Hi, rpm 1800...have reduced it to 1400 by rotating the tps, very rich lots of soot....lots! Maybe1/2 mile to gallon.
obd codes:
21,27,28,29,31 and 71
Also ect/pwr light on
have replaced ho2s on offside exhaust as well as welding the joint, replaced aic,air filter all fluids correct levels.
Regards
Jeff