hi. if ive de cat me exhaust should i disconnect the lambra sensor me 99 vti slill not runnin right no one seems to be able to help!!!.. been told possibly need more back pressure how could i do this.. if anyone could help!!!

 

were going to need some more information. like what kinda engine and modifcation u have done to ur car. becasue my car doesnt have a cat and it runs fine. unless ur car is goin into limp mode

 

its jst a standard 1.8vti dohc with the exhaust and induction kit..givin me loads ov grief but im determind to get it right. wat is limp mode, iv got a add on blue led between the clocks on the dash that comes on with the vtec thats earthd to the body and wired into the ecu. the car has had this b4 the previous owner and always worked fine, until the wire got pulled out with some muppits foot. pls any help would be much appreciated..........