tompstomps

Hi

Ive got a 2.0 focus ESP

Its got a cat back system with no centre silencer and is very loud

It also has the standard manifold and cat, which annoys me.

Ive bought an ST170 manifold from the bay, and am aware that i also need to find an ST170 flexi hose, in order to mate the mani to the 'zorst.

My question is, what do i do about the green and blue lambda exhaust sensor plug things??

Do i somehow attach them into the mani? Or just leave then unplugged? Rip them out etc??...

I.e. Are they needed for the running of the car? And without them it wont run, sort of thing.

Also, finally, the car WILL be de-cat when the mani and flexi are in, because in the 2.0 the cat goes straight on the mani, whereas in the ST170 it goes midway in the exhaust system. So basically where do i stand with and what do i do about the sensors?

Cheers

oldford

No reply.

RichieST

iTrader: (2)

It will fail the MOT emissions test without the cat fitted, so you will need to swap back come MOT time.

As for the sensors, you will probably need to use the ST170 ones as the positioning of them is different so the wires are a bit longer. Either that or you could extend the wiring on your original sensors, which are currently positioned either side of the cat in its current location.

some of the early cars don't have a post-cat sensor, if this is the case, then fit the sensor to plug the hole, and chop the wiring off / tie it securely out of the way.