Can someone who's brain works better than mine confirm this...


robthedoc

civic disobedience
Joined
Feb 14, 2013
Messages
1,533
Guys I have an AEM 30-4110 wideband and I need a replacement bosch LSU 4.9 sensor for it.

I have come to the conclusion that the sensor plug on the 4.9 is the same across all the wideband set ups as its a bosch plug and PLX/AEM etc make there hardware fit the bosch connector.

Soooo

Can anyone confirm these two items are the same thing.... Part number on plug pic on first link and on listing on ebay....


https://www.telematica.uk.com/produ...nsor-LSU-4.9?gclid=CP-73Z7F5coCFSIUwwodQlMGvg

http://www.ebay.co.uk/itm/NEW-OE-UN...19-/251309593730?_trksid=p2141725.m3641.l6368
 
Different look at the part number on the picture of the plug an the one on the description in ebay

Ebay : 0258017119
Bosch: 1307021119
 
Standard situation then. Need the expensive one. There must be a guy out there the opposite of me who always needs the cheaper option. Lucky bass
 
The cross reference is the same,
I've got a aem wide band that's gone mental as well so I would be interested if the new sensor fixes the issue you've got
 
was going to stay mine looks nothing like those plugs.
AEM wideband afr gauge kit.
 
I was told that they are essentially the same just different plugs wired onto the ends. still forked out £60 for a new one though. :(
 
Please excuse my **** drawing
 
That's kinda what I was getting at but the picture could be display purposes etc.

There's a site that lists the differences and makes out the 4.9 is a better sensor but I mean if it's reading afr it's either reading it right or it isn't. Maybe more responsive?

The physical difference is the plugs a mates has the 4.2 and it's a fold over clip type plug like an ecu on a French car where as the 4.9 is just a push fit.

Plot thickens tho... Just drove the car to the garage to take down pipe off and.... Seems fine. Readings on the gauge were more what you would expect and reacted immediately to throttle changes.
 
You got some serious grounding issues in that car it seems?
Tbf you can tune it without the wideband assuming the dyno has one so its not going to stop you from tuning the car atleast, just bloody annoying lol
 
I have heard of people mentioning that it's best to ground the aem wideband in the same place as the ecu I. E. The thermostat. Also have heard of people having to remove resistors r136 and r138 to read correct voltage as stated on the hondata forums.

I would try changing the ground point first. I also have an AEM wideband but luckily didn't have any issues like this.
 
There are grounds everywhere lol. Its very messy but function is what I'm aiming for just now. Re the ground point I had also heard that grounding the wideband at the thermostat housing was favourable as it removed the need for a voltage offset in hondata.
 
Are you using the eld pin on the ecu for your wideband? If so maybe try disconnecting the resistors mentioned to see if that works.
 
Im using the analog inputs on the s300 mate, eld has been cut as I was having issues with fueling when electrical load was on.
 
When Aonghus figures it out let us know what it was..
 
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