mvvette97

iTrader: (18)

Not sure why but after I installed a set of new jet hot coated pacesetters the car seems to tun smooth and then rough. I hooked the scanner up and it's jumping from closed loop to open loop now. It will jump back and forth every 5 seconds or so. Any idea why?

96blackta

iTrader: (7)

Sounds like your 02s are toast. Are the headers coated?

mvvette97

iTrader: (18)

yes they are. They are pacesetters with the JetHot coating

96blackta

iTrader: (7)

I think you might have to replace those 02s then. Coated headers are known to kill your 02s when you first run the car after installing them.

96blackta

iTrader: (7)

I should also ask if you spliced the 02 extensions or bought the plugs?

mvvette97

iTrader: (18)

well I have an extension on one side but the other is spliced. The thing is it was spliced before I had the headers on and it was fine. This all happened after the new headers. when I first got the car it would do that but then I found out that the wires for the heaters for the O2s were cut so after I ran new heater "power" wires it ran great. I just went out and checked to see if it is still getting power to the heaters and they are fine. So nothing has changed other than putting the headers on. I wonder if I damaged them swapping them from the manifolds to the headers or did the header coating do this?

Puck

iTrader: (17)

The coating has been known to foul out O2s after the first couple of heat cycles on new headers. That is why it is recommended to change them after a week or so of running them and not to install new ones with the new headers.

Replace the O2s and you should be good to go.

mvvette97

iTrader: (18)

ok looks like that's what I will be doing, thanks

Z28_LT1

iTrader: (2)

never heard of this...why does the coating kill them?