hey guys.a c&l maf calibrated for 24 lbs is on the way.should be here monday.i also got a code reader and pulled some codes.they are 31 67 81 .i found out 31 is egr related,i deleted the egr.67 is clutch switch open?what is that?or manuel lever position sensor out.what is that?and last, 81,thermactor air diverter bad.what and where is that?any info would be great thanx again for the info on the maf.