Hondata

Evening guys and gals
thought id hook up the laptop the other day to check some settings etc and to have a tweak, also had noticed the car idling a little odd at times time to investigate

My wide band is a LC1 wired into the ELD [ELD disabled as i dont have this sensor], I noticed that Hondata and log works did not agree on the AFRs, Which is odd seeing they were spot on a couple of months ago.

So I decided to drop the car back into open loop and look into it when I could. Spent a couple of hours today checking the wiring and found nothing all seems to be as I installed it, no loose grounds etc, so started to check for voltage offsets set the LC1 to flat line and compared it to Hondata [im using ELD] there was a tiny difference of 0.15v so a small offset to now find.

Anyways during my testing I fired the car up with the Wideband connected and disconnected whilst watching the Log works, for each condition the AFrs where massively different, with Wideband connected 15.5 on log works, and with it disconected 12.5, engine was fully warmed up no errors and no iat/ect corection. I have also found that the Wideband voltage when connected to the ecu sometimes drops to 0.5 volts for no reason at tick over then comes back again, when it does this it is efecting the mixture as the log works says the AFRs has changed and you can hear a difference in exhaust note from it richening up, this was the odd idle I had noticed sometimes whilst driving. now this is a bit concerning as its changing the AFRs at tick over what if this is happening whilst im driving, the input voltage for the ELD shouldnt be effecting the fuel mapping like it apears to be.

Anyone got any ideas

WEST

Have you recalibrated the sensor in free air? Thats about the only thing i can think of.

Sounds like the wire going to the ecu may be grounding out soemwhere. I've seen this happen before.

an update

had another play with it today seeing its stopped snowing and warmed up


The Log works and Hondata seem to be almost agreeing with each other now only 0.05 volts different, and idle seems smooth again what I did

Removed and reconected the lambda sensor to LC1, and checked a couple of ground conections in the engine bay and checked the connectors I had used in the loom where I had an original honda plug missing, mainly wires for the gauges/warning lights also checked the two grounds amoungst this part of the loom,

so one of those has made it better. Going to replace the conncetors I used with some high quality conectors I now have which are 100% water tight. Then do a bit more investigation into this but the car seems alot better now

WEST

No problem has come back

Went to the drags for some testing and noticed it had the same problem as before, so couldnt do what I wanted...

Seems intermitant, one minute it works fine, then the ELD reading will drop to 0.5v and mixture leans out. disconect the Wide band from the ELD and the mixture rockets back to 12.5.

Stumped

Hopping to have a look later

WEST

I may have found the culprit,

Recent tests are indicating my LC-1 Wideband is loosing its analog outputs intermitantly :roll: when the outputs drop out and go to 0 volts, 1.26 volts is shown on the ELD, when the Analog outputs do this it is effecting the injector pulse widths.

Going to do more testing over the weekend,

Think ill be looking for a new wideband then :roll:

Th question is Do I Go PLX Not sure if I wish to use an LC1 that only last 6 months :!: :!: before going pop, liking the look of the R500 might as well upgrade at the same time

WEST

I highly suggest the PLX