Hey all!
So I just purchased a 2000 Protege and it has a peculiar issue.
When you start it up cold, she runs fantastic for about 8-10 minutes.Once it has been under load for about that time, it starts to misfire, rough idle, and has almost no power to accelerate. You can not even get going past 65 on the interstate full power.
My thoughts right now are that it is very possibly the o2 sensor. I have been running some logging on the obd2 port and the o2 sensor a flat line at about .1v when idling with random spikes up to .7-9, when driving, it will peg a line right at .9 and ocassionally will start running better and start doing what it should do, bouncing around between .6-7. The fuel trim is off as well, which just points more towards some issue there with the o2 IMO.
The previous owner replaced the coil packs, plug wires, spark plugs, tons of vacuum lines, and some other little stuff but said "I took the o2 sensor out and it looked fine (Obvious not an expert). I think it's pretty possible based on how the sensor looks it may not even be the right one.
Any ideas?
So I just purchased a 2000 Protege and it has a peculiar issue.
When you start it up cold, she runs fantastic for about 8-10 minutes.Once it has been under load for about that time, it starts to misfire, rough idle, and has almost no power to accelerate. You can not even get going past 65 on the interstate full power.
My thoughts right now are that it is very possibly the o2 sensor. I have been running some logging on the obd2 port and the o2 sensor a flat line at about .1v when idling with random spikes up to .7-9, when driving, it will peg a line right at .9 and ocassionally will start running better and start doing what it should do, bouncing around between .6-7. The fuel trim is off as well, which just points more towards some issue there with the o2 IMO.
The previous owner replaced the coil packs, plug wires, spark plugs, tons of vacuum lines, and some other little stuff but said "I took the o2 sensor out and it looked fine (Obvious not an expert). I think it's pretty possible based on how the sensor looks it may not even be the right one.
Any ideas?