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1969 Ford Mustang stalling problem

Tiny
ROCK CANDY RANCH
  • MEMBER
  • 1969 FORD MUSTANG
Engine Performance problem
1969 Ford Mustang V8 Automatic 57k miles

about 3 weeks ago our 69 mustang started stalling when we roll up to a stop. It just dies as though the key was turned off. No sputtering, or any indication it is going to do it. It does not do it every time, but it is very frequent. Engine temp does not seem to be connected with the problem and when the engine is running, it runs perfectly witout any indication of a problem.
The good news is the car starts (so far every time) by breathing on the key. No cranking or pumping the pedle what so ever. If I put the car in neutral when approaching a stop and give it a little throttle it seems to solve the problem, and it has never done it while driving at normal speeds. I am thinking I have an electrical problem, but have no idea where to start looking for the gremlin. RW
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Sunday, July 19th, 2009 AT 10:40 AM

4 Replies

Tiny
BUDDYCRAIGG
  • MECHANIC
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I'm more inclined to think that it's a problem with the carb.
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Sunday, July 19th, 2009 AT 9:02 PM
Tiny
ROCK CANDY RANCH
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Thanks for the reply.

I figured it was fuel related when it first started, but because the engine never acts starved for fuel, or gives me any trouble restarting I ruled it out.

It has a Holley (Street Dominator, I think) with pretty low hours.
What are you thinking could be wrong with the carb?

RW
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Monday, July 20th, 2009 AT 11:07 AM
Tiny
BUDDYCRAIGG
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I've got a 67 Pontiac with a carb on it.
I had to use a stronger return spring on the linkage.

If I slowly let off of the gas, it would take 20-90 seconds for the throttle to fully drop down to normal idle.

But if I let of of the pedal quickly, then it would go down to normal idle quickly, as it should.

Maybe play with a stronger spring, and turn the idle stop screw up a bit.
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Monday, July 20th, 2009 AT 11:23 AM
Tiny
ROCK CANDY RANCH
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Although I would feel pretty stupid, that would be great news if that's all it is....

I am far better suited to work on a carberator than anything that involves wire.

I'll let you know if it works.


https://www.2carpros.com/forum/automotive_pictures/384555_Picture_or_Video_986_1.jpg



RW
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Monday, July 20th, 2009 AT 2:59 PM

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