fueling question

[crazynovagsi]

Hi, my car runs rich since i got my 4-1 manifold put in my 1.4 a couple of months ago. Could this be due to the lambda sensor not plugged in? or has the lambda got nothing to do with that.

[Royston]

probably

Car info might help, guessing a gsi nova with cat?

You can buy a boss and get it welded into the manifold

[crazynovagsi]

Its a nova 1.4 SRI didnt have a cat in it before had a straight through pipe with a 4-2 manifold but then got the 4-1 put in

[MK999]

yes, get the lambda put in. It's measuring free air so it thinks there's 0 combustion products in your exhaust, so it's fuelling more and more to compensate.

[crazynovagsi]

thanks yep will do wheres the best place to put it? and also will i have to extend the wires

[mowgli]

fairly close to where the 4 meets the 1 at a guess

[crazynovagsi]

Is it easier to drill the manifold for the boss or weld it innn

[MK999]

Is it easier to drill the manifold for the boss or weld it innn

Er you'll have to do both lol

[crazynovagsi]

can you not just drill the manifold and make a thread for it for the lambda to screw in instead of welding anything to it.

[mk1nova_rich]

nope because the tube wall of the manifold is nowhere near thick enough to thread

[crazynovagsi]

oh right cheers do u know if the lambda boss is m18 or m12 looking for it on ebay

[Royston]

Measure the Lambda sensor thread on the one you have, most older Lambda's are M18(standard Sparkplug size), some (like my Range Rover are M12)