Sign in to follow this  
Followers 0

Plugs are black - faulty lamda

8 posts in this topic

Just recently finished a 2e to 4efte conversion.

When the car runs it smells very rich and is quite smokey.

On the 2e it had a 2 wire lambda and ov the 4efte one is single wire.

Is it likely to be faulty lambda?

Pretty sure I traced the correct wire to the ecu for the sensor.

Share this post


Link to post
Share on other sites

All 4 plugs black? Could be bad lambda, water sensor or othet things. Is the ecu giving any codes

Share this post


Link to post
Share on other sites

I doubt it's lambda. I ran mine without for ages and made no difference on the wideband

Share this post


Link to post
Share on other sites

Running no lambda and a faulty one are 2 different things. If there's no lambda plugged in then the ecu knows that and runs a slightly richer map for safety.



If the lambda is faulty giving wrong readings then the ecu will try to fuel according to that reading.



My lambda sensor was reading rich constantly so my ecu was underfuelling the car causing it to run like shit. Unplugged the sensor and it ran fine.


Share this post


Link to post
Share on other sites

Car didn't run differently on the wideband with no lambda and a working lambda..

Could just be my car but never noticed a difference. With or without idled at 14.5-15

Share this post


Link to post
Share on other sites
On 6/21/2017, 12:12:57, Ollieh17 said:

Car didn't run differently on the wideband with no lambda and a working lambda..

 

Could just be my car but never noticed a difference. With or without idled at 14.5-15

Mine runs fine without a lambda and its not been in there since I fitted the TD04, numbers are a bit sloppy on idle but on boost it runs fine but rather rich. PLugs look absolutely fine and I'd rather run rich than lean personally. From what I read the lambda is only really noted on idle, after that the map sensor takes over.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0