A couple of years ago, right after a head gasket replacement, I had an intermittent hard start. I took it back to the shop and he read some codes and suggested I drive it a bit more to confirm symptoms. He probably knew at that point what the problem was but didn't have the heart to tell me right after just doing a head gasket and water pump on the car. By accident I discovered that the EHA was not plugged in. I plugged it back in and the car was back to normal.

Could you over the diagnostic again?

Thanks,

glenmore
1991 300CE
2000 C280
1990 LS400