car only getting to 6psi...

**RossA4** · 05-26-2008 04:15 PM

i dont get it... i put in a fresh tank of 93 and my car hits 10psi... i turn it off when i get home... go out this morning and only hits 6.. this has been happening for a while now. any ideas?

mods...
k&n
2.5 inch turbo back
boost gauge
turbo is stock
01 QTM

**AudiRacerS4** · 05-26-2008 04:17 PM

limp mode?

**andyrew** · 05-26-2008 06:59 PM

and what are you using to up the boost??

6-7psi is stock.

Colder temperatures the car will boost lower because of the denser air. But it will still make the same HP.

did it feel slower at 6psi?

GL

**tdn** · 05-26-2008 07:06 PM

Andyrew, an awm is set to hit 10-11psi stock.

check engine light on? regardless, check for codes. most local part stores (autozone, napa, advance) will do it for free.

**andyrew** · 05-26-2008 10:26 PM

Didnt notice he was 01,

My bad!

**maxspeed** · 05-26-2008 10:40 PM

<to the jaws theme>
BAD MAF....
BOOST LEAK...
BAD MAF...
BOOST LEAK...

**solowb5** · 05-27-2008 06:53 AM

If it's a bad maf then unplug it.

**t1demont1** · 05-27-2008 07:13 AM

If it's a boost leak then fix it

**UN-PIMP-Z-A4** · 05-27-2008 08:55 PM

lol

**RossA4** · 05-28-2008 05:57 PM

sorry guys ive been away from my pc the last few days...

the car is still doing the same thing.. the check engine light is on for my cat (which is gone cuase of the exhaust i have) and Secondary air injection system.

the car definitely feels slower. at 6psi then 10.

so check the maf and do a boost leak test?

how will i know if its the maf?

**tdn** · 05-29-2008 08:52 AM

If you disconnect the MAF and your car runs much better than, you need a new MAF. You can also log your MAF if you've got VAG.

Did you get your codes read again? Because even if you check engine light was already on, more codes can show up and you won't realize it because your engine light is on. Your MAF will usually throw a code. Which is why you should either, take care of whatever problem causes your check engine light so that it goes away, or check your codes on a regular basis so you know when new codes pop up.

Do some searching, you can get rid of the code related to your cat and probably your SAI which I know little about.

**RossA4** · 05-29-2008 09:19 AM

thanks man... ill go look at the codes...

**tdn** · 05-29-2008 10:05 AM

by the way, a lot of people (including dealerships) claim that their k&n filter destroyed their MAF with the oil required on the filter. I hear the best way, is to apply a light coating and to let it sit out and dry for a day before putting it back on your car.. you may want to take this into consideration before installing a new mass air flow sensor if it turns out to be your problem.