maydew

iTrader: (9)

hi all,wondering if any one can shed some light,this afternoon i had a cel come on,checked the psi3 and it kicked up a "Mass Air Flow Sensor Circuit High Input " fault po103. this came on at 7200 rpm so pulled over reset the the code light went out,drive a few mile to allow the ecu to learn,tried it again on on the second time hitting 7200rpm came bk on, done the reset again drove it under 7k after 25-30 miles no cel .

the car is a 2003 sti mapped to 1.55 bar on a td05 20g standard internals running K&N short Ram enclosed impreza induction kit ,when paul@zens mapped the car he did say the maf was running at 99% at 7k. would this recent cold blast cause this cel to come on or some other fault cheers

Jolly Green Monster

iTrader: (4)

yes..

what grams is the maf reaching?

Simon

maydew

iTrader: (9)

cheers for the reply ,didnt clock it mate :-( just reset the ecu and on the second time hit 7200 it came up again so bk off and drove normal just incase the was a fault or just the cold, is there a fix for this ie different maf housing or different maf etc etc,the maf was new 3 months ago,grateful for any help mate

BIG FUD

iTrader: (84)

gm 3 barr maff sensor i recon .....

STiFreak

iTrader: (4)

Don't think a 3 bar map sensor is going to help his maf hitting it's max voltage. It's probably the cold (more dense air). As Simon asked, what grams airflow and what maf voltage are you seeing?

maydew

iTrader: (9)

tried it again today first time was in 3rd no cel maf reading was 236. (something?) @ 7200rpm

hit 4th and .............
and cel came on
4th gear
7135 rpm
out side temp 5°C
intake temp 14°C
maf air flow reading taken on psi3 292. (something?) as the cel came on, brought the same fault code up po103 any suggestions would be gratefull

i dont make it a regular thing of reving it so high normally change gear about 6800 ish but would like to know if there is a fix

Pavlo

The fix will likely take the form of a trip to wellingborough and a cup of tea.

maydew

iTrader: (9)

any idea whats involved mate

maydew

iTrader: (9)

i will give u a call in the morning mate bout 11 ish

STiFreak

iTrader: (4)

292.74 g/s is usually 4.69v on stock maf scalings I've seen. You should be able to extend the maf scale out easily. Quick job for Paul or Simon I'm sure.

dynamix

iTrader: (3)

a bigger maf housing will extend it and still keep the readings real. MAF scaling will work though but will skew the figures that you get out of PSI3 but it depends on what you look at in there as to whether that is an issue.