Stock air box. An i flashed my Porsche over 4 years ago with a upsolute. So yes. That bad? But theres no more cel now

 

ANd I bet it got colder thus the maf issues... = Upsolute

 

Amazing MARKSKI, just amazing! You really know your crap!

 

have the same problem, psm abs errors all the time

 

Get a MAF. The car is rich witha bad MAF, You will blow your cats if you ignore it.

 

I could be wrong, but don't Maf's have a set resistance value. Could he simply check the resistance and see if it is with in tolerance? If it is then move on to something else, if it is not in tolerance then replace the maf.

 

But i didnt have a problem with until 4 years later. Could that be markski? So is it my Ecu or maf?

 

This might help... found this in another thread.

" Hot-film MAF sensors use a centrally-heated film element. These sensors function on the electrical principle that resistance increases with temperature. As intake air moves past the film, the cooling effect causes a measurable drop in resistance, and thus lower voltage is required to maintain the prescribed temperature. The MAF control unit is sent a reference voltage of 5V, and returns around .4V to.5V at idle and from 4.5V to 5V at full throttle. Based on a fixed data set, an accurate assumption of air mass is made. This information is sent to the ECU for appropriate adjustments to timing and AFR."

 

Found this from 07 I think.

"here is the technical answer...
The stock MAF makes it's peak voltage at 1400 kgs/hr, or 51.33
lbs/min, and at 10hp/lb/min, that's 513hp max. But those engine's don't
make that efficiency, so maybe 490 or so hp, they're pegged.
Now, the input voltage is 12v, so the thing keeps making more output
voltage, but the ecu has a diode clamp on it to keep it from exceeding that
voltage, so the thing just keeps drawing more and more current till it pops."

 

I know this is not for a p-car, but same concept. I was doing some reading and it reminded me of my turbo Z. The 300zxtt maf is only good to 485hp, after that you simply split the intake i.e.(one side gets stock maf and other side gets no maf) hence the car gets the air it need but it thinks it only has 485 hp.


http://www.jimwolftechnology.com/cus....asp?PartID=44

 

i changed it 3 times. still same thing...

 

Steve,

Do you get the psm, and abs under full throttle? Mine is fine unless i hit it and get over 5k and a bar boost. still seems slugish from a start to tho.

 

i get it when i slow down to stop only. never when boosting it

 

Are you still receiving the same warning lights today? I only ask because it is nearly 80 degrees in Dallas today.