My friend have a '79 CJ7 with a 304, Edelbrock 4 barrel. The engine starts and runs well. The problem comes at 3000 RPM. When cruising down the road or sitting in the driveway the Jeep will accelerate fine up to 3000 and flattens out like it has a governer. With some feathering of the throttle you can go past this dead spot up to 4500
+. When we got the Jeep it had this problem. The previous owner had an electric fuel pump in series with the mechanical one (two pumps). The 4 barrel linkage was missing and some cobbled up copper wire was in its place. The 4 barrel appears to be fairly new and we got the right linkage from Edelbrock. The four barrel kicks in and the carb appears to be working like it should. We removed the two existing pumps and installed one electric pump sized for the carb specs (5 psi max). we removed the tank and clean it. Replace all fuel and vent lines with new. It doesn't seem to be starving for fuel. The distributer seems fine as far as play. It's set at about 10 degrees. The vacuum advanced seems to work and the diaphram is leak free. Additionally, we replace the Motocraft ignition module (it look a little fried). The next move is to replace the coil (he's already bought one) and distibuter (probably try the pick up first). The coil is a MSD unit and also appears new. I am not a big supporter of replacing stuff to see what happens but I don't know what else to try.- posted
20 years ago