Can economy get worse with Cat removal?

[sansui]

Gutted my cat and feel that my fuel economy has gotten worse instead of better. Is this possible? Running a SCT and the only mod it the Cat removal.

[Groundhawg]

Chances are probably not...most likely culprit is your right foot and the shot in the arm of fun that the SCT added.

I have found that I get the best mileage from my street tune, the tow and the economy tunes are probably a tie for second, then the more extreme tune is worst...mainly because it is just so hard not to lay into it.

Then too, swapping over to a straight pipe didn't help either, it sounds so good it's fun to let it talk now and again.

[fordfan30]

exactly as said

[BigGreen06]

Totally Agree
The lead in the right foot has lowered my economy from time to time, just because I love the whistle from the Turbo with the Cat and Muff gone; but when I actually drive responsibly (which is hard) I do see about 20 on the highway.

-BG06.

[Raul@Stealth Automotive]

+1 more.....

[burmad69]

I'm getting 16.5 with my 97 stock PCM (for now) and 4.10 gears at 60 MPH if I push it more it goes to about 12, thinking about 3.55 or 3.73 gear change but the 4.10 work great for big heavy towing if your not in a hurry.

[Strõkër~X]

Originally Posted by sansui

Gutted my cat and feel that my fuel economy has gotten worse instead of better. Is this possible? Running a SCT and the only mod it the Cat removal.

you are really cheating yourself when "gutting" your cat, unless your in a state that does require you have them. get the 4' turbo back exhaust with no muff or kitty and your truck will come alive!

[uncertain]

How much of a differance does the 4" make, over just deleting the cat, and muffler on the stock 3.5"

[roadrunner]

it will make your wallet lighter

[smokersteve]

ya my eco got worse cuz I like the sound when I gun it