air fuel guage in 5th gen lude - Honda Prelude Forum

prelude_sh_vtec · 02-25-2002, 06:53 PM

Help, i am trying to put an air fuel guage in my prelude.
well i already did. im just trying to make it work correctly now.
i have the black wire grounded. the red wire going to constant power in the fuse box. i ran the purple wire to my oxygen sensor before the catalytic converter. I know it should work. it doesnt alternate or pan left or right. it just stays to the lean side of stoich when i am at no throttle and at idle and when i hit the gas it goes straight to rich. it doesnt scroll to rich. none of the other lights light up. just the last green rich light. then when i let of the gas it doesnt scroll to stoich or lean, it jumps right back to where it started from (to the last stoich light on the lean side). I have tried it on every wire of my sensor. different results. this is the only wire (white wire) that it even works half ass on. I have even tried another guage that i know works right. anybody got an air-fuel guage help. anything. a diagram??!! please!!!!

stumped

Turbo Lude SH · 02-25-2002, 07:30 PM

Same thing happened to me.

www.gadgetseller.com

Had him modify my guage and I am installing my new 02 sensor tomorrow or wednesday so I'll tell you if it works or not.

WDW · 02-25-2002, 07:54 PM

Does anyone know where the ECU is located please email me and tell me where its at wdwpincollectors@yahoo.com

Turbo Lude SH · 02-25-2002, 07:56 PM

The ECU? It's underneath the floor panel on the passenger side.

You're looking to buy some SH rims? I've got 4 powder coated white w/ tires. Let me know if you're interested. If the color is a problem I can fix that.

WDW · 02-25-2002, 08:04 PM

ya id be intrested in the rims i do need more info on the ECU location is it just under the carpet alone or do i have to unbolt something to get to it

prelude_sh_vtec · 02-25-2002, 08:04 PM

so i will have to get a new o2 sensor or the guage? or both?
thanks for responding

Turbo Lude SH · 02-25-2002, 08:10 PM

WDW - I emailed you with more info on the ECU and the rims.

prelude_sh_vtec - Nah, you just ship your guage to him and he modifies it and sends it back. I only needed a new O2 sensor cause I fried mine welding my downpipe on.

I don't know if this a fix or not though since I have not tried mine yet. I will let you know though.

Quaalude · 02-25-2002, 10:01 PM

tap into the white wire on the ECM connector D...this connector has 16 pins on it...the white wire is in the middle row, second from the left (terminal #7) when u are looking at the wire side of the female terminal...to count the pins, it goes from 1 at top left-hand corner to 16 at the bottom right hand corner...the white wire receives the primary O2 sensor signal

prelude_sh_vtec · 02-26-2002, 08:31 AM

anyone have a diagram???? thanks though

DirtyLude · 02-26-2002, 08:44 AM

This article is for a J&S, but it has everything you need to know. Use the ECU ground and don't ground to the body. You'll get too much noise that way.

http://www.hondaprelude.to/install_safeguard.html

Turbo Lude SH · 02-26-2002, 05:59 PM

To make it even easier:

In connector D, where the large GREEN wire is going to, it's tapping into the white wire you're looking for.

burban33 · 02-26-2002, 06:26 PM

You probably tapped into the wrong wire. I'm guessing you tapped into the o2 heater wire. The best bet is to go directly off of your ecu