This has been occuring for the last couple fill-ups, but ive been getting HORRIBLE mileage, and the car stays in open loop (o2 voltage not cycling) even while cruising.

Bad o2 sensor? map sensor on the fritz? ideas?

95 Avenger
ATX->MTX Swap
Holset HX40 @ 26 psi

Hey I just had sorta the same thing. Mine was the opposite though. It was always in closed loop. It even cycled at WOT. I used $13 in gas just driving less than 2 hrs. and the car ran like complete crap. Anyways I replaced the 02 sensor and now it runs perfect. Mine was covered in black soot and having 73K original miles on it didn't help I guess :/

which O2 sensor did you replace? Just the one in your downpipe?

Wondering if it is ever necessary to replace the one in my catback?

97 RS(PTE SC-61, Built Long Block, Electromotive Tec 3)It's Here!

I have noticed the same of my car, how it has been in open loop for a while, and then goes back to normal. I don't remember the site i saw this little trick at but i was thinking it may be worth a shot if it stops the o2 sensor from sending any negitive signal back to the computer, and that was using the 1/4 watt 1megaohm resistor and putting it inline with the sending wire on your sensor.

Have you noticed a spudder out of your car at WOT, or even just off the line at a slow pace? Mine has been doing that for a couple hundred miles or so .

-Danny


" We cannot appeal to the conscience of the world when our own conscience is asleep. " Carl von Ossiet

no studder, car drives fine at WOT. only driveabilty probs are sluggishness sometimes as its driving in open loop during normal driving (too much fuel) and it died today when i left the car on idling to warmup before i left for work. other than that and the horrible gas mileage, its fine :/

95 Avenger
ATX->MTX Swap
Holset HX40 @ 26 psi

Mine ran ok at WOT also. But it'd die at stop lights and have hardly any throttle response. I had to rev the crap out of it just to take off in first. And when I did take off I smothered everyone behind me in black smoke.

somehting new, dont know if this is even related tho?
http://www.2gnt.com/dcforum/DCForumID16/4049.html

95 Avenger
ATX->MTX Swap
Holset HX40 @ 26 psi