Driving uphill I have a stumble around 3000 RPM *. When the trans downshift because of the hills, the tach goes from 2k to 2800 or so, around 3000 the engine stumbles or cuts out briefly. If I back out of the throttle, I can keep it around 2800 or so.
I'm thinking spark. Coil, Cap and wires are new within the year. Dist Amp is old, maybe original. I tried putting a remote amp in last year, but was unsuccessful and had to revert to the original. I'm going to have to do some work to measure fuel pressure, voltage at the coil etc, to solve this.
* (Towing 1000 lbs, 4-5% upgrade going from 3000 to 6000 ft. I got passed by motor homes and schoolbusses)
I'm thinking spark. Coil, Cap and wires are new within the year. Dist Amp is old, maybe original. I tried putting a remote amp in last year, but was unsuccessful and had to revert to the original. I'm going to have to do some work to measure fuel pressure, voltage at the coil etc, to solve this.
* (Towing 1000 lbs, 4-5% upgrade going from 3000 to 6000 ft. I got passed by motor homes and schoolbusses)