2018 GT S550 Intermittent Stalling - Ford Mustang Forum
 
LinkBack Thread Tools
post #1 of 4 (permalink) Old 3 Weeks Ago Thread Starter
Rookie
 
robvanvoorhis's Avatar
 
Joined: Nov 2019
Posts: 2
 
2018 GT S550 Intermittent Stalling

Hello Folks

My 2018 GT S550 has a Roush Phase 1 Kit. After 1 year of perfect enjoyable driving, out of the blue the engine began to intermittently stall, usually when rolling up to a stop light or sign. I have the 10sp auto, has anyone experienced anything like this? Roush, after having an open repair ticket with them for 130 days has decided my long tubes are to blame??? They reflashed their tune, changed the throttle body and a few other very minor things to no avail. They say the solution is to go back to factory exhaust or do a custom tune, any thoughts?

Thanks - Rob

robvanvoorhis is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old 3 Weeks Ago
MACH I Member
 
pikapp's Avatar
 
Joined: Feb 2006
Posts: 2,676
 
Garage
Are the LT headers all you've done to the car? In most, if not all cases, adding mods that change the Air/Fuel mixture, i.e. headers, you'll need a new tune. The tune Roush installed is a very conservative tune (EPA standards) and is based on what they do to the car, not what the owner may do...later. My guess is, you need a new tune, running a bit tooooo lean. If you decide to get a new tune, seek out a speed shop that is well known for dyno tunes, the only way to get a perfect tune just for your car.


IF MY CAR WENT AS FAST AS THE MONEY I SPEND ON IT, I'D WIN EVERY RACE
pikapp is offline  
post #3 of 4 (permalink) Old 3 Weeks Ago
SHELBY GT 350 Member
4.6L Member
S197 Member
 
JBert's Avatar
 
Joined: Jan 2011
Location: Central Massachusetts
Posts: 9,045
           
did the problem start right after installing the LT headers? if yes, that's a sign . . .

and yeah I would assume it needs a custom tune for the headers, since they change the location of the O2 sensors which affects the signal going back to the computer

| 2010 GT coupe | Daily Driver with some Steeda and GT500 take-off stuff for the occasional track day
JBert is offline  
 
post #4 of 4 (permalink) Old 3 Weeks Ago Thread Starter
Rookie
 
robvanvoorhis's Avatar
 
Joined: Nov 2019
Posts: 2
 
Thank you!
robvanvoorhis is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a VALID email address for yourself, otherwise you will not receive the necessary confirmation email needed to confirm, validate and activate your new AFM member account.

Failure to provide a VALID email address, will result in the cancellation of your new AFM member account registration.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome
 


Search Engine Friendly URLs by vBSEO 3.6.1