Lost Horse Power? - Ford Mustang Forum
 
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post #1 of 7 (permalink) Old 12-05-2015 Thread Starter
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Lost Horse Power?

Hey guys! I drive a 2012 5.0. Mods, jlt cai, full 3inch off road exhust, 3.73 gears, hurst short throw, and 91bama race tune.
Here is what's going on. I dropped off my car at a shop to put in my new clutch and off road 3' pypes xpipe. Clutch feels great, but HP feels lost? Yes I had a nw Bama tune sent to me since I changed my exhaust set up. I have the 3inch pypes x pipe with 3inch cat back flow master outlaw exhaust. 1st and 2nd gear pulls feel pretty close to before I dropped off my 5.0. But still feels a bit slower. 3rd gear and on my pulls feel like I have v6 ? Next week I have a dyno tune appointment to go e85 . will this fix my issue? Or could my exhaust set up not be as good as before? Or does anyone have a clue why my car pulls so weak compared to before I dropped it off?

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post #2 of 7 (permalink) Old 12-05-2015
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Reload the old tune and see how it feels, new tune could be weak.


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post #3 of 7 (permalink) Old 12-05-2015 Thread Starter
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I reloaded the old tune and its even worse. Plus engine light keeps coming on because old tune says I have cats when I don't. I'm hoping when I drop off for a personal dyno tune it will be better then now and better then before
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post #4 of 7 (permalink) Old 12-06-2015
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A dyno tune should fix your problem, if it's tune related.

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post #5 of 7 (permalink) Old 12-06-2015
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You need to do a crank relearn when any clutch work is performed.

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post #6 of 7 (permalink) Old 12-06-2015
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Any offroad pipe should gain you 12-15 whp with proper tune. I am not bashing tuners, but I went through 4-5 different revisions with your tuner and quickly moved on. I have their free tunes for life with some parts I purchased through AM. Picked up 2 tenths and 2 mph with Lund in similiar weather/DA. FYI.

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post #7 of 7 (permalink) Old 12-08-2015
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Scottmach is 100% right. You need to do a crank relearn when the flywheel is removed, the SCT X4 is capable of that. If it does not work, go see a dealer and they will do it (for a fee).
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