GM MAF, air temp always at 80 degrees?

[hystericfox]

I'm running a GM MAF and translator now, and I'm wondering if it's normal for the air temperature to read constant 80 degrees farenheit. Every time it's been logged, it hasn't moved from 80 degrees.

 

[spoolamatic]

That is normal as the temp and baro are booth set at a constant level .This is because the gm unit doesn't need them to correctly meter the air .

 

[hystericfox]

That's all I needed to know. Thank you.

 

[slickster]

Does this not make the tune of the car fluctuate with with outside temp and pressure?

 

[tmizer]

I believe the output is temperature compensated, hence, fixed ambient temp/barom levels.

 

[slickster]

I see.
I had read somewhere that it wasnt, but i knew that didnt sound right.

 

[tmizer]

Search/read the DSM threads on Fullthrottletech.com for more information. Don't ask a question like this, it's too basic and that forum is nice and unlittered of newb posts. The Yahoo DSM-ECU Group is another good source, but it's got a clumsy interface that gets worse to navigate the more repeat questions get RE-posted again and again.

 

[slickster]

Don't ask a question like this, it's too basic and that forum is nice and unlittered of newb posts. .

I dont think the question was "What kind of oil do i need?" WTF People are allowed to have questions. If you don't want to reply because you believe it to be a "newb" post, then don't. These sites are supposed to be a source of info, not somebody saying im too advanced for this.
BTW- Thankx for the part of your response that was helpful.

 

[hystericfox]

Searching didn't show up anything that answered my question. If I thought it was a truly stupid question I would have posted it in the Newbie Forum. The reason I posted it in here was because it was related to a tuning tool (MAFT). Thanks for the advise though. Keep up the good work.

 

[tmizer]

I believe the output is temperature compensated, hence, fixed ambient temp/barom levels.

Search/read the DSM threads on Fullthrottletech.com for more information. Don't ask a question like this, it's too basic and that forum is nice and unlittered of newb posts...

Firstly, I answered the question of this topic.

Secondly, however, maybe it's sentence structure or a misplaced pronoun , but the third sentence above means: "I am imploring you (implied, general you, plural or singular) to not ask a basic question (this thread topic) at Fullthrottletech.com." Basic questions can be answered the quickest by searching, not asking. I'm not being an a**, if one searches "MAFT, temperature" at Fullthrottletech.com you'll find the answer.

Yes, I agree people on THIS "general" forum, should ask questions like this just like was done in this thread. All I'm asking (imploring) is that the more specialized forums, that I freely disclosed btw, be treated a bit differently otherwise they suffer the typical database bloat due to repeated questions, which slows down not just the website, but a user sifting thru endless threads on the same subject.

 

[psychlow]

Karman-Vortex (stock type) sensors require temperature sensors in addition to the vortex-sensor because they do not directly measure air density, they only measure air speed. The ECU runs a calculation with the temperature data and the air speed data to come up with an approximate airflow value.

The GM MAF sensor, on the other hand, measure's both temperature and flow with the same wire. Since that same signal varies based on air flow and air temperature, both variables are taken into account in the signal sent to the ECU.

 

[slickster]

Karman-Vortex (stock type) sensors require temperature sensors in addition to the vortex-sensor because they do not directly measure air density, they only measure air speed. The ECU runs a calculation with the temperature data and the air speed data to come up with an approximate airflow value.

The GM MAF sensor, on the other hand, measure's both temperature and flow with the same wire. Since that same signal varies based on air flow and air temperature, both variables are taken into account in the signal sent to the ECU.

Thank you.