07 GT SCT tune issues
11/2/16, 06:32 PM
#1
Member
Thread Starter
Join Date: November 2, 2016
Posts: 4
Likes: 0
Received 0 Likes
on
0 Posts
07 GT SCT tune issues
Hi, I am new here, just recently purchased my used 07 Mustang GT ( 85K ) . Anywho here is my problem and I am hoping I came to the right place for some good advice.First off the vehicle is a 2007 Mustang GT ,4.6 liter, 3 valve 5 speed manual with a 3.31 rear differential. I just installed a JLT series 3 cold air intake and a BBK, 62 mm throttle body.I used the SCT X4 tuner afterward and the car hesitates and keeps throwing the 0171 and 0174 trouble codes( banks 1 and 2 lean). What is the problem? Do I need to purchase a custom tune? Also on the WOT variable I set at 2%; Can I go higher ? Any help is greatly appreciated.
11/3/16, 05:34 AM
#2
Shelby GT350 Member
I assume you're using one of the canned tunes on the tuner, does it account for the extra air with the intake and throttle body? Your canned tunes are usually setup for a stock engine and they change the A/F and timing based on the octane fuel your using. Where did you get your tuner? They maybe able to adjust the tune to account for your mods, I know places like AM do.
11/4/16, 06:51 AM
#4
Shelby GT350 Member
The DTC description says your running too lean, you're taking in more air than the computer expects, and to check for vacuum leaks around the intake, PCV, oil dipstick and MAF sensor. It also says to check for exhaust leaks before the 02 sensors. Have you called the place you got the intake from and ask them?
11/4/16, 10:19 AM
#5
Member
Thread Starter
Join Date: November 2, 2016
Posts: 4
Likes: 0
Received 0 Likes
on
0 Posts
Yes I called the tuner tech support. In talking with them they checked and saw that the tuner was two updates behind ,so I had to return the car to stock, update tuner, and reprogram. Also I was inputting the tune for a regular JLT intake and not the series 3 which I purchased. Tech said that would make a big difference. It sounds and feels better and no codes sitting in the driveway. I am getting ready to test drive shortly. This may have fixed it. Also there is a WOT ( wide open throttle ) variable that has 2%-14% richer fuel to air mixture adjust. settings. I went with 14% and will see how that feels. Hopefully not too much for my setup!
11/4/16, 12:05 PM
#6
Yes I called the tuner tech support. In talking with them they checked and saw that the tuner was two updates behind ,so I had to return the car to stock, update tuner, and reprogram. Also I was inputting the tune for a regular JLT intake and not the series 3 which I purchased. Tech said that would make a big difference. It sounds and feels better and no codes sitting in the driveway. I am getting ready to test drive shortly. This may have fixed it. Also there is a WOT ( wide open throttle ) variable that has 2%-14% richer fuel to air mixture adjust. settings. I went with 14% and will see how that feels. Hopefully not too much for my setup!
11/4/16, 01:47 PM
#7
Member
Thread Starter
Join Date: November 2, 2016
Posts: 4
Likes: 0
Received 0 Likes
on
0 Posts
Everything good at this point. Definitely more giddyup. No issues that I can detect with the WOT setting at 14%. I may play around with it a bit to see if there are any differences. Also the WOT variable is only on during full throttle acceleration, not entire time engine is running. I would highly recommend the JLT series 3 CAI paired with the SCT -X4 tuner. Lots of variables for mods. like headers, exhaust,spark timing, rear gear swaps, etc., and good customer tech support. Thanks for everyone's advice.