engine stumbling on acceleration
I just posted a message where I stated that the engine on my 1979 F-150 Lariat missfired.
To clarify, it actually is more of a stumbling at about 1700 rpm. The speed is irrelevant when this happens. Also, a tuneup was done - new spark plug wires, distributor cap etc.
Mechanics haven't been able to find the problem. Since it has 93,000 miles, I wonder if the fuel pumps are worn - since I believe there is one for each of the two tanks. However, since this happens regardless of which tank I am running on, it would really be a coincedence if both are giving out at the same time.
Thanks for any input.