Lambda problem
Discussion
Plugged laptop in as Cerb started running a bit rough, and found a lambda 2 fault logged. Basically, whenever the fuel pump is on (i.e. all the time when the engine is running) lambda 2 is showing 1.8v. Sounds like it is shorting out somewhere, but has anyone else had this problem? Also, can someone remind me which side of the car lambda 2 is on please!!
Any help much appreciated.
Joe
Any help much appreciated.
Joe
toadusmodus said:
BUMP
Nobody has any ideas? I'm guessing faulty lambda sensor, but just wanted to check before forking out for a new one.
Joe
Hope this helps you dignose the problem. I dont knpw which one is the left, and which is the right though Nobody has any ideas? I'm guessing faulty lambda sensor, but just wanted to check before forking out for a new one.
Joe
. The lambda signals should switch between approx. 0 & 1-1.5 volts. 0 volts shows that the fuel mixture is lean, 1 volt shows that the mixture is rich. If reading is a CONSTANT 0 V, check the Lambda sensor for proper connection, and sensor heater wires for continuity (6 ohms between white red wires) the WHITE wire is earth and BLACK the signal (only show a reading when the Pump is running).
Duke Thrust said:
Also, check the ECU connector plug for water, mine was wet and caused the same lambda fault.
Have recently re-located the plug inside the car as it kept getting water in it. Was originally under the expansion tank, what a genius location!! Think most likely cause of the lambda problem is water somewhere, will check the sensor itself, but who knows where it might be in the wiring now!!?? Will let you know what I find when I get a chance to crawl under the car.
Julian64 said:
If you get stuck you aren't far from me (Brands hatch), and I have a handy two post lift in my garage 
. The only problem is I'm doing my cam timing 'SLOWLY' at the mo, but should be finished around about the weekend.
. The only problem is I'm doing my cam timing 'SLOWLY' at the mo, but should be finished around about the weekend.Cheers Jules, I may well take you up on the offer, I have a feeling a large amount of swearing and injury is coming my way soon! I know the lambdas aren't the easiest dooberies to get to.
toadusmodus said:
Julian64 said:
If you get stuck you aren't far from me (Brands hatch), and I have a handy two post lift in my garage . The only problem is I'm doing my cam timing 'SLOWLY' at the mo, but should be finished around about the weekend.
. The only problem is I'm doing my cam timing 'SLOWLY' at the mo, but should be finished around about the weekend.Cheers Jules, I may well take you up on the offer, I have a feeling a large amount of swearing and injury is coming my way soon! I know the lambdas aren't the easiest dooberies to get to.
Just as a tip. When I checked mine over I tied a piece of cord to the half of the connector that's attached to the exhaust via the wires. I then lowered it down to work on under the car. When I'd cleaned all the green and brown crud off the connectors I used the cord to pull it back up to the top of the engine to reconnect it. It may save you some time.
As it happened the lambda was knackered anyway, but the connectors on both sides were lovely and clean - DOH!
MB
marcus1970 said:
toadusmodus said:
Julian64 said:
If you get stuck you aren't far from me (Brands hatch), and I have a handy two post lift in my garage . The only problem is I'm doing my cam timing 'SLOWLY' at the mo, but should be finished around about the weekend.
. The only problem is I'm doing my cam timing 'SLOWLY' at the mo, but should be finished around about the weekend.Cheers Jules, I may well take you up on the offer, I have a feeling a large amount of swearing and injury is coming my way soon! I know the lambdas aren't the easiest dooberies to get to.
Just as a tip. When I checked mine over I tied a piece of cord to the half of the connector that's attached to the exhaust via the wires. I then lowered it down to work on under the car. When I'd cleaned all the green and brown crud off the connectors I used the cord to pull it back up to the top of the engine to reconnect it. It may save you some time.
As it happened the lambda was knackered anyway, but the connectors on both sides were lovely and clean - DOH!
MB
Where are they then?
Julian64 said:
marcus1970 said:
toadusmodus said:
Julian64 said:
If you get stuck you aren't far from me (Brands hatch), and I have a handy two post lift in my garage . The only problem is I'm doing my cam timing 'SLOWLY' at the mo, but should be finished around about the weekend.
. The only problem is I'm doing my cam timing 'SLOWLY' at the mo, but should be finished around about the weekend.Cheers Jules, I may well take you up on the offer, I have a feeling a large amount of swearing and injury is coming my way soon! I know the lambdas aren't the easiest dooberies to get to.
Just as a tip. When I checked mine over I tied a piece of cord to the half of the connector that's attached to the exhaust via the wires. I then lowered it down to work on under the car. When I'd cleaned all the green and brown crud off the connectors I used the cord to pull it back up to the top of the engine to reconnect it. It may save you some time.
As it happened the lambda was knackered anyway, but the connectors on both sides were lovely and clean - DOH!
MB
Where are they then?
On the top side of the rear part of the exhaust manifolds, if that makes sense. I think.
Edited by toadusmodus on Tuesday 20th March 08:57
Back of the engine under the removeable lip upto the window, coming off the wire loom above the bell housing is where the connectors are; the wires then lead down to the exhaust just after the manifolds have become one pipe. The sensor sticks out with a nut that after a turn with a spanner should then undo by hand...hopefully...
MB
MB
toadusmodus said:
Duke Thrust said:
Also, check the ECU connector plug for water, mine was wet and caused the same lambda fault.
Have recently re-located the plug inside the car as it kept getting water in it. Was originally under the expansion tank, what a genius location!! Think most likely cause of the lambda problem is water somewhere, will check the sensor itself, but who knows where it might be in the wiring now!!?? Will let you know what I find when I get a chance to crawl under the car.
I meant the plug connecting to the ECU in the passenger footwell. I found that driving rain and high winds can cause water to run down the cable and collect inside the plug.
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