I have a 1988 190E 2.3 that loses power and almost dies, especially when climbing a hill. It has to be pulled to the side of the road to work the accelerator for awhile before rpms can be built enough to proceed (limp?) down the road until the next episode.

Last year, it was having problems running and starting and pretty much shut down during a trip until a mechanic bypassed the oxygen sensor (put in a bypass switch) and this helped for a few months. Now, it is again running as badly as ever. It does runs much better, but somewhat rough, when the computer is completely disconnected.

I am thinking of buying a computer and oxygen sensor, but not sure that if that would fix the problem or not.

Any ideas? Thanks!