Originally posted by sugazzi:
Iâ??ll be cruisinâ?? about 70 minding my own business, when all of a sudden the top speed just gets lower and lower until I get to around 45 mph and itâ??s like something resets and I can get back up to 70 for a while.



Codes, codes, codes!
There should be something there.

This sounds like bad wiring to the MAF, a corroded MAF connector, or a bad MAF.

A CAT would not do this.

Also monitor your fuel pressure. Clogged filters can act this way.

"Those who cannot remember the past are condemned to repeat it" -George Santayana