1968 mustang won't start - Ford Mustang Forum
Like Tree1Likes
  • 1 Post By Ivy66GT
LinkBack Thread Tools
post #1 of 8 (permalink) Old 4 Weeks Ago Thread Starter
Himalayabpatel's Avatar
Joined: Sep 2019
Posts: 2
1968 mustang won't start

A few weeks ago, I was able to drive my 68 mustang for as long as i wanted, parked somewhere came back, fired right up.

Then after some time, the car would fire right up, works fine, but then if I turned it off, it would not start back up easily, I would have to crank a few times and it would start up again.

After some more time, the car could stay on as long as i kept it on, but once I turned it off, it would not turn back on unless I waited 6+ hours or i'd just try the next day and it would fire right up.

Recently, it turned on, but after 15-20 minutes, it would die, Can't get it to turn on unless i try the next day.

Now, car doesn't turn on at all, just cranks.

Any idea what is going on here? How should I begin to troubleshoot? Any guides out there would help too.

Himalayabpatel is offline  
Sponsored Links
post #2 of 8 (permalink) Old 4 Weeks Ago Thread Starter
Himalayabpatel's Avatar
Joined: Sep 2019
Posts: 2
I forgot to mention, when i noticed this issue was happening, there's a small coolant leak coming from the timing cover seal, it only happens after i turn off the car. I have been topping off the coolant since. no other leaks, all fluids normal

Himalayabpatel is offline  
post #3 of 8 (permalink) Old 4 Weeks Ago
BOSS Member
Beechkid's Avatar
Joined: Apr 2013
Location: SoCal
Posts: 4,315
It takes air, fuel and spark to run.... check the automatic choke 1st...it may be hanging up, second- carb float, you may have a leakdown once the engine gets hot, 3rd- carb heat soak.

Member: Never trust a person over 40 who drives a Chevy club
Flatheads ain't so bad!
Certified backyard mechanic I & II
Beechkid is online now  
post #4 of 8 (permalink) Old 4 Weeks Ago
PONY Member
JustAnotherRuki's Avatar
Joined: Oct 2014
Location: Fort Myers
Posts: 499
Originally Posted by Himalayabpatel View Post
I forgot to mention, when i noticed this issue was happening, there's a small coolant leak coming from the timing cover seal

Are you sure is not the water pump seal? If it's in fact the timing chain cover seal then I doubt your engine be running at all. If there is a leak there expect it to be oil and just oil. Your cranking issue sounds to me like a heat soaked carb but then it could be several things. Ignition switch could be at fault as well as a dying battery. I will rule out the starter solenoid since its cranking. You could jump the starter and see if it cranks if it does is your ignition switch. I had a cranking issue with my car for a while now and it turned out to be my ignition switch. I replaced both switch and key cylinder and solved the problem.


1965 Mustang Resto-Modded with a classic charm
347 ci stroker 10:1 CR ( street warrior engine with a very mild custom ROLLER cam for torque) Weiand Stealth intake ported to AFR 185 cc ,CompCams GOLD 1.6 Roller rockers ,Wiseco ProSreet Forged Pistons,Manton custom pushrods, Hedman ceramic shorties
AOD stage 1( good up to 450 HP)
Rear End 3.80 gears, Monkey Grip Trac Lock posi unit
Tires 15" all around 225's in the back
JustAnotherRuki is offline  
post #5 of 8 (permalink) Old 4 Weeks Ago
PONY Member
07redstang's Avatar
Joined: Aug 2018
Location: Poteau
Posts: 277
As stated above the engine needs 3 things to start and run. Air (a given), fuel, and a well timed spark. You need to do some trouble shooting to see if your missing spark or fuel. First look into the carb after you cranked it a bit and operate the throttle and see if you have 2 jets of fuel spraying. If there is fuel then move to spark. Remove the #1 spark plug wire stick a screw driver in the end of the wire and hold the screw driver metal shaft near the engine block or exhaust manifold approximately 1/8 inch. Have an assistant crank the engine and see if there is a good blueish spark.

07redstang is offline  
post #6 of 8 (permalink) Old 4 Weeks Ago
SHELBY GT 350 Member
Classic Member
Ivy66GT's Avatar
Joined: Dec 2008
Location: Albuquerque
Posts: 7,934
Your profile is blank so we have no idea where you live. Death Valley, the north slope of Alaska on in the Himalayas will have different problems.

Sounds a lot like heat soak to me depending upon your definition of a 'few weeks'. A coolant leak will rarely cause a starting problem. An engine can start and run with zero coolant, it just won't live long afterwards.
Yadkin likes this.
Ivy66GT is offline  
post #7 of 8 (permalink) Old 4 Weeks Ago
GT Member
Driveway's Avatar
Joined: May 2013
Location: Panama City
Posts: 2,062
You do need to post some car info so we can talk specifics. I think you need to look at this as a heat expansion problem. Some item is breaking down after everything is nice and hot. And your troubleshooting needs to be done when it craps out, not hours later when it is cold.

It could be several things: ignition switch, coil, points, carb, or a wire.

And you could have multiple issues including those mentioned above that hide things.

1968, hardtop, 289, C4, seafoam green.
1966, hardtop, 289, original 3 speed, on the road and fun to drive.
1968, hardtop, 200, 3 speed, in work.
Driveway is offline  
post #8 of 8 (permalink) Old 3 Weeks Ago
glnn's Avatar
Joined: Mar 2019
Location: Chapmansboro
Posts: 4
My first bet would be the coil. Sure sounds like the coil is breaking down. Could be some of the other problems mentioned but I would first check the coil.
glnn 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