anyone with a 172 and decat

[16v_jon]

right people, been having probs with my engine management light coming on, on the clip it shows up throttle possition sensor and pre cat llambda sensor, replaced both with brand new ones ok for 3 weeks and car running sweet, now the light is back on.
now who has a decat and if so have you unplugged the second sensor?
reason why i ask is when i unplug mine i seem to use more fuel and the car runs sh*te!
thanks for any info

 

[Neil82]

I've had my de-cat on my Cup for about 2 years with both sensors plugged in and its been fine (touches wood) Why are you uplugging the second sensor if it runs ok with them both in?

 

[Mike@Rentech]

mine runs fine with the de-cat (but I'm sure I got sent a sports cat by mistake), both sensors connected and emissions are as it would be for a car with a cat fitted.
Cant say Ive had a problem with mine.

 

[theduck]

^^^lucky git

 

[edde]

You don't need the second sensor it usualy causes the emmisions light to come on so unplug it it makes no difference to power.

 

[16v_jon]

You don't need the second sensor it usualy causes the emmisions light to come on so unplug it it makes no difference to power.

It makes a difference in power to mine big time

 

[16v_jon]

mine runs fine with the de-cat (but I'm sure I got sent a sports cat by mistake), both sensors connected and emissions are as it would be for a car with a cat fitted.
Cant say Ive had a problem with mine.

I tested mine on the sun emmitions tester and the co2 was double what it should be, also hydrocarbon were mad! im gonna have the loom out this weekend and check that i think see if there is anyhting loose

 

[Fred@BTM]

try removing the second sensor from the exhaust, but leave it connected to the loom