XE No Lamba :S

[ST-eater]

Hi all... Im running an XE engine (dizzy) with an FP ecu and dont have a lamba in the exhaust yet have a connection for it in the loom...

From what i remember there is a way of getting round this so the engine runs fine without the lamba connected... Can anyone point me in the right direction of how to fool the ecu? cheers

[Adam]

Yes you can ground a wire on the ecu pinout/loom, fook knows which pin it is though. Do a search on Migweb

[loggyboy]

Fit one, its there for a reason. No point in having your engine run lean or rich, you will loose performance and damage it in the long term.

[phazer]

Ground pin 20 on the ECU IIRC to run without Lambda.

[Stuart]

without the lambda its only going to run open loop and to a predefined fuelling table. The only way to knob the fuelling up is to play with the FPR lol.

even with a lambda it still isnt used at full load anyway

[Adam]

Yup, so you wont damage nothing at all.

[ST-eater]

great stuff, cheers all :D

[bigdave2009]

have same problem.....how do i find pin 20 on ecu????

[GRUNT 16V]

1.2.3.4.5.6 and so on !!!!

[paul james]

Can the same be done on a 2.0 Ecotec X20XEV?

[bigdave2009]

yes...i understand numerical values, lol, but is there an easier way of finding it? Is it not any of the wires for the sensor?? Has the pin in question got a wire coming from the ecu plug??

[bigdave2009]

also, is doing this safe??? i know phazer said the ecu runs from a predifined fuelling table, but will this mean it runs rich at all??

[Rich]

Just fit an o2 sensor, you will need to get your fuelling etc setup.

An o2 sensor will sort your fuelling for you and run better. Be better on fuel..

[bigdave2009]

ok i`ll tell u my problem, i have a lambda/o2 sensor but its snapped when doing conversion. i`m not sure which way around the two white wires get re-attached. heard it can cause loom meltdown if attached incorrectly?? is there anyway i can find out??

[Jack]

O2 sensor = Oxygen sensor = Lambda sensor

[Stuart]

the white wires should be for the heater and if thats the case it matters not which way round they are

[bigdave2009]

is that def??? read on mig otherwise???

[Stuart]

its either going to be a one wire sensor or a three/4/5/6

[bigdave2009]

its a three wire sensor. just read on other sites that two white wires are for heater. what do they actually do?? could i not just run the one black wire??

[Stuart]

white wires for heater, dosent matter what way round they go.

black wire to ecu lambda pin.

[Rich]

It does make a difference i think, i cant see it causing any problems other than o2 sensor not working properly. If it doesnt work one way just try the other

[Stuart]

hmm we never worried what way we did the two heater wires when I used to work with that kinda gear.... still willing to be proved wrong though

[bigdave2009]

what do the white wires actually do to the heater???

[Stuart]

they run it

[bigdave2009]

what.....supply power?? im very confused.

[phazer]

Yes, the heater requires 12V.

On standard Bosch sensors:

Black = Signal to ECU
White (x2) = Heater
Grey = Signal Earth (on a 4 wire sensor, the others earth via sensor body)

[Benn]

Can the same be done on a 2.0 Ecotec X20XEV?

I don't believe so, just fit one.

[Rich]

hmm we never worried what way we did the two heater wires when I used to work with that kinda gear.... still willing to be proved wrong though

Im not 100% but i know when trying to sort it out on my mates astra (he snapped the wires pulling engine out of donor) we were only getting readings on tech 1 a certain way with the white wires. I cant see how it should matter personally as its only connecting a circuit

[bigdave2009]

i cant see how the white wires can run the heater???? My XE is in a nova, the heaters ran fine before i put XE lump in, and the old 1200 motor never had a lambda sensor??? WTF?????

[Stuart]

lmfao.

the lambda sensor itself has a little heater in there to get itself upto 300+degrees. nothing to do with the cars heater

[bigdave2009]

right.......now were getting somewhere. Lol. Eeeejit!?!

[Rich]

i cant see how the white wires can run the heater???? My XE is in a nova, the heaters ran fine before i put XE lump in, and the old 1200 motor never had a lambda sensor??? WTF?????

hahahaha you deserve some rep for a comment like that lol

[Benn]

i cant see how the white wires can run the heater???? My XE is in a nova, the heaters ran fine before i put XE lump in, and the old 1200 motor never had a lambda sensor??? WTF?????

Rep'ed, just cause i laughed out loud.