piper62j
Well-known member
- Joined
- Jul 6, 2014
- Messages
- 379
- Reaction score
- 39
- Location
- 34613
- My Car
- 1973 Q-Code Mach 1. Full restoration in progress.
First things first.. Before you spend any more time and money swapping and theorizing.. Perform a compression test. If all the cylinders are within 25% of max psi, then the engine is in great shape. Not knowing the history of the work that has been done on this engine. From there, you will know if it's valves or rings.. If all checks out good, then move on to the ignition system.. Lastly, if the above items are spot on,, inspect the carburetor for wear at the throttle shaft where it runs thru the base.. The base wears on the return spring side causing a vacuum leak, which can create all kinds of performance problems.
Keep us up to date on your progress..Good luck.
Keep us up to date on your progress..Good luck.