closed loop-runs poor
Oct 8, 2008 | 11:32 PM
#21
Agree. You want at least one bank to be able to fuel independently.
In EFILive there is an IAT VE modifier table that you can use to adjust for temps. Not sure about HPT.
Running in OLSD the PCM runs in open loop, with no fueling correction at all. Just wanted to clarify - it sounded a little misleading when you said your truck runs off the wideband, like it's using the wideband to make fueling corrections. Also, check to see if there is an IAT correction table in HPT. It usually has the same features as EFILive, and EFILive does have the IAT correction table.
Once I get my VE tables dialed in I plan to go to CLSD so I don't have to retune for altitude, pressure, or temperature changes.
In EFILive there is an IAT VE modifier table that you can use to adjust for temps. Not sure about HPT.
Running in OLSD the PCM runs in open loop, with no fueling correction at all. Just wanted to clarify - it sounded a little misleading when you said your truck runs off the wideband, like it's using the wideband to make fueling corrections. Also, check to see if there is an IAT correction table in HPT. It usually has the same features as EFILive, and EFILive does have the IAT correction table.
Once I get my VE tables dialed in I plan to go to CLSD so I don't have to retune for altitude, pressure, or temperature changes.
So will you run semi-closed loop or full closed loop where the long fuel trims work?
Oct 8, 2008 | 11:36 PM
#22
Oct 9, 2008 | 11:20 AM
#23
ive been running OLSD for 6 months now. I plan on going clsd here someday. I think me Ve is finally done.
With the values i picked up of the efilive forum, my truck has been lean her recently. Ve was lined up with the approp temp and what not as well. I need some other ones to put in A0014. Got any thunder?
With the values i picked up of the efilive forum, my truck has been lean her recently. Ve was lined up with the approp temp and what not as well. I need some other ones to put in A0014. Got any thunder?
Oct 9, 2008 | 12:58 PM
#27
There really isn't any as far as I'm concerned. If you leave just the STFT's enabled you still get the use of your commanded fuel vs RPM table and the only time the STFT's run is when you are commanding stoich, all other times it's open loop. If you go full closed loop you lose the commanded fuel vs RPM table and go back to the PE table for enrichment, but I don't think that's all that big of a deal either as long as your VE table is set up right and you have the throttle PE enable parameter set up right. I tried this for a little while and it seemed to work ok. My VE tables were not quite right though and my LTFT's were positive, so once I got into boost it was adding the positive LTFT's on top of my commanded enrichment, so I disabled them until I get my VE tables all dialed in 100%.
Oct 9, 2008 | 01:10 PM
#28
I will probly end up in semi loop. I dont want to have to worry about teh LTFT dumping. Ive been OLSD so long im pretty comfortable either way. I really like the 3647 fueling table. Are u not using PE right now thunder. Mine is coming into PE at around half a psi of boost IIRC.
Oct 9, 2008 | 01:14 PM
#29
I will probly end up in semi loop. I dont want to have to worry about teh LTFT dumping. Ive been OLSD so long im pretty comfortable either way. I really like the 3647 fueling table. Are u not using PE right now thunder. Mine is coming into PE at around half a psi of boost IIRC.