why do people connect a senser to the cat to tune a car what are they reading they were doing this to my car and had no idea they said they were trying to get the numbers to come down it was reading 16. something any info would be greatly appreciated.thanks

 

The cat sensor is an O2 oxygen sensor. I have no idea what you're asking about though on "trying to get the numbers to come down it was reading 16" as poeple don't generally tune to the O2 sensor alone unless they have an emissions problem. It's a factor in tuning, but certianly not the only one.

What is sounds like you mean by "reading 16" is where people are trying to get the air/fuel ratio adjusted. And the reading they are generally after is stoichiometric or richer, or 13.5 to 14.7 or so.

If you could restate your question and provide links to what you read that is confusing you, it would help.

 

thank you omicron you just answered my question.the shop i had my car was trying to lower the air fuel ratio reading 16 and higher but had no luck in doing it.they tryed adding fuel and the car didnt even show signs you were messing with it ..

 

can you explain a bit more about the conditions the were tuning in? were they tuning based on results from a dyno run at wide open throttle? what were the using to get the readings? how were they making adjustments. if you can answer these questions we can tell you why it wasn't working.

 

You bet. Sounds like you'd be better of going to a Mazda dealer, unless you're having them tune a Canzoomer unit...

 

well they were trying to tune my canzoomer unit. on what they were using to get the reading,all i know they hooked up something to my cat. with a meter .the car was on idle and then they started to try to tune it .but it would not do a dam think when they tryed playing with it.

 

the canzoomer unit cannot effect a/f ratio at idle. the pcm is completly in control unless you are at WOT. the only way to see the changes you made is to make them and then do a dyno run or gtech run recording the a/f. then adjust again and do the runs again until it's tuned to your liking.

 

Frankly, if they were trying to tune the idle mixture that way you should get in your car, drive away and never go back again! What kind of shop was this?!

jds

 

yeah bureau i was thinking the same thing

 

acosta racing i thought they new how to tune but he says the canzoomer unit is crap and no way can you tune this .

 

Acosta Racing said that? If they were trying to tune your Canzoomer unit at idle and telling you it's "crap" then that CLEARLY demonstrates to me that THEY are the ones who don't know crap. Oh brother. I'm disappointed.

But come to think of it, all I can recall them doing is stuffing a 3 rotor 20B engine into an '8... but never any tuning with the existing Reneses engine.

Sounds to me like they are either incompetent, or they are trying to BS you to sell you something else. Regardless, my advice to you would be:

Run away! Run fast! Never go back!

 

lol i sure iam with a 400 $ dollar bill that i have to pay.i told him the unit is not even tuned and he said for spending time trying to tune it.its not my fault the unit cant be proggramed. so i get my car tommorow and see what ill do from there.

 

DUDE TELL ACOSTA TO GET ON THE FORUM HERE (THEY'VE BEEN HERE BEFORE) and talk about this or have them call Canzoomer.

 

he called canzoomer allready and acosta told me he dont know ****. acosta racing said they been tunning piggyback for a long time and that this canzoomer unit wont work.

 

Ok, i'm goin to reply here. we have been tunning rotary engine for the last 10 years, using real computers, MOTEC, HALTECH, ELECTROMOTIVE, & MICROTECH

What i explain to sergio is that the canzoomer computer does not work, AND anyone here that tells me other wise, hasn't dyno the car, or takend the car to any track. i put sergio car on the dyno using a MOTEC meter. explain this to me,

1. i run the car on the dyno without the CZ and it makes 184. i plug the computer on, and the car makes 154.

2. second i start tunning the car and notice that the air/fuel ratio is 16.2 on top end ( extreme lean) i add and add and add fuel , and the fuel ratio stays the same.

if u can make not even the idle better, then what the hell are you doing waisting your time. i call maurice on the phone, and explain to him what's goin on, all he can say is you dont know how to tune it. i did everything he said, and no change, and guys AIR/FUEL is everything, and that's what tells you if the crap is actually working or not. and I'M not the only performance shop claiming this, call petit , call SR, call Rx-7.com ALL OF US CAN'T BE WRONG. ( IF you want to keep thinking that you are getting more power, good for you.

 

ok then run away run away very quickly.

 

read the feed back, on all this forum,, many people have post the same thing.

OMICRON: WHY do you post on this forum when it's a negative feedback to CZ. please PM ME THAT ANSWER, in private

 

This is definetely not good news for the canzoomer followers .Cant be tuned ????WTF .

michael

 

if you would turn on your pm's using your user control panel then i would be most happy to discuss this with you privately. the information that has been provided so far does not make you look good. YOU CANNOT CHANGE THE A/F WHEN THE PCM IS IN CLOSED LOOP MODE WITH A CZ UNIT. at idle the car is in closed loop. the cz only works when the car is in open loop which means WOT. all the changes you make to the a/f maps in the CZ are only in effect under WOT. trying to change the cars idle a/f is not what the CZ is designed to do. to effect the car when it is in closed loop mode you would have to reprogram the PCM which noone in the states has been able to crack.

 

look i'm not goin to bad mouth no one, i told maurice that i had a motec meter on the car telling me the air / fuel ratio of the car, ( wide band) and you know what he told me on speaker phone, that sergio was there and heard it, is that the motec is not good. ANY one who know about computer tunning knows there's almost nothing better than a motec meter. and i even put a brand new sensor just to double check if it was the sensor that was wrong. i even put it in front of the CAT and behind the CAT. i really think is a waiste of money. and no one in this forum till this day still has proven me wrong, no one has seen any gain in hp, with ACTUAL DYNO and even in the track. how can you explain that you turn off the CZ and the idle goes back to normal ,,nice and smooth AND turn it on, and it gets bad. AND dont give me that story about the mass air flow, come on guys you really think mazda was goin to spend all this money on this car, and put a cheap mass air flow, or better yet, like other post i have read, put different mass air flow, SOME CARS WORK AND SOME DONT ( BS!!!)

i'm tired of people buying product that dont work and getting shaft with it, this is why more and more people are disapointed with this car.

 

sorry i can't i got band from PM, email me acostaracingll@aol.com

and no i wasn't trying to tune on idle, i was tunning top end, I call cz, to see if there anything we can do to fix idle. that's all

 

If my presumptions are correct, Jeff Abrams has had good results using an E-Manage unit on his 8. Perhaps mail him and see if he'll throw in his two cents.

Charles

 

the e-manage work good on the rx-8. but that's from greddy not CZ

 

Ok From The Info Given Earlier It Sounded Like You Were Trying To Change The A/f At Idle. Now I Understand That Is Not What You Were Doing. I Think What You And Sergio Are Saying Is That When The Cz Unit Is "on" The Idle Goes Rough And You Were Trying To Find A Way To Fix That. Is That Correct?

Also The Cz Unit Is An Emanage With Custom Wiring Harnesses,maps Etc. But It Is An Emanage Box. Second Ask Omicron Or Polak Or Any Number Of People Who Most Cetainly Have Dynoed More Power With The Cz Unit. Especially Polak. He Is In Your Area And Initally Had Problems When His Cz Was First Installed. But After Tuning He Has A Noticable Increase. In Other Words He Was At One Time In The Same Situation That You Are In Now. Thirdly There Is Most Definitely A Problem With Some Mafs Being At The Bottom Of The Spec Range And Some Cars That Have A Mafs Like This Experience Idle Roughness And Pinging Even In Stock Form That The Rest Of Of Don't. Some People With The K/n Cai Have Idle Problems That Are Because Of This. Just Like Some Cars For Some Cars The Cz "stock" Maps Have To Be Changed In Order To Tune For That Specific Car.

 

One More Thing Acostaracing- If You Have A Can Protocal Scanner Can You Get A Mafs Voltage Output Reading At Say 7k Rpm? I Have Some Numbers To Compare It To. Thanks.