BigPete:

If you find a fault with the ignition module, your best bet might be to get it rebuilt (about $975). I had to replace my module, but I got very lucky and found someone who had a used one and did not know what they had.

Regarding the vent tube, I replaced mine while doing the head gasket because it was in bad shape and had been "repaired" before. I was not having any problems.

If you get discouraged and really want to get rid of your CE, let me know please.

Cary

90 300CE
92 300TE 4Matic
76 Jag XJ12C
49 MGTC