^^^Yes, as a matter of fact I do
I've considered that as a possible cause for the tank grenading, but I'm still not convinced about it. There are no indications at all that the car is overheating; the damn tank just goes
Someone elsewhere suggested that I may have a small head gasket leak, and the combustion gases may be entering the cooling system, thereby pressurizing it??
Anyhow, the CEL issue continues. I replaced the fuel pressure regulator, mind you with great difficulty. Anything and everything that could have gone wrong happened while doing this job, and it took me 4-1/2hrs to do it. I then replaced to O2 sensor (3rd time). Still smokes out back, and instead of 1221 or 1222, the fault code is now 1264: O2 sensor heater element
Tomorrow I'll bench test the O2 sensor heater relay and recheck the wiring. If that doesn't work out, I'll just take out my trusty 20lb sledgehammer and go to town on this stupid car.