1997 E300D PROBLAMATIC

[rodm]

In mid january I changed my engine tensioner shock which was bad. Nothing else was wrong with the car at that time. The following day after a 15 mile drive home the vehicle started surging wouldnt go above 30 mph and threw a bunch of codes. A check revealed the transmission bushing was leaking badly evident from a large puddle on the ground. The SOV was also now leaking evident from another large puddle on the ground. The following day I tried to start it and it would not start, more fuel now caught in a pan below SOV while cranking. I have now changed the bushing and replaced the SOV as a new oring did not help. All fuel lines were changed to Viton solid black fuel injection hoses and all orings changed to viton kit, from FRYERPOWER. All codes were cleared as the engine was started without the manifolds on. The car seemed fine no codes after a 10 mile drive. On its first day back in service after 20 mile drive the CEL goes on with ENGINE ELECTRONICS LIGHT and it goes into limp mode. Drove it to autozone today CEL and ELECTRONICS light on BUT its not in limp mode. Engine is surging at around 1700-1900 rpm. Autozone gets 1 code which is PO715 speed sensor circuit but, would not clear the code. Should I replace the conductor plate ? or pay to get the transmission codes read ? or get someone with OBD to clear CEL? I started several other posts during my adventure of these repairs.

THANKS rodm