I've had the car since new for about a year and a half now. Just hit 15,000 miles and the CEL comes on so I borrow a buddies sct to read the code. It was a #8 Mis. UUGGHHHH so brought it to ford and they said the coil was bad. They ordered a new one and I brought the car in today after them saying it was PERFECTLY SAFE to drive and they tell me it didnt fix the problem. So this SAFE issue is now internal damage and they have to pull the motor. Not to happy about this. This car has yet to have a single aftermarket performance mod done to it. This is why I've only done suspension and visual.

 

dang that sucks. At least you will get a new motor.

 

Dang that sucks man

 

You said "this is why I've only done suspension and visual." I'm guessing you already knew it would have this problem?

 

No it's just that after having a 6.0 and doing a bunch of motor **** which voided the warranty it cost me 10 grand out of pocket to fix it after I lifted and cracked the heads. So this time I decided to wait for my warranty to end before putting performance stuff in it. Although that truck is still my favorite vehicle to this day.

 

I wish I was gonna get one. But they will do everything possible to save them money.

 

Was there a miss at idle when cold?

 

Thats a very nice truck.

 

Honestly I had no clue clue there was a prob but I kept throwing the code

 

The worst part is a local guy bought it. So I se it all the time and it drives me nuts.

 

soooooo there are problems with #8 even on stock cars Hmmmmmmm!! Makes me feel bad for those with modded cars that had problems that didn't get covered.

 

Yup glad I chose to wait. I'm still waiting for them to find the problem

 

Can I ask the build date?

 

Kinda scary I'm glad I haven't voided my warranty yet.

 

I spoke with a couple of SVT guys at a local show the other day. I asked him where the ****** are in the 5.0 coyote. He said for all the thrashing they've put it through the only thing that comes up from time to time is the #8 jug running lean and sometimes burning a piston or exhaust valve. It was his opinion that this was most likely a situation that would only arise when driven extremely hard. In my opinion, if it runs lean when driven hard, it likely runs lean most of, if not all the time. I'm not going to get into it any further than that.

I will say the dealer you are working with needs to learn how to correctly troubleshoot and diagnose. They should be collectively spanked for sending you home with an eight cylinder car that's only banging on seven holes. Telling you it's OK is just unacceptable. After checking the fuel flow and ignition data, they should have performed a cylinder leak check and a compression check to determine what's going on if electrical checks proved OK.

Best of luck to you,
John

 

Not sure exactly its a mid 2011 model

 

TMS just added a VIN decoder

https://themustangsource.com/vindecoder.php

 

Man I agree, when they said it would be fine I was Kim skeptical about it. But they assured me it was fine. Then they told me the new coil didn't fix it and it was prolly an internal problem I was kinda pissed . But I guess me being pissed isn't gonna make a difference .

 

Is there a fuel starvation issue with #8 at WOT that is causing a lean condition?

Or does that pass the issue from #8 running lean to deficient cooling of the head in your opinion?

Lack of cooling has been brought up also.

 

Nice rig! I feel ya on the truck that's why I will not sell mine, I'd cry if I ever saw it on the street again. Mines a Silver 06' 6ohhhhhh and yes I will not be modding my new Mustang when I get it till it's out of warranty. Good luck with your car and I hope they make it right for ya man.....Here's a lil kick in the butt for dumping that truck....lol


I hate to do it to ya but I do love the Superduty and you sir had a fine one....Best of luck brother.....