Hi all,
Trying to sort out some problems on a 1996 QP 2.8. We get "Air/Fuel Ratio" code - flashes 1-4. Initially we found that both water temp sensors where far out of spec (6K and 15K) and changed those. That didn't cure anything other than better exhaust gasses... Then we found that the left cam sensor lost contact when warm - so we changed that. No cure here either... The air temp and MAP sensors have been tested and found ok.
The engine runs strong until it is at working temp - then the engine lights come on and it will start to misfire slightly - and with noticeable reduced power. A quick on/off with ingnition switch clears it up - but just for a few minutes.
After all these repairs we still get same fault code. As I understand it it's the water-/air- and MAP sensors that can throw this 1-4 code. All other sensors,the lambda/cam/crank/TPS,have separate codes.
Are we missing something ? I know the air conveyor - 571060300 - is a bit loose and the screws have been over tightened and punched holes in the throttle valve body. Can that be the issue ?
Would be very happy for any tips and advise.
Thanks - Arvid
Trying to sort out some problems on a 1996 QP 2.8. We get "Air/Fuel Ratio" code - flashes 1-4. Initially we found that both water temp sensors where far out of spec (6K and 15K) and changed those. That didn't cure anything other than better exhaust gasses... Then we found that the left cam sensor lost contact when warm - so we changed that. No cure here either... The air temp and MAP sensors have been tested and found ok.
The engine runs strong until it is at working temp - then the engine lights come on and it will start to misfire slightly - and with noticeable reduced power. A quick on/off with ingnition switch clears it up - but just for a few minutes.
After all these repairs we still get same fault code. As I understand it it's the water-/air- and MAP sensors that can throw this 1-4 code. All other sensors,the lambda/cam/crank/TPS,have separate codes.
Are we missing something ? I know the air conveyor - 571060300 - is a bit loose and the screws have been over tightened and punched holes in the throttle valve body. Can that be the issue ?
Would be very happy for any tips and advise.
Thanks - Arvid