On my way home from work today, my CEL came on and I did not notice any difference in the ride. Volt meter, oil pressure, and coolant temp just fine so I continued my drive home. 21--O2 sensor; 41--TPS.

I currently have a coolant leak into the #4 cylinder--it runs rough if left to leak for more than 2 days. I am planning to do a HG and head replacement this weekend. Could this be the culprit? Yesterday, I started the preparations for the HG work by PB blasting some of my intake & exhaust bolts. I did not spray near the O2 or TPS though.

Any ideas? Think it's OK to run the rest of the week?

 

Leak may cause the o2 to screw up, but prob not TPS since it's on the t-body. However, the o2 could be throwing crazy signals to the TPS causing it to throw codes. I'm guessing is all. I doubt if it'll hurt too bad to drive for a few more days. May be pretty rough though.

 

Yeah, I think what I'll probably do is test the TPS when I take it off for the HG work. As for the O2 sensor, I've PB'd that thing for days and days and the bolts aren't budging. I think I'll have to file the sides of the bolts down.