Contour Enthusiasts Group Archives Forums Modifications Duratec Maintenance Bad precats.......

Hey guys..... I got a 420 code (bad precat, bank 2) a while back (like months ago). I just have not had the money or the time to change/gutt the precats....basically i work about 50-60 hours a week.

If you guys had to guess or estimate, how much of a power loss and fuel economy loss am i getting.....its been since about march of this year.....i know its bad.....but im on a tight buget and time frame.



Lupe

According to my CEL codes, both my right side and left side precats have been bad for the last 30,000 miles, and so far, I haven't seen any difference in drivability, power, or mileage. I'm still consistently averaging 30 mpg. The dealer's service department even agreed that spending the $3500 or so to replace the cats wouldn't make the car run any differently than it does now. We don't have emissions testing in Kansas, so that isn't an issue.

I picked up 3-4 mpg when I swapped out my bad precat (bank1) with a new one. This was done at 100,000 miles.

I could not perceive a marked power increase, but the car did get quieter and seemed to rev a bit quicker.

i'm thinking gut the pre-cats. Maybe stick a straight pipe in the center.