Bad 02 sensors questions............
Got traction?
Thread Starter
Join Date: Jan 2001
Posts: 2,145
Likes: 0
Received 0 Likes
on
0 Posts
Bad 02 sensors questions............
I put LT's on the car and the passenger primary 02 sensor is about half way in(it's stripped) when I tried to put the sensor in. Well went to the track and my mph was alteast 2 mph lower than what it was with shorties. My friend had a autotap and plugged it in. It read "primary 02 sensor bank(1 or 2) can't remember and 02 sensor secondary banks 1 and 2. Now I know that the rears will always say that cause I don't have any cats. But I think my passenger side primary is bad or going bad.
Would this sensor cause the EEC to retard the timing and make it run rich? I made sure that the car was in close loop before racing. When I spoke to another guys there he said that once he put LT on his car it made it run rich. So I figured what the hec and I'll lean it out a bit. Well I did pick the mph. I haven't been on the dyno yet but I'm gonna try to fix this first. Any advise would be appreciated. Thanks. -Mark
Would this sensor cause the EEC to retard the timing and make it run rich? I made sure that the car was in close loop before racing. When I spoke to another guys there he said that once he put LT on his car it made it run rich. So I figured what the hec and I'll lean it out a bit. Well I did pick the mph. I haven't been on the dyno yet but I'm gonna try to fix this first. Any advise would be appreciated. Thanks. -Mark
__________________
98' cobra
98' cobra
Guest
Posts: n/a
The A/F will tell the complete story. Ford contol units will always add more fuel when a o2 goes on the blink to make sure there is not a lean condition, my Crown Vic. did it.
I do not know about retarding the timing too. Make sure none of the wires going into the o2 sensor are rubbing on anything or are freyed which would cause the sensor to ground out.
BTW how was the turnout for your MMTB track day ?
I do not know about retarding the timing too. Make sure none of the wires going into the o2 sensor are rubbing on anything or are freyed which would cause the sensor to ground out.
BTW how was the turnout for your MMTB track day ?
whoopdy fucking do!
Join Date: Jun 2001
Posts: 2,852
Likes: 0
Received 0 Likes
on
0 Posts
well, it can throw your oxygen reading off.... any mod can.. you should get ew 02's and a new tune/chip.....
if the A/F is way off it should be throwing a check engine light......
if the A/F is way off it should be throwing a check engine light......
__________________
200 points away from a 300
200 points away from a 300
Guest
Posts: n/a
AT WOT the O2 sensors are not used. The fuel mixture is based upon two things one is MAF count and the other is LTFT. If the O2 wasn't getting a good reading the car will throw a code quickly. You will get a code of Lean bank #1 or #2 depending on the affected area. Your best bet is to tune it on the dyno but if you had a logger you could see how much correction is taking place by the ECU. You may see the LTFT's are -10% or even possibly +10% trying to compensate for a tuning problem.
Got traction?
Thread Starter
Join Date: Jan 2001
Posts: 2,145
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by "FordMan"
The A/F will tell the complete story. Ford contol units will always add more fuel when a o2 goes on the blink to make sure there is not a lean condition, my Crown Vic. did it.
I do not know about retarding the timing too. Make sure none of the wires going into the o2 sensor are rubbing on anything or are freyed which would cause the sensor to ground out.
BTW how was the turnout for your MMTB track day ?
The A/F will tell the complete story. Ford contol units will always add more fuel when a o2 goes on the blink to make sure there is not a lean condition, my Crown Vic. did it.
I do not know about retarding the timing too. Make sure none of the wires going into the o2 sensor are rubbing on anything or are freyed which would cause the sensor to ground out.
BTW how was the turnout for your MMTB track day ?
Anyone got any spare o2 sensors laying around?
Jeff- Thanks. Looks like I need another tune. I guess this time I might bite the bullet and get a chip. -Mark
__________________
98' cobra
98' cobra
