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07-30-2013, 09:22 AM
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#16
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Banned
Join Date: Apr 2013
Location: Gainesville,Tx
Age: 39
Posts: 2,405
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Originally Posted by 46tbird
ps - i don't like your 'idling rough' comment because that was the first symptom of my piston letting go. After about five miles of rough idling, the cel came on steady, then the next morning it began flashing. The piston on cylinder 8 had cracked the top ring land. Hope yours is something else.
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informative post.
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07-30-2013, 10:44 AM
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#17
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Senior Member
Join Date: Mar 2013
Age: 34
Posts: 1,047
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Originally Posted by 46Tbird
Mine got a steady Check Engine Light two days after the engine was replaced. It came back with random misfire codes for various cylinders. The dealer tech had to do a 'crankshaft position relearn' process and that cured it.
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Hmmm. My car had some crankshaft historical code brand new when I hooked it up to my scanner. I think it said relearn.
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2013 Race Red Mustang GT 6MT: 20" AMR's, GT500 AB, JBA LT's and ORX, SCT SF3/X3, MGW Short Throw, Some Carbon Wrap, Spoiler Delete, Eibach Sportlines, Koni STR.T's, BMR LCA's, BMR Relo Brackets, BMR UCA, Freedom Racing PHB, Maximum Motorsports CC Plates, BMR Safety loop, DSS Aluminum DS
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08-06-2013, 04:05 PM
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#18
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Senior Member
Join Date: Oct 2012
Location: Fort Worth
Age: 54
Posts: 119
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Thanks for all the input guys. I just got back in town late last night. Took the car down to Brenspeed this morning. They couldn't find anything wrong and the check engine light never came back. I figured while I was there, had them dyno tune it. 384.5 RWHP and 364.5 TQ in 97 degree heat. The last pull was 14 HP more than the 1st. I wasn't really concerned about the numbers, just wanted the tune dialed in better than the email tune. Car is running better than ever.
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08-07-2013, 08:03 AM
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#19
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Senior Member
Join Date: May 2013
Location: Dallas/Plano
Age: 35
Posts: 561
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Set it all back to stock. A good day worth of work but its worth it if your going to need a motor. Not saying you wheel, but it wouldn't hurt to drive around stock w/ stock tune and see if the issue still exist on the stock tune. If so, take it in under warranty once the light comes back on.
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2014 Oxford White 5.0 MT-82
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08-07-2013, 08:04 AM
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#20
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Senior Member
Join Date: May 2013
Location: Dallas/Plano
Age: 35
Posts: 561
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Okay nvm. I didn't catch there was a second page to this post lol. Glad its running better.
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2014 Oxford White 5.0 MT-82
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08-07-2013, 12:36 PM
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#21
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Senior Member
Join Date: Oct 2012
Age: 36
Posts: 884
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Mine came on for the first time in a about 5k miles. Ironically the day after I took it to the dealer for an oil change and 20k "check up" whatever They did me ok. Went off 48 hrs later (Monday Morning) So I guess I won't take it in. Don offered to hook it up and check the code at Kellers. Never did
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