Archametes
15+ Year Contributor
- 45
- 0
- Apr 13, 2008
-
Hyde Park,
New York
My code scanner said:
1. Catalyst efficiency below threshold (bank 1) and
2. Auxilary emmissions control malfunction.
For the 1st is it the o2 sensor or the catalytic converter? (Cat is hollowed and haven't had an issue in almost a year since doing it.)
For the second would that be the EGR valve or is it something else? How can I diagnose the problem further?
I wanna fix the problem but don't know what the exact problem is.
The CEL light came on at about 2100 rpm while letting of the gas from a rising hill and cruising at 49 MPH according to the freeze frame, the longterm fuel trim was around +3.0 and the shortterm fuel trim was -1.6...
Allso if I stomp the gas to accelarate it goes way lean according to the flashy A/F guage. I KNOW I NEED A WIDEBAND But i wanna fix this before shelling another $350 bucks on something else. It stills pulls decently enough for a AT but could be better... If the helps at all....
As far as the shifting problem goes...
It'll downshift from overdrive to 3rd at odd times like just cruising at a steady 50 MPH, and stay in 3rd long after it should have shifted up to overdrive (example: doing 3500rpm in third going downhill instead if it upshifting like it's supposed to). It'll also downshift and make a clunky noise when stopping. The shift/clunk will occur at around 10 mph when slowing down.
Thanks for the help , Mike
1. Catalyst efficiency below threshold (bank 1) and
2. Auxilary emmissions control malfunction.
For the 1st is it the o2 sensor or the catalytic converter? (Cat is hollowed and haven't had an issue in almost a year since doing it.)
For the second would that be the EGR valve or is it something else? How can I diagnose the problem further?
I wanna fix the problem but don't know what the exact problem is.
The CEL light came on at about 2100 rpm while letting of the gas from a rising hill and cruising at 49 MPH according to the freeze frame, the longterm fuel trim was around +3.0 and the shortterm fuel trim was -1.6...
Allso if I stomp the gas to accelarate it goes way lean according to the flashy A/F guage. I KNOW I NEED A WIDEBAND But i wanna fix this before shelling another $350 bucks on something else. It stills pulls decently enough for a AT but could be better... If the helps at all....
As far as the shifting problem goes...
It'll downshift from overdrive to 3rd at odd times like just cruising at a steady 50 MPH, and stay in 3rd long after it should have shifted up to overdrive (example: doing 3500rpm in third going downhill instead if it upshifting like it's supposed to). It'll also downshift and make a clunky noise when stopping. The shift/clunk will occur at around 10 mph when slowing down.
Thanks for the help , Mike
