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Mustang Forums
2011-2014 Mustangs
Engine/Tuning
2013 5.0 GT will not reset O2/Catalyst Emission Monitors
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<blockquote data-quote="DD2000GT" data-source="post: 15478526" data-attributes="member: 4538"><p>Updating - because I like to research issues myself and when there is a resolution it is good to know what fixed it...</p><p></p><p>What I know - the GT I bought used had a CAI and FRPP 90mm TB (along with FRPP lowering springs, a Flowmaster Outlaw after axle mufflers, JLT oil catch, BOSS valve covers, and maybe more I have not discovered). It ran great when I first got it, but would not ready the emission monitors after a battery swap - so it had to have had a tune on it.</p><p></p><p>What I "think" - when I took it to the dealer because of the monitors, they flashed it back to stock to resolve the issue. They refused to tell me they did this however because the car was bought from them and a "Certified Pre-Owned" car and they did not want to say it had a warranty-voiding tune on it. Plus, if they broke something flashing it back to stock they could deny. But - the car surged horribly in first gear when cold and RPS hung for ~2 sec. when you lifted, also, fuel economy dropped from 24 highway to 16 after the dealer visit.</p><p></p><p>What I did - bought a SCT tuner with preloaded Bama V2 93 octane performance tune configured for the CAI and 90mm TB. Yes, my research showed the Bama tunes were pretty pedestrian, but if I go with the AED tune I want in the future I needed the SCT tuner anyway...</p><p></p><p>What I discovered - holy shit does the car run better now! No bucking, better idle, and butter smooth pedal response. Seat of the pants gains of just a bit, but the drivability is now enjoyable - hell I dare say fun again. So, in the end - the stock tune on the FRPP TB was the cause - all of this unknown to me or refused to be divulged. I may just stick with this Bama tune if the datalogging shows safe A/F ratios - it made that much difference.</p><p></p><p>Glad for two things - this nightmare if finally over - and it is a nice sunny fall day here in Texas to datalog my new tune!</p><p></p><p>Cheers all, and thanks for the assistance.</p></blockquote><p></p>
[QUOTE="DD2000GT, post: 15478526, member: 4538"] Updating - because I like to research issues myself and when there is a resolution it is good to know what fixed it... What I know - the GT I bought used had a CAI and FRPP 90mm TB (along with FRPP lowering springs, a Flowmaster Outlaw after axle mufflers, JLT oil catch, BOSS valve covers, and maybe more I have not discovered). It ran great when I first got it, but would not ready the emission monitors after a battery swap - so it had to have had a tune on it. What I "think" - when I took it to the dealer because of the monitors, they flashed it back to stock to resolve the issue. They refused to tell me they did this however because the car was bought from them and a "Certified Pre-Owned" car and they did not want to say it had a warranty-voiding tune on it. Plus, if they broke something flashing it back to stock they could deny. But - the car surged horribly in first gear when cold and RPS hung for ~2 sec. when you lifted, also, fuel economy dropped from 24 highway to 16 after the dealer visit. What I did - bought a SCT tuner with preloaded Bama V2 93 octane performance tune configured for the CAI and 90mm TB. Yes, my research showed the Bama tunes were pretty pedestrian, but if I go with the AED tune I want in the future I needed the SCT tuner anyway... What I discovered - holy shit does the car run better now! No bucking, better idle, and butter smooth pedal response. Seat of the pants gains of just a bit, but the drivability is now enjoyable - hell I dare say fun again. So, in the end - the stock tune on the FRPP TB was the cause - all of this unknown to me or refused to be divulged. I may just stick with this Bama tune if the datalogging shows safe A/F ratios - it made that much difference. Glad for two things - this nightmare if finally over - and it is a nice sunny fall day here in Texas to datalog my new tune! Cheers all, and thanks for the assistance. [/QUOTE]
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2013 5.0 GT will not reset O2/Catalyst Emission Monitors
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