High MAF readings.
09-28-2010 | 05:02 AM
#1
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High MAF readings.
Hi all,
I have over the last couple years proverbially grazed this forum, whilst being a very proactive member of the UK forum. Although I now have a slight problem, which Im hoping the slightly more experienced members here may be able to help me with.
As in the UK I seem to be drawing a bit of a blank, so here it goes, and try not to flame me (too hard) if its something obviously stupid
:P
Right well, I have installed an AEM CAI and a Borla catback. I recently bought the Greddy Touch Informeter.
After installing the informeter I began to take reading for my MAF airflow sensor, and have consistently getting figures of 250-260 g/s under WOT and peak values of 272 g/s. Max revs hit during these tests were C. 9200 (slightly late shift).
I have considered cleaning the sensor, if this will help? Although cant do so until I get back to the UK (end of October)
Any help on the matter will be greatly appreciated.....
Nick
I have over the last couple years proverbially grazed this forum, whilst being a very proactive member of the UK forum. Although I now have a slight problem, which Im hoping the slightly more experienced members here may be able to help me with.
As in the UK I seem to be drawing a bit of a blank, so here it goes, and try not to flame me (too hard) if its something obviously stupid
:PRight well, I have installed an AEM CAI and a Borla catback. I recently bought the Greddy Touch Informeter.
After installing the informeter I began to take reading for my MAF airflow sensor, and have consistently getting figures of 250-260 g/s under WOT and peak values of 272 g/s. Max revs hit during these tests were C. 9200 (slightly late shift).
I have considered cleaning the sensor, if this will help? Although cant do so until I get back to the UK (end of October)
Any help on the matter will be greatly appreciated.....
Nick
09-28-2010 | 05:08 AM
#2
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From: Buddhist Monastery, High Himalaya Mtns. of Tibet
Yes, cleaning the MAF, as long as your gentile, would be a good start. My first thought was the MAF tube may have been resized, but since you have a AEM intake, that shouldn't be a problem. Have you checked for air leaks at the connectors, especially after the MAF?
09-28-2010 | 06:05 AM
#3
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From: Caput Mundi
It's strange to see this kind of information lacking in the UK, the english members i know are all pretty cool 
Anyway do what Al suggested and see what happens. Those numbers are pretty high for a NA car that is basically stock.
Anyway do what Al suggested and see what happens. Those numbers are pretty high for a NA car that is basically stock.
09-28-2010 | 07:29 AM
#4
maybe zoom can hijack www.rx8club.co.uk and have it auto route to this one:P
09-28-2010 | 11:22 AM
#5
What is a good G/S reading?? Ive seen this on my dashhawk too and wasnt sure what a 'good' maf g/s is??
I have the V2 intake and mine are around 210-220, sound about right?
I have the V2 intake and mine are around 210-220, sound about right?
09-28-2010 | 01:01 PM
#6
Try swapping sensors with someone else - that reading does seem higher than it should be .
09-29-2010 | 03:03 AM
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Well on th uk forum, the comments generally are:
- Its the AEM's fault.
- The MAF is screwed and needs replacing
- The Greddy is inaccurate....
I noticed there was quite a bit of crap on the maf when I took it out and gently cleaned the temp sensor, although I had nothing to hand to actually clean it internally.
Is it likely though, that a dirty sensor could cause an over reading? As I would have thought due to restrictions it would have under read if at all?
- Its the AEM's fault.
- The MAF is screwed and needs replacing
- The Greddy is inaccurate....
I noticed there was quite a bit of crap on the maf when I took it out and gently cleaned the temp sensor, although I had nothing to hand to actually clean it internally.
Is it likely though, that a dirty sensor could cause an over reading? As I would have thought due to restrictions it would have under read if at all?
09-29-2010 | 03:12 AM
#8
Yes it can cause a false reading. The entire sensor isn't exposed or could be partially blocked. This in turn will give it a false reading. The other thing people have a lot of problems with is the screen. Why people throw away little parts like this I will never know. Another place these installs can go wrong is that an engine is a dirty place. That crap can get into clamps, connections, and seals. If you don't put the parts on cleanly, ensure a perfect seal so there are no vacuum leaks, and put original parts on that are important you can have issues.
on a side note MAF sensors fail, and so do gauges. Its why they have to be calibrated from time to time or replaced. Cleaned, calibrated, and sometimes they just get thrown off between the factory and you.
on a side note MAF sensors fail, and so do gauges. Its why they have to be calibrated from time to time or replaced. Cleaned, calibrated, and sometimes they just get thrown off between the factory and you.
09-29-2010 | 11:44 AM
#10
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From: portland oregon
- The Greddy isn't "inaccurate" as its just pulling the OBDii info. just displaying the same information the PCM is getting from the MAF. so forget that.
- The MAF could be screwed but its likely that the coated temp sensor had something to do with your higher than expected GPS readings.
- Its not the "fault" of the AEM. Its very well made and a good replacement for the stock intake you should see higher than stock GPS with it installed.
You dont have readings from before the installl of the AEM so its difficult to say when the strange readings started to occur. Have you had any CELs related to AFR either MAF or O2 sensor CELs ? What are your Long Term and Short Term fuel trims?
07-21-2021 | 11:56 PM
#11
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So I have both high and low readings from my codes on the MAF sensor anlong with P0113 Intake air temp circuit high input and P1688 Powertrain and P0076 Powertrain, Intake Valve Control solenoid circuit low bank 1
I just fixed the issues in the engine and its running great but all the powertrain issues have it in a limp mode, can anyone help with advice, I did already replace the MAF sensor, and I replaced one of the O2 sensors, got the other but couldnt break it loose but the code no longer shows for that, was wondering if the Catalytic converters could be the problems
I just fixed the issues in the engine and its running great but all the powertrain issues have it in a limp mode, can anyone help with advice, I did already replace the MAF sensor, and I replaced one of the O2 sensors, got the other but couldnt break it loose but the code no longer shows for that, was wondering if the Catalytic converters could be the problems
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