need fast answer bad gas milage cause by first cat unpluged

[95 super subbie]

almost a year ago i put a clutch in my car, now iam in the process taking a the tranny out without having a tranny to put back in it when i dropped the whole exhaust in one piece the on the first cat the o2 senser was unplugged would this cause a decrease in gas mileage! help

[WAWalker]

Would have cause a check engine light. Was your CEL on all the time. Yes, it would affect gas milage, but not a lot.

[95 super subbie]

Would have cause a check engine light. Was your CEL on all the time. Yes, it would affect gas milage, but not a lot.

 

no check engine light was never on

[nipper]

almost a year ago i put a clutch in my car, now iam in the process taking a the tranny out without having a tranny to put back in it when i dropped the whole exhaust in one piece the on the first cat the o2 senser was unplugged would this cause a decrease in gas mileage! help

 

model year and milage please

 

Yes it can cause lower gas milage depending upon which O2 sensor it was, that and combined with a HUGE exhaust leak. How much lower we talking about.

[Andyjo]

hey.. my milage is sucking too, i've got a leak right after the 2nd car.. right on the joint there.. thihnkning we're just going to weld the snot out of it, and get some new o2 sensors...

[95 super subbie]

model year and milage please

 

Yes it can cause lower gas milage depending upon which O2 sensor it was, that and combined with a HUGE exhaust leak. How much lower we talking about.

 

 

its a 95 awd legacy 5 speed 2.2 with 118,000 miles, just before the muffler there is a huge exhaust leak were i cut it off and tried to clamp it back on, i was only getting 20mpg babying the hell out of it.

if i went 160 miles it would cost me 20 dollars the fill it back up