167 replies to this topic

[techieboy]

Probably stupid but you are connecting via OBD as if you're connecting to a <2003 VXT aren't you? Just in case that treats the error codes or PID's differently.

[The Batman]

I did 2002 vxt

[techieboy]

[alanoo]

Any chance of a mistake in the wiring harness ? Mixing the two lambda plugs ?

[Exmantaa]

Somebody from the .org collective should "Opcom" a standard Z20LET and compare how the O2 sensors show up there.

Edited by Exmantaa, 25 January 2012 - 11:22 PM.

[starlight]

Somebody from the .org collective should "Opcom" a standard Z20LET and compare how the O2 sensors show up there.

Pretty sure no1 O2 sensor on OPCOM is for the pre cat sensor, the connector for which was by the end of the block on top of the gearbox. No2 lambda was the postcat O2 sensor, and the connector for that was on the rear subframe, gearbox side.
Edit: And the connectors are both the same. Think I remember another socket on top of the gearbox that looked very similar to the O2 sensor socket....
Hope that helps?

Edited by pjohn151, 26 January 2012 - 02:01 PM.

[Exmantaa]

Something is fishy then with Joe's readout... Sure about the #1 and #2? Knew the Z20LET also had a square blue/black connector (right?) for the 2nd O2, but maybe the male/female part were switched? That's at least how it was done on my original LSJ loom to avoid connection errors... Joe has a mission this weekend. Edit; Not sure what they all modified and tricked on the Z20LET loom, but maybe they used some resistors in the post cat sensor wiring and therefore his O2 #2 now shows up as 451mv. And his O2 #1 doesn't show up because it's broken or has a wiring glitch somewhere, causing his fuelling issue... Vocky?

Edited by Exmantaa, 26 January 2012 - 02:42 PM.

[vocky]

Joe's loom has only one lambda plug, I removed the post cat sensor wiring because courtenay were going to switch that off in the map. I would also guess the 451mv is a generated stable signal rather than the lambda sensor reading, it doesn't move even 1mv when the engine is rev'd Plus the ecu and afr were fine until Joe was half way to cms, something failed during the journey, so the lambda sensor is worth replacing first

Edited by vocky, 26 January 2012 - 03:04 PM.

[alanoo]

So a fried lambda heater control is about the only option as it is the only thing the ECU can detect as soon as it is plugged and on a cold engine

[JimmyJamJerusalem]

I would also guess the 451mv is a generated stable signal rather than the lambda sensor reading, it doesn't move even 1mv when the engine is rev'd

[NickB787]

I have just ordered another ctek charger so can this thing charged and then I can get my elm327 up and working, if not it goes in the bin and I will get anything with works properly.. I hope to then check how many lambdas I have hooked up as far as the ecu is concerned.

[Exmantaa]

How are the AFR's doing today? Any progress??

[The Batman]

double shifting at the moment and have an astra on my drive that is going tonight i aim to work on the car on sunday

[NickB787]

battery is charging someone with an Op-Com is nipping over tomorrow so will see how many lambda's the ecu thinks I have

[NickB787]

Techieboy was kind enough to nip over and reset my abs and airbag light one thing we noticed was that my second o2 sensor was not working but showing 451mv same as Joe's so it's stable signal thats all.

Edited by NickB777, 28 January 2012 - 03:50 PM.

[techieboy]

No problem, happy to help. Attached is a quick CSV (renamed to .txt to allow upload) log file from OP-COM with the output from Nick's ECU. Not sure if it's of any use but might give you some comparison.

Attached Files

•  Livedata_2002_Speedster VX220_Engine__Z 20 LET_201201281444.txt   43.99KB   26 downloads

[The Batman]

OP COM is pretty cool! right, i have changed the lambda sensor and still had lowish afr 11ish have changed the AMM and now i have 13.7 afr but not the 14.7 aff i had before on idle... strange! what you lot think?

[The Batman]

[The Batman]

my amm is definately fooked!

[techieboy]

See, it really is like having a turdo now. It's eating AMM's just like they do.