Engine hesitates after towing old trailer
I barrowed an old trailer today, and after driving with it I noticed hesitation from the engine. later the engine just stopped (on the freeway!). It seed that there something wrong with fuel supply. I managed to get home by holding minimum 1500 rpm and using accelerator/brake pedal actively.
This same thing happened a while ago the last time I barrowed the. same trailer. However, this time the problem continued after I disconnected the trailer.
I tried to disconnect battery terminal for an hour in order to reset the computer, but I noticed little improvement.
What caused this, and how to I fix this isssue?
1996 4.0 Country, K/N, MSD ignition, Dynomax VT, 63mm TB