93SSPHatch

1993 Honda CX with 94 B18C SiR-G

Here's the problem...

I have gone through two Carsound cats in eight months

I believe I am running rich, and it may be caused by defective/old 02 sensor (no CEL is showing)

I bought a Halmeter AF30 to help determince whether or not the stock 02 sensor is the cause of my problems.

Hooking the A/F gauge up (the search did not answer my questions):

Can I use the same ground/power wire that I used to connect my VAFC, or do I need to find another location?

BlackDeuceCoupe

Couple of things here:

1) O2 sensors don't last forever. They usually last, on average, about 50k. They need to be replaced just like batteries or tires.

2) A/F gauges won't do a thing for you unless they cost 1000's of dollars. The problem is the sensor sensitivity. Without getting technical, the sensor in a cheap guage isn't accurate enough to tell you anything.

Personally, I'd replace my 02 sensor[s]. Otherwise you're like a dog chasing his own tail...

93SSPHatch

Thank God. . .BDC, you are back!

I originally just wanted to swap out my old 02 sensor ( it is a CX sensor with 87,000 miles on it), but I wanted the A/F gauge to at least get some sort of idea if I am running rich/lean. I am sick and tired of having the cat blow out every four months.

1. Do you know if I should get a 1994 GSR 02 sensor to match the engine I am currently running? (right now I am using the CX sensor).

*I really kind of regret spending the $140 for the A/F meter, but I kind of figured it would help a tad of a bit when trying to monitor the A/F ratio.

BlackDeuceCoupe

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93SSPHatch &raquo;</TD></TR><TR><TD CLASS="quote">...Do you know if I should get a 1994 GSR 02 sensor to match the engine I am currently running?...</TD></TR></TABLE>

That's what I would do. It shouldn't cost that much. Be glad you don't have one of those new 'green' engines that Honda makes with the dual highband sensors. It costs like $400-$500 for the pair.

This kind of points out the problem with cheap A/F gauges too. If a highband O2 sensor costs (say) $300, they can't sell meters for $140, you know? So, by necessity, they have to use a cheaper sensor which isn't very sensitive to change, blah, blah, blah...

Anyway, it can't hurt to change your O2 sensor[s] every 50K...

93SSPHatch

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BlackDeuceCoupe &raquo;</TD></TR><TR><TD CLASS="quote">

That's what I would do. It shouldn't cost that much. Be glad you don't have one of those new 'green' engines that Honda makes with the dual highband sensors. It costs like $400-$500 for the pair.

This kind of points out the problem with cheap A/F gauges too. If a highband O2 sensor costs (say) $300, they can't sell meters for $140, you know? So, by necessity, they have to use a cheaper sensor which isn't very sensitive to change, blah, blah, blah...

Anyway, it can't hurt to change your O2 sensor[s] every 50K...</TD></TR></TABLE>

Thanks again BDC, I just purchased a universal Bosch O2 sensor from Autozone for $69.95. I will definitely be selling my new Halmeter AF30 that I just purchased.

on myself for thinking a cheesy A/F gauge could help fix my problem.