1966 Mustang engine sputter - Ford Mustang Forum
LinkBack Thread Tools
post #1 of 4 (permalink) Old 02-14-2012 Thread Starter
Gumbey75's Avatar
Joined: Dec 2011
Location: Oakley
Posts: 20
1966 Mustang engine sputter

Just recently replaced my 200 motor because the bottom end blew. It has been running good for the past two weeks till today drive back from getting gas.(the fuel pump was replaced this morning cause it was leaking if that matters)

While driving out of nowhere it sputtered and die continuously. Pulled over and put the car in park and restarted it and it idled fine. Put it in drive and get back on the road and 10-15 seconds later it does it again... Then stops and was fine till i got to work(which was about a mile)This is the first time this has happened and I am stumped.

Parked it at work and checked the carburetor, its getting gas once with butterfly open. Choke open as hot. Getting spark from all cylinders(Took out each spark plug to make sure it would stumble)

I do have glass inline filter going to the filter of the carburetor and did see there was a small amount of brown mud like built up on the bottom so I took it out and cleaned it off with compressed air.

The only thing I can think of is the brown stuff got inside the carb and stalled it out or maybe "Bad" gas????

There are no vacuum leaks all new hoses,points, condenser, cap, rotor, plugs, spark plugs.
Gumbey75 is offline  
Sponsored Links
post #2 of 4 (permalink) Old 02-14-2012
BOSS Member
Yadkin's Avatar
Joined: Apr 2011
Location: Yadkin Valley
Posts: 4,827
On my old cars I'd rebuild the carbs every third oil change. The kits are cheap and proper adjustment is as essential part of a tune-up, in my opinion. Its also economical because a clean carb will net you better fuel economy.

When you mentioned the fuel pump going I immediately thought gunk from that clogged your fuel filter or got through it and into the carb. Re-build the carb and get a new filter.

2005 4.0 MT dual exhaust GT mufflers GT suspension and wheels
Yadkin is offline  
post #3 of 4 (permalink) Old 02-14-2012
BOSS Member
Classic Member
rex1965's Avatar
Joined: Jan 2010
Location: Pittsburg
Posts: 3,954
That is probably from rust in the tank, it is not uncommon to introduce particles into the fuel system when changing a fuel component (fuel pump in this case), if you have very much rust in the tank the sock may be plugged. And that stuff may have gotten into the carb, also. Some fuel filters have a spring inside to push the filter away from its seat if it becomes plugged, I'm not sure if the clear ones are that way. I would do a fuel pump capacity test, disconnect the fuel line from the carb, put a piece of flexible fuel line on the end of the line and put the other end into a quart metal can, ground the coil hv wire to the block so you don't get a spark, and the motor won't start, then crank the engine for 20 seconds, you should have at least a pint of gas in the can, also look at the color of it, rusty, water, etc. Good Luck.
rex1965 is offline  
post #4 of 4 (permalink) Old 02-15-2012 Thread Starter
Gumbey75's Avatar
Joined: Dec 2011
Location: Oakley
Posts: 20
Cleaned out the filter and swapped the coil since that was the only thing I didn't replace when replacing motor. And has been running like normal again. Well see!
Gumbey75 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:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

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