I have an off road vehicle that was brought to me to find and cure a problem, It has a 2006 HHR 2.4L and DBW, it has a problem where it will loose the throttle control, the pedal position moves on the scanner but the throttle butterfly will not, I did get it to happen twice for me. it does not get any codes, but someone may have turned off the ones that it might set to indicate the problem? where would I see the correlation or prediction or ??? that is needed to make this not happen, it has an aftermarket air filter assembly and the MAF is in a tube, so I think the predicted to actual or correlation or??? may need some tweaking? anyone worked with this type of problem?