I have a 86 190e 2.3. I replaced the coil, fuel pump, filter, relay and pressure regulator. I was having problems with the car loosing power and stalling. After replacing all of the above parts it ran fine for about 75-100 miles. The next day I get about 6-7 miles and it acts like it looses power on a cylinder or two......then a few miles down the road it is back to normal. I took the fuel pump relay out and hot wired the pump.....it would do the same thing off and on. But if i pulled the jumper wire and plugged it back in it would do fine for a few miles and then the same old story. Are there any relays etc...that are problems on this model. Any help with this would be appreciated......

Thanks