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i have been lazy to fix this, but now i think i should.

i dynoed my car a while back and got a pretty good number. However, on the second run (back to back) i lost 10whp. the head guy there told me it was due to my o2 sensor heating up which sent a signal to my ecu which caused my car to run rich. i can't remember much of the details, but they suggested hondata would fix this problem. However, i was hoping for a cheaper fix. would a vafc fix this?

TIA

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someone's gotta know.

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anyone can diagnosis the problem? Sometimes when I punch it I do smell gas, but only when I'm on it. Otherwise, I get decent gas mileage.

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ttt

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5th bump. c'mon guys! it's not like it's a classified ad!

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any analysis? comparison?

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7th bump...

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a

Jonathan_ED3

I've never heard about the 02 'heating' up.

What I have personally experienced is a faulty Knock Sensor that gets kind of a heat soak, and causes the engine to run soooo sluggish/bad. loss of power.

If you really think it's the 02 sensor, just buy a new one!

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

If you really think it's the 02 sensor, just buy a new one! </TD></TR></TABLE>

I have an extra, but i don't think that's the problem. it was something else...i can't remember. I think Kevin (was it kevin), owner at IB told me...

R_yd

have you tried running a different ecm?

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<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by R_yd &raquo;</TD></TR><TR><TD CLASS="quote">have you tried running a different ecm?</TD></TR></TABLE>

wouldn't know unless i dyno it. oh well, guess it's time i should look into tuning.

BlackDeuceCoupe

OMG!!! Hey, Homer, replace your phucking O2 sensor[s]. Get a second job if you have to. Welcome to the world of Hondas...

Kamin

i have never heard of an o2 sensor "heating up"

dont know what to tell you.

if the motor wasnt cooled properly between runs that can cause HP loss

BlackDeuceCoupe

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kamin &raquo;</TD></TR><TR><TD CLASS="quote">i have never heard of an o2 sensor "heating up"</TD></TR></TABLE>

Okay, President Clinton. Let's parse the words now...

The guy said your O2 sensors are 'F'ed up. Listen to him!

What many ppl don't realize is --- O2 sensors, on average, only last about 50k. At any given time, 20% of the cars driving down the road have bad O2 sensors in them. They don't last forever. What makes you any different?

Replace the 'F'ing sensor[s] and get back to us...

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<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kamin &raquo;</TD></TR><TR><TD CLASS="quote">i have never heard of an o2 sensor "heating up"

dont know what to tell you.

if the motor wasnt cooled properly between runs that can cause HP loss</TD></TR></TABLE>

but would that be a cause for me running rich? it's really slight too.

BlackDeuceCoupe

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by all stock &raquo;</TD></TR><TR><TD CLASS="quote">but would that be a cause for me running rich? it's really slight too.</TD></TR></TABLE>

Yes!!! You need to study the 'theory of operation' of a OBD equipped car. They ALL work pretty much the same...

In a nutshell: when you first start your car, everything runs off a program in your ECU's ROM. It runs rich and so forth -- just like you got a choke on a carb closed, or whatever (sorry for being rudimentary, but there's a reason).

Once the ECU decides all the sensors are working, and everthing is in normal operating mode , yada, yada, and yada, the O2 sensor[s] take over FULL operation of your engine. Hello?!?!?! Read this again if you don't get it...

IF, and I say IF, any of the sensors aren't working, your engine reverts back to 'start-up' mode --- just like having the choke fully on -- just like a cold start ---all the time, e.g it runs rich --- all the time. This includes the O2 sensors...

The sensor[s] most likely to fail are the O2 sensor[s]. Most all problems with CEL's and so forth are O2 sensor related. It is a common problem.

Without going further --- believe me or not --- believe the dyno guys or not --- this is most likely your problem. It doesn't take a rocket scientist to figure it out. Listen to them and me --- not the mullets on this web site. Replace your O2 sensors...

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

Yes!!! You need to study the 'theory of operation' of a OBD equipped car. They ALL work pretty much the same...

In a nutshell: when you first start your car, everything runs off a program in your ECU's ROM. It runs rich and so forth -- just like you got a choke on a carb closed, or whatever (sorry for being rudimentary, but there's a reason).

Once the ECU decides all the sensors are working, and everthing is in normal operating mode , yada, yada, and yada, the O2 sensor[s] take over FULL operation of your engine. Hello?!?!?! Read this again if you don't get it...

IF, and I say IF, any of the sensors aren't working, your engine reverts back to 'start-up' mode --- just like having the choke fully on -- just like a cold start ---all the time, e.g it runs rich --- all the time. This includes the O2 sensors...

The sensor[s] most likely to fail are the O2 sensor[s]. Most all problems with CEL's and so forth are O2 sensor related. It is a common problem.

Without going further --- believe me or not --- believe the dyno guys or not --- this is most likely your problem. It doesn't take a rocket scientist to figure it out. Listen to them and me --- not the mullets on this web site. Replace your O2 sensors...

</TD></TR></TABLE>

Okay.

RSZero1

Hey zach, if you need an o2, i can get you a replacement for $30, IM me