4L80E trans?
If so does the wiring harness connector underneath have signs of trans fluid on or in it? If yes, you'll need to drop the pan and replace the wire harness. I'd also replace both shift solenoids while your in there.
I'd bet it's either the pick up coil in the distributor or the ring stator in distributor is cracked and or loose. Replacing both requires removing the distributor. Fuel pressure for the 94-95 TBI is 26-32psi and the RV is on a GM P-30/32 chassis.
One other thing to check...
Cooling temp...
I own a Fleetwood Southwind Storm with a Chevy P30 chassis and 454 TBI w/4L80E trans. The previous owner elected to install 235/85R16 tires on it. The original size tires from factory were 7.50Rx16XPS 16in rims.
My issue is that I have at least twice (one before and one after) had the SES light...