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Is the Hitachi MAF sensor better than the Bosch?

Dus10R

By Dus10R
in 996 TT, 996 TT S, 996 GT2

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Dus10R Member

Dus10R

Posted
Posted

I see that some tuners are switching over to a Hitachi MAF sensor with thier tuning kits, are these better than the Bosch OEM units? I see where you can even buy a special tube that allows the Hitachi unit to fit "The Mode air intake tube is designed for the Prosche 996TT's needing to run a Hitachi Mass Air Flow Sensor. An opening has been made in the intake tube that allows the fitment of the Hitachi MAF sensor."

I've been having problems upon just starting the engine, especially on hot days, with the idle jumping up and down and sometime it will die. This only happens right when you start it and let it idle for a bit; after it's warmed up or driven a bit it doesn't do it.

I checked for codes and there are none, except one time, right when I started it I got a 115 Hot film MAF sensor code, which has led me to believe that the MAF may be the cause of my idling issue.

Anybody else use the Hitachi unit?

wross996TT Member

wross996TT

Posted
Posted

you will need your ECU altered to use the Hitachi MAF...it is not plug and play...Do you have an aftermarket intake or filter? Any ECU flash? It is better to understand why the MAF is giving a false signal than to just implement potential solutions without understanding the fault. Others have cleaned the MAF to some reported benefit.

Dus10R Member

Dus10R

Posted
  • Author
Posted
you will need your ECU altered to use the Hitachi MAF...it is not plug and play...Do you have an aftermarket intake or filter? Any ECU flash? It is better to understand why the MAF is giving a false signal than to just implement potential solutions without understanding the fault. Others have cleaned the MAF to some reported benefit.

Stock intake but using a K&N which potentialy could have been over oiled. So I plan on cleaning the MAF and the throttle-body and then will take it from there. It just seems to me that I read about a bunch of MAF issues with the stock Bosch units and the tuners are switching to the Hitachi types which they claim are more robust. So these are not plug and play, they don't output a digital signal like the Bosch units do?

wross996TT Member

wross996TT

Posted
Posted
So these are not plug and play, they don't output a digital signal like the Bosch units do?

correct..they do output a voltage, just not the normal output voltage.

  • 4 years later...
  • Moderators
JFP in PA Member

JFP in PA

Posted
  • Moderators
Posted

Hi Men,

What is the part number of the hitachi maf u are using ?

Cheers

You do realize that you are asking a question on a thread that has been dormant for 4 years................

wross996TT Member

wross996TT

Posted
Posted

Hi Men,

What is the part number of the hitachi maf u are using ?

Cheers

You do realize that you are asking a question on a thread that has been dormant for 4 years................

He has asked it in at least three forums on 5 threads...LOL

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