[Vincy]

Upgraded my clutch with a McLeod RXT and steel flywheel in my 2017 GT with dealer installed Roush SC. Bought brand new. Only 3000k on the clock. After 9 days at dealership and Roush latest update, misfire codes persist. Roush is saying to put the stock clutch back in the car. They claim that the McLeod clutch is the issue and that they sell all the Roush cars with stock Mustang clutch. My stock clutch went at 2700 miles. Anything about 4000 rpm it was slip. I researched the crap out of clutches and everyone is running the McLeods... I need some serious help. If any experienced mechanic or Ford tech who reads this and have dealt with this issue before I would greatly appreciate the help. I am hurting...

 

[Mile high JDF]

Um why the **** would a clutch cause a misfire... I'd take it to a different dealer and get a second opinion.

 

[bucko]

Um why the **** would a clutch cause a misfire... I'd take it to a different dealer and get a second opinion.

I'm thinking because the clutch is slipping, and causing a higher rev perhaps to the rev limiter, hence the misfire.

 

[Vincy]

No there is a new clutch it. It use to slip with stock. That has since been upgraded with McLeod RXT twin disc and flywheel. There is no clutch slip. But misfire codes continue.

 

[1 Alibi 2]

Have the dealership & Roush figure it out, when you're happy with the results, pay the bill !
.

 

[Vincy]

They wanna put stock flywheel and clutch back in...

 

[Grabber Blue5.0]

The car needs a crank relearn done since you replaced the clutch. Very easy to do.

And FYI that clutch will break the manual transmission rather quickly.

 

[Rapinator126]

Definitely a crank re-learn. Blows my mind the dealer didn't know that.


Sent from my iPhone using Mustang Evolution

 

[Vincy]

Mechanic said in printed report " Chris at Roush states probable defect or imbalance in aftermarket clutch" then they hit me for $907.05 and the car is still not fixed. Called Roush and they say to put stock clutch back in to prove. So after $4200 invested I am still without a fix. Called Ford Motor Company and of course they said I installed an after market clutch so am screwed. This is my third Ford vehicle... and I am hurting...

 

[Grabber Blue5.0]

Did you even read posts #7 and #8? You asked for advice and then when it was given you just ignored it.

 

[Cobrakit]

The crank sensor for the ignition is very long and is located on the back of the block heading to the crank. There was a TSB out 2013 about random misfires, which i assume you had vice a specific cyclinder. So long story short, as was said, anytime you replace the clutch you need to do a Relearn. If you have an aftermarket tuner, you can do yourself. OBTW random misfires may not create driving problem, but will richen mixtute and in my case blew out both cats. Luckly under warranty.

 

[Vincy]

My apologies. Did not ignore any responses. I appreciate them tremendously. I did read all responses. The mechanic said he did the relearn 8 times and to no avail. The dealership and Roush are blaming the RXT twin disc itself. ugh

 

[Grabber Blue5.0]

First what is the actual misfire code?

What are you using to tune your car?

I still think you need a crank relearn and it's not being done properly. Car has to be warm when being done. That's often overlooked.

 

[Vincy]

P0302 and P0300. I have the latest Roush calibration on it from the dealer. They spent 9 days with the car checking multiple things and have come to the conclusion that the RXT twin disc clutch is to blame.

 

[Vincy]

I really wanna believe it is the relearn... the mechanic in an irate tone when I asked about same said it is a very simple thing and he did it at least 8 times...

 

[ab_mach1]

So, is this a Roush Mustang, or a brand new Mustang with an SC installed by a dealership?

 

[natestang07]

Try doing it yourself

Sent from my VS985 4G using Mustang Evolution mobile app

 

[Cobrakit]

P300 is random misfire which is what i would expect. 302 is #2 cyclinder which is a sepetate issue i would guess.

 

[Vincy]

Brand New GT with dealer installed Roush Phase 2 SC,... the LFP 727 from Lebanon Ford.

 

[Vincy]

I don't have a tuner