I began to think I had this issue figured out, but…..
We just completed a 4200 mile trip in our 350 LE.
On the final leg of the journey, we had a few issues.
Upon letting off the throttle for a downhill, the engine would not regain full power upon reapplication of the throttle. It would starve for fuel. I could move the accelerator pedal up and down, and finally it would regain full power. The engine would make partial power during these episodes and when power came back it was full and strong, for as long as I held the throttle.
This occurred randomly throughout the final 1000 miles of the trip.
I also had several random flashes of the water in fuel light throughout these episodes, and during previous parts of the trip.
Earlier in the trip, I noticed an OBD connector mounted on the righthand side of the steering column. I have completed a little research and determined there should be Onboard Diagnostics(series 1) on this model chassis.
I hoped Airsteam perhaps connected Check Engine light to the Water In Fuel lamp, and perhaps the flashes I was seeing were in fact trouble codes.
But, tonight upon shorting what I believe to be the correct pins together on the OBD connector, I got no response from the WIF light.
Has any read OBD codes on the early 90s MHs?
Jeff & Cindy
'09 27FB Flying Cloud
'91 350 LE MH