woodstowater
New member
Hey all, looking for a little advice.
I have a 4.3 MPI that is having an RPM issue. At any speed, or RPM, it bounces plus and minus about 200 RPM every few seconds. Engine load doesn't seem to play into it much, as it does the same thing running on the hose in neutral on the trailer. Seems like a fuel issue would be the primary cause, but i'm not sure. I have changed out the filters, done fresh gas and injector cleaner and have had no change. Throttle response is fine as well, which is leading me to think maybe its something electronic. I know MPIs can have issues with hunting.
I have a 4.3 MPI that is having an RPM issue. At any speed, or RPM, it bounces plus and minus about 200 RPM every few seconds. Engine load doesn't seem to play into it much, as it does the same thing running on the hose in neutral on the trailer. Seems like a fuel issue would be the primary cause, but i'm not sure. I have changed out the filters, done fresh gas and injector cleaner and have had no change. Throttle response is fine as well, which is leading me to think maybe its something electronic. I know MPIs can have issues with hunting.
