Hello, I have a problem with a 1967 coupe , and I would like some possible solutions. I've been restoring it with my grandfather for three years now. What the problem is, is that after 25-30 minutes of running completely fine, the engine seems to suddenly almost die but not quite. It'll run really rough and I won't get any throttle response. Sometimes after a few minutes of running rough it will die. If I shut the engine off for a couple of minutes and restart it it'll run fine again. We've also had the issue of it suddenly quitting without any warning. That doesn't seem to follow any pattern though. Almost everything has been replaced in the engine bay. Its a new 302 engine, new carburetor, new 3 row radiator, and other stuff. The only things that haven't replaced is the alternator, power steering pump, and ignition system. The ignition system is a 26 year old mallory ( both the distributor and ignition coil). The vehicle did sit for 13 years in an Arizona garage (it developed a head gasket leak in our 289 which seized the engine and that why it was replaced). We did take it to a Mustang shop but they didn't tell us much regarding the problem because we asked them to help it pass emissions. They suggested we replace the primary jets on the carburetor (it is a edelbrock 1906 650 cfm) from .101 to .098. My guess now is that it might be the ignition system but I'm not sure. If anyone has some ideas, i would appreciate it very much.
PS: I am not currently with the car, so there is nothing I can quickly check. I would just like some ideas when I do go back to Arizona to fix it.
PS: I am not currently with the car, so there is nothing I can quickly check. I would just like some ideas when I do go back to Arizona to fix it.