Where does the Power FC read the air temp from? And whats a "good" reading while cruising, or after a WOT run

 

the factory airtemp sensor, its probably in front of the intake plenum or throttle body.
on full load, depending on boost and compressor maybe 50deg ? also depends on the intercooler effeciency as well

 

k, cause i looked at the temp today for the first time since i've had my power fc, and i was getting VERY low readings was curious if that was accurate or not........... it was a cool nite and i did a little back roads cruise and my temps stayed in the 13 degree celsius range.... it even dropped down to 9 after a 2nd/3rd gear pull

 

Both of you need to buy the Mazda manual and study section "F " if you REALLY want to know your engine's control systems.


The FD air intake sensor is located on the bottom of the upper intake manifold.
Due to the poor location, it will heat soak after the engine is turned off. When resuming driving, it will take a while to cool down again. This location gives a higher reading than the true air temp. This is why it is suggested to move it to the TB elbow like was done on the COSMO, or to the IC outlet.

I can't give you a meaningful reading because mine has not been in the stock position since 2000. But here during Houston's summer with my FMIC and with my fully warmed up engine compartment and cruising 60mph, in the mid 30s to low 40s.

Your temps are way too cold for the season unless it was about 45F outside. Compare it to the fuel temp in the morning when they should be within 3 degress of each other.

 

yea it was about 60 degrees out last nite, but like you said i also thought it seemed really low! thanks for the explanation, altho i coulda done without the thumbsdown, the whole point of this forum is to learn, right?

 

We expect more initiative and mechanical ability on this forum.
When you own a complex car like the FD, you MUST own the proper manuals and know you engine. Many answers are in the basic manuals.

We do not baby sit!

Being that your air temps were also a lot lower then the outside air temp, automatically means something is wrong with your AIT sensor values. Should not even have to ask about that. Should have gone directly into diagnostic mode and try to figure out why.

 

It also was directed at paulr33 who contributed bad information as he did not know what he was talking about.

 

haha yea ok. power trip much? i'm sorry that i'm not a know it all like yourself. and i'm sure you've NEVER asked anyone a question about anything, because your perfect like that. get real......

 

I only ask questions that can't be found in the manuals or that were poorly explained.

When I bought my FD in 1992, I immediately bought the manual and studied it for weeks, and I still read it periodically. Same when I bought the PFC and DL. I studied and played with all the controlls and settings to learn them.

I am not a know-it-all, but I know how to teach myself something new, and to not be lazy and expect others to teach me the basics.

You have a choice to make.

 

fact of the matter is, i asked a simple question, and instead of giving a simple answer you had to go out and try to impress me about how you memorized the shop manual. do you want a cookie?

 

Some owners just do not have the right stuff to work on their own cars, they should pay to have it done instead of trying to play mechanic.

I can even make and bake my own cookies. Can you boil water without asking for help?

 

haha so now you know everything about me personally too? because i've never worked on a car before how did you guess i guess that gt40r magically just appeared in my engine bay one day too. next your gonna tell me that my gas tank fills itself too, i don't even have to stop for gas its so matainence free!

 

WOW, cewrx7r1 where is your sense of comradery (sp)? I thought we as RX7 owners were in this together. We all own and work on a very complex machine and we all use this forum as a tool. I dont think there is any reason for your outright condescending remarks toward another member who is asking a simple question and looking for a simple answer. Get off your high horse and and act like an adult like the rest of us!

 

I came from the old school when there weren't any forums and the e-mail list was just starting. That was back in 1992 when the FD first came out. We learned through the manuals and trial & error with minimum outside help. These original owners were better educated, experienced, and motivated to understand their cars and to extract more reliable power from them.

The newer owners are buying their childhood dreams, and also want to modify them; which is good. But many of them do not even demonstrate the basic mechanical or diagnostic skills needed for this. Being of the WEB era, they want too much to be given to them without doing the work themselves. Ask instead of search and study is their method.

This downturn in automotive knowledge and mental maturity of the newer owners, is one reason why many of the older owners do not participate in the forums anymore. I still help out, but mainly on this forum as I am one of the chief contributors still around.

When I read questions that demonstrate lack of sincere work ethic, I will respond negatively. Being an old 61 year survivor of 7 years in the USAF during the Vietnam war and leukemia; I can care less about hurting the feelings of newbs who do not have the right stuff.

 

Amen Chuck, although I never knew you were 61 (now) or late 40's when you first purchased the FD. Chuck's one of a few members that still contribute to the PFC section, with knowledge we all can learn from but members need to have a working knowledge of the subject matter before they ask questions...especially basic questions that can be answered with 15 mins of searching on line or in a manual. Granted you can say "we all got to start somewhere" concerning our knowledge base but don't expect simple answers to be spoon fed to you. If that's what your hoping for, then you can see, you won't get it. Read, read, read, then if you don't understand something aleast you'll have a reasonable base of information so that when you ask and someone answers, they know you tried to find the answer, but the once the answer is given, it will click like trig did in high school. Not to mention the fact you just started a relationship with someone online that can help you down the road as well. Most of this information can be found on here in 1 form or another. From the old vent values for the PFS PMC and how it controlled boost to the PFC's boost controls. To not know where the AIT sensor is basically saying, I don't know what it's limitations are in it's stock location and how the ecu uses it to make corrections based on it for the fuel table. Why give someone a detailed answer when they don't even have a base of knowledge to apply it?

Tim

 

tell me this then.......as you said in one of your posts above, this car is NOT one that you just want to walk blindly into. while yes, i know in the beginning when you guys were "pioneers" you couldn't just ask someone and they'd tell you the answer, don't you also agree that its also BETTER for someone to ask so that they CAN learn about it before going ahead and messing with something that they really haven't a clue about? yes, i can work on this car. can i tune it? hell no, thats why i took it to enzo to have it tuned for me....i'm not going to go kid myself and say i'm a tuner. this is not the car to learn how to tune on imho. i asked about the air temp sensor as its somthing i can atleast monitor along the way.

now do you see where i'm coming from?

 

That is what I see as "where you are coming from"...

It takes a few minutes to find out in the manual where it is. If you own a car like the FD, especially highly modified as yours, wouldn't you want to learn more about it and then ask some questions?

Chuck wasn't bashing you on asking about the normal readings, just about the fact that you want the basic information spoon fed to you, instead of making an effort and finding it out on your own; and then someone else giving you incorrect information. So if Chuck didn't speak up at all, completely ignored you and you used the wrong info, possibly resulting in engine damage, would that have been more helpful?

If you don't have the service manual, I can email you a 93 or 94 if you'd like.

edit...

Looks like you can get them from here: https://www.rx7club.com/3rd-generation-specific-1993-2002-16/94-fsms-available-download-449950/

 

i have a service manual but i didn't have it on me, and i was just curious so i posted. i didn't think it was gonna be this big of a deal. i just don't like the fact that he's implying i'm some punk kid who bought this car and started throwing mods at it with no rhyme or reason. far from it. but i'm done with this cause i don't want to start a drama fest over nothing

 

nevermind...

 

sounds like u guys need to stop workin on the cars for 10 mins and get laid......a simple question just requires a simple answer..........if u dont think and answer is warranted due to lack of searching or informed knowledge........dont answer the question.....plain and simple

 

thanks for your two cents...