Hello all

I noticed today that my 93wrx has no lambda sensor the metal bit is in the exhaust but with no wire Does it matter? anyone no why the previous owner would have done this ?

Appreciate any advice

 

Is it just the 05 onwards rear Lambda that can alter the fueling, the previous ones are just for checks?

 

Where are you looking down pipe or manifold?

I believe they are in the manifold on a classic.

Yes it should have a lambada.

 

93-96 pre facelift had the lambda in the manifold, 97 facelift onwards it moved to the downpipe

 

Without a lambda, the ECU is unable to correct fuelling so relies on defaults. This is not a problem on-boost but will potentially effect emissions, fuel economy, smooth running etc off boost.

Hacking the wires off would suggest the previous owner decided not to replace a failed sensor...but would think that would throw a CEL

Or, this isn't the "actual" lambda but the car is perhaps using an aftermarket exhaust and an old lambda has been used to block a superfluous lambda boss?

 

Thanks for the replys everyone appreciate it , it's on the downpipe. I was under the car today and didn't notice any wires*coming*of the manifold but I wasn't looking for any, where abouts Isit located?
Would it have been pick up during mapping?

 

Just had a look at paperwork and it's a full STI system

 

on my 95 wrx my sensor is at bottom of uppipe on manifold,hard to see with metal heat shields on, and plugs to loom that also has maf plug on.