Raceland 4-1 Lambda question

[philliantkr]

There are two holes in the manifold for the lambdas, one right at the top and one near the bottom on a different pipe than the first hole. If I put them both in won't it just bring the EML on?

[tarzan]

i put a sportex 4-2-1 in my furio and it actually turned the light off for me. wire brushed all the catalist gunk off it

[philliantkr]

Clean the gunk off what? There's no cat in the manifold so nothing is making the air any cleaner, so the reading from the second lambda is going to be exactly the same as the first...

[johnr32]

The first one gets plugged into the top of the manifold and the second one gets sleeved. Shouldnt bring the eml on this way.

[philliantkr]

Why is there two holes on the manifold then lol :( does that mean I have to buy a blanking plug

[johnr32]

Why is there two holes on the manifold then lol :( does that mean I have to buy a blanking plug

yep, GMC sell some on their site, could try ebay too?

[philliantkr]

Cheers, I'll just use an old lambda to blank it off with... why has it got two holes for lambdas though? Surely it would never benefit from being overfueled?