I have a '75 280, stock in every way. While driving it today in 80-ish temperatures, and decelerating off the interstate after a 10-mile trip, it suddenly lost power, missed a bit, then surged, then did the same thing again, and again, and again. ... no power, then miss, then surge. I limped home in this fashion (about 1 mile). I would appreciate any diagnostic help you can provide. I've just started driving the car again after parking it for winter in the garage, but it has run fine for the 100 or so miles I've put on it in the last week. I have had the car for about one year, and know little about its past. I have not changed with fuel filter (it has, according to the odometer, about 127,000). Thanks for your help.

could be the fuel pump. could be clogged lines. Change the filter and perhaps open it up and see what's inside (rust?)

Once you establish your fuel pressure rates using an inexpensive inline liquid-filled $15 Summit gauge (installed past the fuel filter), and your symptoms persist:

- check your fuel pressure regulator

- get rid of the fuel dampener (that was the problem on my 76)

Download your car's Factory Service Manual from here:

http://www.xenons30.com/reference.html

There are trobleshooting pages dedicated to the fuel starvation.

Regards!

I would suggest draining the fuel tank and replacing the fuel filter.