Slow crank 2015 mustang gt - Page 2 - Ford Mustang Forum
Like Tree3Likes
LinkBack Thread Tools
SHELBY GT 350 Member
4.6L Member
S197 Member
JBert's Avatar
Joined: Jan 2011
Location: Central Massachusetts
Posts: 9,045
Originally Posted by MustangLife View Post
. . . . Most parts stores will test the batt and alternator free of charge to let you know the health of each. With that said go get the alt tested.
yeah but, in my experience at least, those battery tests are a waste of time and don't actually show when a battery is weak . . . I figured with the age of the car it probably was about due for a battery anyway and it's a fairly cheap troubleshooting step

MustangLife likes this.

| 2010 GT coupe | Daily Driver with some Steeda and GT500 take-off stuff for the occasional track day
JBert is offline  
Sponsored Links
SHELBY GT 350 Member
Strange Mud's Avatar
Joined: Apr 2011
Location: small town CT
Posts: 5,387
1st in with the suggestion to go to another shop. Aftermarket exhaust!?!?!?!? Unless it is something bizzaro that ain't what I would say and I would want some explanation before I agreed with/accepted that guess..

somewhat dangerous if you don't know what you are doing (have spray bottle of water and fire ext there) but try starting fluid that will point you towards fuel or spark issues.

2012 V6 traded in for a 2017 VW GTI.
Strange Mud is offline  
GhostStang14's Avatar
Joined: Oct 2013
Location: Dundee
Posts: 120
Originally Posted by Jg5.0hh View Post
I have a 2015 mustang gt
It has 40,000 miles
It takes about 6-7 seconds to start
Once it starts it drives good without any problems
I took it to a Ford Dealer and no codes came up, they checked everything and it all came up good
They told me it could be my aftermarket exhaust, any suggestions?
Sounds to me like fuel pumps weak. 😂 it’s your exhaust, what crap is that.

2015 Senior Master Ford Technician
GhostStang14 is offline  
franceshollnd's Avatar
Joined: Oct 2018
Posts: 5
Great information shared......
franceshollnd is offline  
Aero99's Avatar
Joined: Oct 2018
Posts: 1
Check fuel pressure at fuel line hight pressure and low pressure. If vehicle sit overnight and have difficulty start up, could be leaking check valve or leaking fuel injector.

Sent from my iPhone using Tapatalk
Aero99 is offline  
Sponsored Links

Quick Reply

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


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:


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