thats how my front o2 fits. i have heard that the manifold has room to move, the bolt wholes are WIDE. i already need a new o2 front sensor (100+) but i wanna see pics, or shoukd i just move it to the collector...

thanks..

 

how long after the HS's did the front sensor last? I'm debating on moving mine too.

 

check engine light came right on....

 

Hmm mine came on after I just put em on but it was for the sensor in the b pipe...not that o2.

 

I am planning on putting the 02 in the collector. I will get a bung or something to plug the hole upstream, extend for the new, lower position. Hopefully it will keep the car running more ... normal. I want the 02 getting information off of all 3 cylinders on the bank, not just one.

I would run the current o2s for a few hundred miles, then put in new ones. I think the HS are coated, and this coating can sometimes screw with 02s when it is in the burn-in phase.

 

Interesting, I don't think mine fits that tight. Yes it is close but no where near cramping up like that. I'll try to get some pics ASAP.

 

im going to loosen the bolts on the manifold this weekend and see if i cant fix the problem. please post up some pics, i wanna see how much room i got.

thanks

 

Move it to the collector.

 

please post the pics, or anyone else with a 5.5 with HS headers..thanks!

 

I just put mine on Saturday. By Tuesday CEL came on... I saw your thread and i looked... Mine looks just like that!!

I used an O2-sim for my other 2 sensors in my front manifold... i was thinking about just buying another sim for this one and plugging the hole... Will that work. I got a quote of $100 to move it and weld in the new bung.
Its only $30 for an O2-sim... Will it work??

 

No it will not, you can't sim one of the primary o2 sensors since they help determine your fuel maps.