New Tune after cam
09-15-2012, 10:53 AM
#1
New Tune after cam I just finished a cam install. I have the idle nice and where I want it. I am about to start the LTFT tuning. Right now I have my MAF unplugged and tuned out. Is there any reason that I would ever need to put the MAF back into the quation? Or can I continue to run SD without an issue? If so, what can I do about removing the MAF from the picture completely? Thanks!
09-15-2012, 12:12 PM
#2
TECH Fanatic
iTrader: (5)
Join Date: Sep 2008
Location: Salem/Keizer
Posts: 1,120
Likes: 0
Received 0 Likes
on
0 Posts
Plug the MAF back in, and disable it in the tune.....you need to have the IAT (in the MAF) working to be able to tune the car accurately. If you want to permanently remove it, you'll have to make sure that you have an IAT installed elsewhere in the system.
09-15-2012, 02:34 PM
#3
From what I understand, it is better for me to tune ltft with the MAF unplugged so that the PCM is not altering fuel mixture. Once I am one with the tuning of the ltft though what is the best method for getting rid of the MAF or should I just plug it back in and tune that as well?
09-15-2012, 04:26 PM
#4
isn't the IAT sensor the one in the lid?
I've had better luck tuning with STFT's on my bolt on car. I tried LTFT, LTFT+STFT, and just STFT and so far it's been way easier as long as you have the hit count at 5 or 10. Plus you don't have to drive 100 miles after every change to let the car learn the trims. I fail the MAF by setting the fail frequency to 0Hz, set the P0103? to MIL on first error but uncheck the light, copy high octane to low octane spark, and make changes in the secondary VE table (if your year has it). And make sure you have the car at operating temp and reset the fuel trims each time, I know you probably know most of this but I've made those mistakes a few times and I wasted a ton of time hahah.
I've had better luck tuning with STFT's on my bolt on car. I tried LTFT, LTFT+STFT, and just STFT and so far it's been way easier as long as you have the hit count at 5 or 10. Plus you don't have to drive 100 miles after every change to let the car learn the trims. I fail the MAF by setting the fail frequency to 0Hz, set the P0103? to MIL on first error but uncheck the light, copy high octane to low octane spark, and make changes in the secondary VE table (if your year has it). And make sure you have the car at operating temp and reset the fuel trims each time, I know you probably know most of this but I've made those mistakes a few times and I wasted a ton of time hahah.
09-15-2012, 04:49 PM
#5
isn't the IAT sensor the one in the lid?
I've had better luck tuning with STFT's on my bolt on car. I tried LTFT, LTFT+STFT, and just STFT and so far it's been way easier as long as you have the hit count at 5 or 10. Plus you don't have to drive 100 miles after every change to let the car learn the trims. I fail the MAF by setting the fail frequency to 0Hz, set the P0103? to MIL on first error but uncheck the light, copy high octane to low octane spark, and make changes in the secondary VE table (if your year has it). And make sure you have the car at operating temp and reset the fuel trims each time, I know you probably know most of this but I've made those mistakes a few times and I wasted a ton of time hahah.
I've had better luck tuning with STFT's on my bolt on car. I tried LTFT, LTFT+STFT, and just STFT and so far it's been way easier as long as you have the hit count at 5 or 10. Plus you don't have to drive 100 miles after every change to let the car learn the trims. I fail the MAF by setting the fail frequency to 0Hz, set the P0103? to MIL on first error but uncheck the light, copy high octane to low octane spark, and make changes in the secondary VE table (if your year has it). And make sure you have the car at operating temp and reset the fuel trims each time, I know you probably know most of this but I've made those mistakes a few times and I wasted a ton of time hahah.
09-15-2012, 09:24 PM
#12
TECH Fanatic
iTrader: (34)
Join Date: Jun 2004
Location: lancaster,pa
Posts: 1,625
Likes: 0
Received 0 Likes
on
0 Posts
i am very new to tuning so i can't speak with any serious backing but i can give you my experience so far. i tuned my VE table using LTFT's and the car drove pretty well. i then tuned the MAF using LTFT's and the car drove even better. i then got a wb and went back to the maf and it drives far better than the last pro tune i had. It seems like the Maf would add only add some flexibility and drivability to the setup. i think an sd tune would be ok but a properly done tune with the Maf would be far better for the mods you have now. JMHO
