Testing O2s

Not saying your O2's are the cause of your sluggishness (is that a word ) but I can say they most likely are not effected by running lt's if you keep things in the context of your Q.

Usually where lt's cause an issue is when at a long stop light, they can cool down a bit and the adaptive starts to compensate but they cool so much the adaptive range is exceeded and then it don't take long to arrive at hose up city.

I've seen some say that after the adaptive has helped as much as it can, the car starts to surge and shortly dies.

anyway ........

When you get moving, the heat quickly builds and that issue is gone.

You get info from various tables that rely on temp, load, time, rpm, and the like when you are in O L so yes ... the O2's are not in play during O L.

The fact you got a Fox pcm should not be an issue here IMHO.

I don't know about running without the O2's and what that might mean other than ... It ought to run OK when at WOT.

btw ... lambse/lambda is the commanded fuel ratio by the pcm. Those ratios can be seen in the fuel tables and they show up in the datalogs.

The data from the O2's will be seen by hego values.

As Scott said, you could reset the pcm but if there is a prob, it won't take that little silver box long to reach the limits of its help and you'll be right back to the same place.

You say the car is sluggish ...........
When did it start?
Was it after you changed the O2's?

If it runs no better after you put in new O2's ........
it would seem they are not suspect

Grady

final5-0 said:

btw ... lambse/lambda is the commanded fuel ratio by the pcm. Those ratios can be seen in the fuel tables and they show up in the datalogs.

The data from the O2's will be seen by hego values.

Click to expand...

Grady, I suppose I should ask, so as to nip confusion in the toosh............. For the tuning crowd, is referring to an oxygen sensor as a lambda confusing? I cut my teeth on Euro cars (Bosch engine management) and Bosch called O2's Luft sensors or Lamdas, as I recall. If these terms are not interchangable in the mainstream (or with Mustangs), I'll try to remember not to say Lambda when O2 or HEGO will suffice.

And you guys use the terms O2's and HEGO interchangably, right?

HISSIN50 said:

Grady, I suppose I should ask, so as to nip confusion in the toosh............. For the tuning crowd, is referring to an oxygen sensor as a lambda confusing? I cut my teeth on Euro cars (Bosch engine management) and Bosch called O2's Luft sensors or Lamdas, as I recall. If these terms are not interchangable in the mainstream (or with Mustangs), I'll try to remember not to say Lambda when O2 or HEGO will suffice.

And you guys use the terms O2's and HEGO interchangably, right?

Click to expand...

As always JT, your broad knowledge background is so obvious

I have to say my input in this thread very well may be a source of confusion even though I know what I said is true

I do admit to having a vary narrow perspective of electronic tuning as I only deal with Fords and the only Fords I deal with are Stangs and then the only Stangs I've had the most expericnce with are 94-95.

When you add the fact my only self tuning experience is with the EEC Tuner/Tweecer interface, you can see how small and limited my area of experience is here

I have seen the word lambda used with the Fox Stangs in the same context as lambse is used with our Stangs and in both cases, it is all within the Tweecer environment.

When I used the word hego, I was again speaking from the Tweecer perspective since you see the output or datastream of the O2 is defined as a hego value when you look at the raw data in the logs.

Like you JT, I have seen the word lamda, lambda, or however it is spelled, used when talking about O2 sensors.

These words and acronyms can get confusing

Tweecer calls the idle speed controller a isc but others say iac

Tweecer calls the air charge temp sensor act but others say iat

I try to remember and use the more commonly used way when working in these threads but sometimes I forget

What the Hey ... I think we all are on the same page

Grady

final5-0 said:

As always JT, your broad knowledge background is so obvious

I have to say my imput in this thread very well may be a source of confusion even though I know what I said is true

I do admit to having a vary narrow perspective of electronic tuning as I only deal with Fords and the only Fords I deal with are Stangs and then the only Stangs I've had the most expericnce with are 94-95.

When you add the fact my only self tuning experience is with the EEC Tuner/Tweecer interface, you can see how small and limited my area of experience is here

I have seen the word lambda used with the Fox Stangs in the same context as lambse is used with our Stangs and in both cases, it is all within the Tweecer environment.

When I used the word hego, I was again speaking from the Tweecer perspective since you see the output or datastream of the O2 is defined as a hego value when you look at the raw data in the logs.

Like you JT, I have seen the word lamda, lambda, or however it is spelled, used when talking about O2 sensors.

These words and acronyms can get confusing

Tweecer calls the idle speed controller a isc but others say iac

Tweecer calls the air charge temp sensor act but others say iat

I try to remember and use the more commonly used way when working in these threads but sometimes I forget

What the Hey ... I think we all are on the same page

Grady

Click to expand...

Grady, I havent seen a post with that many qualifiers in a long time.

I'm gonna have to disagree with you though. Me-thinks your posts on threads like these are the helpful ones , and mine are sources of confusion and are a lack of assistance.

It sounds like almost any of the terms used are alright on a thread like this - it's in a tuning environment where one should speak more precisely (because for instance, if someone said to check the O2 value, it might be . But when you say check HEGO value, that's ).

Not even Mustangs can keep it straight with the IAT and ACT (SN95's have the former and foxes have the latter).

I thank you again for your clarification. I wont be able to remember any of what you said, so I'm sure I'll be using unTwEECerish terms again - just keep correcting me.

HISSIN50 said:

I thank you again for your clarification. I wont be able to remember any of what you said, so I'm sure I'll be using unTwEECerish terms again - just keep correcting me.

Click to expand...

IMHO ...NO correction on your part is needed my friend

I seriously doubt Tweecer speak is considered to be the definitive

be all OR end all ... of these tuning discussions.

I've just slipped into that warped way of thinking

Grady