTrader: (71)

Sorry I misunderstood what you typed. I will change it tomorrow then log. Another thing the traction control is only activated sometimes. I think I may have a bad tps wire.

SSpdDmon

iTrader: (10)

Just be careful if you do and keep an eye on O2 voltages. If they're constantly low (i.e. below 100mV), then you're running lean. WOT should see about 930mV.