whts wupn

First post here. Thought I'd look around for a place to share ideas and solutions to Mustang problems. I have two (new to me, been in the family for 25 years) Mustangs. They are both 1970's One is a Mach 1 Red on black with a 351 CJ from a 1972 Mach 1 and the other is a convertible white with black top and also has the original 351 C in it. The cars are in great (not show but close) condition. I do have an issue with the Mach 1 right now and probably need to be directed to the right area in the forum for engine troubleshooting. Seems the Mach will idle and rev nicely all day long, as long as you don't drive her too far.I get a couple miles down the road and she dies on me and won't get going again until she's cool.I have replaced the carb with a new Holley and replaced the fuel filter and coil. The ignition will be next but I still can't figure out why at rest the engine will run great but under a load she quits. Any ideas?

TPony

I have no clues, we do have a great classic section where folks will be glad to help. Post some pics whenever you can. Welcome.

1HottMach

Sounds like timing to me... check your distributor bolt to see if it's loose.. Maybe she drifted on you?

PennState

try the classic sec.

ptkthekid

Sounds like a temp problem. what kind of temp gauge do you have?

ptkthekid

^ maybe you need a new waterpump. Once I had similar problems. the waterpump seemed fine but, when I took it off all the "pitched" parts of the blades were worn off. it sounded good but it wasn't pushing any water.