Have a 2005 Mustang GT: cold air intake, intake manifold, comp 127500 cams and phase limiters, full exhaust with o/r h-pipe. Raced the car since 2006, been slowly putting suspension back to street.
I've used custom tunes from 2 private tuners over the years, the first one was a significant help getting the car into the 11s on motor, the second one was on a whim while getting some repairs out of state. Both tunes have run fine, the latter through the last year.
The tunes were on an old Xcal 2 and I felt it was time to get something newer, so I shopped a bit with well known Mustang aftermarket companies and found an xcal 4 and with coupons and promo codes for a good price and it came with two tunes. Fill out the sheet, yada yada. first set of tunes didn't work (crank but no start) and blew the dash fuse, called support and adjustment for "problems seen with C&L manifolds" sent, then the car ran fine on both tunes, very well in fact. But, both tunes throw p0021 for "A" Camshaft Position - Timing Over-Advanced or System Performance (Bank 2) about 5 minutes on the road, whether I baby it or gun it. Am told by tech support that only one bank having the problem is a hardware issue, and not in the tune. Ok, seems coincidental, but I guess I can see the logic not knowing all that much about tunes. I've depended on expertise elsewhere.
Searched here on the forum and elsewhere. I am in a $$$ cycle that means nearly no funds for repairs, so I have to really try to diagnose this issue on my own or through friends and good hourly rates. I've heard everything from radio frequency interference from the alternator (which isn't throwing codes but keeping the battery charged has been an off and on battle since purchase) to the VCT solenoid to the timing chain to other somewhat esoteric issues with the VCT system. I need to be smart about how I spend money the next few months, and not just start buying parts hoping I get a hit.
I could really use some advice on the steps to diagnose this, a logic tree if you will. Your help is much appreciated. Many Mustangs have come and gone since I purchased the 2005 brand new in January 2005, and this one has been nearly flawless regarding problems, and has been a consistent beast at the track. Shit happens, so I want to fix the shit and enjoy the car on the street for a bit. Frustrated, obviously.
Thanks in advance.
John
I've used custom tunes from 2 private tuners over the years, the first one was a significant help getting the car into the 11s on motor, the second one was on a whim while getting some repairs out of state. Both tunes have run fine, the latter through the last year.
The tunes were on an old Xcal 2 and I felt it was time to get something newer, so I shopped a bit with well known Mustang aftermarket companies and found an xcal 4 and with coupons and promo codes for a good price and it came with two tunes. Fill out the sheet, yada yada. first set of tunes didn't work (crank but no start) and blew the dash fuse, called support and adjustment for "problems seen with C&L manifolds" sent, then the car ran fine on both tunes, very well in fact. But, both tunes throw p0021 for "A" Camshaft Position - Timing Over-Advanced or System Performance (Bank 2) about 5 minutes on the road, whether I baby it or gun it. Am told by tech support that only one bank having the problem is a hardware issue, and not in the tune. Ok, seems coincidental, but I guess I can see the logic not knowing all that much about tunes. I've depended on expertise elsewhere.
Searched here on the forum and elsewhere. I am in a $$$ cycle that means nearly no funds for repairs, so I have to really try to diagnose this issue on my own or through friends and good hourly rates. I've heard everything from radio frequency interference from the alternator (which isn't throwing codes but keeping the battery charged has been an off and on battle since purchase) to the VCT solenoid to the timing chain to other somewhat esoteric issues with the VCT system. I need to be smart about how I spend money the next few months, and not just start buying parts hoping I get a hit.
I could really use some advice on the steps to diagnose this, a logic tree if you will. Your help is much appreciated. Many Mustangs have come and gone since I purchased the 2005 brand new in January 2005, and this one has been nearly flawless regarding problems, and has been a consistent beast at the track. Shit happens, so I want to fix the shit and enjoy the car on the street for a bit. Frustrated, obviously.
Thanks in advance.
John
