Cel First Time Out Of Sorage

[Franco]

HI Guys, Filled up with new gas today and I erased cel light, drove around and 110 KMS later cel shows up again. Tried unplugging MAF and cel didn't clear so went and get some cleaner, cleaned it and nothing changed, plugged up OBD2 and P1123 code only. I noticed no difference in the idling when unplugging the maf .


I did notice a strange sound which i could only hear with the windows closed and at a stop, and didn't get louder when picking up speed but was faded out by the engine noise, sounded like a bearing starting to go bad or a vacuum hose trying to suck up water, don't know if this pertains to the maf but just thought i should mention it.

Any thoughts guys?????????????????????????????????

Thanks

[MNBoxster]

Hi,

Interesting.... Porsche has a TSB out 9/00 1715 1 noting the Oil Filler Hose between the Crankcase and the Service Unit (Oil Filler in Trunk).

It says: "Oil Filler Hose can crack causing the following conditions:

• Check Engine Light
  
  Oil Leak on the Crankcase in the area of the Oil Filler Hose
  
  Rough running (rough idling, increased idle speed)
  
  As a result of the incoming secondary air, the following Fault Codes may be stored in the DME Fault Memory: P1123 to P1130.
  
  A new style hose was installed in Production as of August 18, 2000. In case of complaints, the new style Hose should be installed. PN# 996.107.254.03"

Sounds similar to what you're experiencing, especially with the sound you describe. Check the Crankcase for tell-tale signs, and if confirmed, send me a PM w/ your email Addy and I'll shoot you a copy of the TSB w/ replacement procedure.

There is also a TSB discussing P1123 and noting the proper voltage range of the MAF. It says:

• MAF signal voltage:
  
  - If the value is between 0.92 V and 1.08 V, no replacement is necessary.
  - If the value is 1.15 V or above, replace MAF.

Run a test using a Multimeter and see what value it gives you. Hope this helps...

Happy Motoring!... Jim'99

[blinkwatt]

I had P1123 & 1125 once,it was a bad MAF. $220(I think) shipped for a new non E-gas MAF from 986online.com .

[Franco]

Originally Posted by MNBoxster

Hi,

Interesting.... Porsche has a TSB out 9/00 1715 1 noting the Oil Filler Hose between the Crankcase and the Service Unit (Oil Filler in Trunk).

It says: "Oil Filler Hose can crack causing the following conditions:

• Check Engine Light
  
  Oil Leak on the Crankcase in the area of the Oil Filler Hose
  
  Rough running (rough idling, increased idle speed)
  
  As a result of the incoming secondary air, the following Fault Codes may be stored in the DME Fault Memory: P1123 to P1130.
  
  A new style hose was installed in Production as of August 18, 2000. In case of complaints, the new style Hose should be installed. PN# 996.107.254.03"

Sounds similar to what you're experiencing, especially with the sound you describe. Check the Crankcase for tell-tale signs, and if confirmed, send me a PM w/ your email Addy and I'll shoot you a copy of the TSB w/ replacement procedure.

There is also a TSB discussing P1123 and noting the proper voltage range of the MAF. It says:

• MAF signal voltage:
  
  - If the value is between 0.92 V and 1.08 V, no replacement is necessary.
  - If the value is 1.15 V or above, replace MAF.

Run a test using a Multimeter and see what value it gives you. Hope this helps...

Happy Motoring!... Jim'99

Hi Jim, I'm trying to send you a PM but your inbox is full.

Thanks Franco

[Franco]

Hi

Update, I tightened the flange connecting the oil fill tube to the crankcase but the noise didn't disappear. there are no leaks anywhere else so that's covered.

I verified the MAF and i got a reading of 1.28 volts so i guess I'll be shopping for a new sensor this week. One thing at a time i guess.
Jim thanks for all the information you have PM'D me, i really appreciate all the time you took to help me on this subject.
Guys like you are indispensable on forums like this, MUCH RESPECT

[Franco]

Hi guys, Update

I received the new MAF today, installed it and took a reading.

1.24 - 1.3 volts

The value isn't between 0.92V and 1.08 V, it's more in the range of the old one 1.28V
Waiting for the new MAF to arrive i had cleaned the old MAF and cleared the CEL and after driving 300K it had not come back on and the cycle was all done.

New MAF $196.00 delivered in the USA.

Thanks

[fab]

Where did you buy your MAF?

[FrayAdjacent]

Originally Posted by fab

Where did you buy your MAF?

Yeah? Where did you get it? That's the lowest price I've seen it anywhere. I'm sure we'd all love to know, just in case!