first ever CEL on my 97' 5spd...ideas??
06-30-09, 10:03 PM
#1
first ever CEL on my 97' 5spd...ideas??
i just installed new headers and new rear tires...its feeling smooth as a whistle and sounds better than an 19 yr. old girl..any ideas??
my guess!! O2 sensors...MAF...idk..help! please. and thanks guys. ill be checking it tomorrow when she's cooled down and i have some day light.
my guess!! O2 sensors...MAF...idk..help! please. and thanks guys. ill be checking it tomorrow when she's cooled down and i have some day light.
06-30-09, 11:20 PM
#4
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im going to go with o2 sensor need one of those things to pull it further out of the exhaust since you dont have a cat anymore... youll be fine.... my motor spun a bearing and my check engine light never came on 
07-01-09, 12:54 AM
#5
what do you mean "to pull it further out of the exhaust"??? that part confused me..ill be back online in Central morning hours. bye and thanks again for the insight.
07-01-09, 02:23 PM
#7
It's most likely a missing cat from when you put your new header on the car. Go to Autozone and get the code from them just to be sure. If so, don't worry about it, keep on driving it like you would it won't effect performance, only emissions.
To reset the ECU, unplug the neg. battery cable and let the car sit for about an hour (discharges capacitors in ECU). Hook it back up and start the car. CEL should be off, but this is not a gaurentee. Let the car idle for about 10 mins it might sound a little rough and maybe lower than usual. This is normal during a reset. During that 10 mins the idle will climb back to normal (about 700 rpm). After that, turn off the car and go unplug the neg. batt cable one more time, this time for only 30 secs. After that, plug it up, drive around for a bit, and you're done. Don't need a professional for that, but if the CEL is still on again it won't affect performance.
To reset the ECU, unplug the neg. battery cable and let the car sit for about an hour (discharges capacitors in ECU). Hook it back up and start the car. CEL should be off, but this is not a gaurentee. Let the car idle for about 10 mins it might sound a little rough and maybe lower than usual. This is normal during a reset. During that 10 mins the idle will climb back to normal (about 700 rpm). After that, turn off the car and go unplug the neg. batt cable one more time, this time for only 30 secs. After that, plug it up, drive around for a bit, and you're done. Don't need a professional for that, but if the CEL is still on again it won't affect performance.
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07-01-09, 02:31 PM
#8
update! it was code p0420...i think. and it was the emissions threashold in bank 1. no other codes came up just the emissions one so im good there..tomorrow we're gonna see if we can reset the ecu to run with that amount of airflow. if not then im gonna consider taking out the bulb because it is annoying, and i keep my car in routine maitenance so i trust it. damn O2 sensors.
07-01-09, 02:33 PM
#9
It's most likely a missing cat from when you put your new header on the car. Go to Autozone and get the code from them just to be sure. If so, don't worry about it, keep on driving it like you would it won't effect performance, only emissions.
To reset the ECU, unplug the neg. battery cable and let the car sit for about an hour (discharges capacitors in ECU). Hook it back up and start the car. CEL should be off, but this is not a gaurentee. Let the car idle for about 10 mins it might sound a little rough and maybe lower than usual. This is normal during a reset. During that 10 mins the idle will climb back to normal (about 700 rpm). After that, turn off the car and go unplug the neg. batt cable one more time, this time for only 30 secs. After that, plug it up, drive around for a bit, and you're done. Don't need a professional for that, but if the CEL is still on again it won't affect performance.
To reset the ECU, unplug the neg. battery cable and let the car sit for about an hour (discharges capacitors in ECU). Hook it back up and start the car. CEL should be off, but this is not a gaurentee. Let the car idle for about 10 mins it might sound a little rough and maybe lower than usual. This is normal during a reset. During that 10 mins the idle will climb back to normal (about 700 rpm). After that, turn off the car and go unplug the neg. batt cable one more time, this time for only 30 secs. After that, plug it up, drive around for a bit, and you're done. Don't need a professional for that, but if the CEL is still on again it won't affect performance.
07-01-09, 05:51 PM
#12
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itll probably come back on after the monitors are set. but thats cause you dont have one of the cats there. you still have the cat on the bottom pipe right?
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