CEL codes P1128 & P1130

[maytag]

Originally Posted by blue62

You don't specify the year of your car.
I think Porsche used the hot film type MAF up to 1999
In 2000 they went to the wire type MAF.
)
Bosch developed the wire type MAF so I go with Bosch for the Wire MAF.
Not sure if they developed the hot film type, and I don't have a car running that type.
So I have done no research on that type MAF other then how they work.

As a rule of thumb when it comes to sensors I try to find out who developed them.
I try to stay away from copy cat sensors.

But in the end do your testing to make sure your MAF is your problem.
The Porsche MAF is a Bosch even has the same parts numbers I hear.

Thanks for the thoughtful reply.
The car is an '03 S. I just installed a motor from an '04 S. Had an odd "flat spot", put the factory tune back in, same thing.
Unplugged the MAF, problem went away.

??

Sent from my SM-G970U using Tapatalk

[blue62]

Originally Posted by maytag

Thanks for the thoughtful reply.
The car is an '03 S. I just installed a motor from an '04 S. Had an odd "flat spot", put the factory tune back in, same thing.
Unplugged the MAF, problem went away.

??

Sent from my SM-G970U using Tapatalk

Unplugging the MAF on a Porsche seems to work as a test of the MAF for the Porsche.
I did that to test a friends Ford pickup. Truck would not even start with the MAF unplugged.

Your 03 S should have the wire type. They can be tested with a multimeter but I don't know the values. I do know they are more sensitive then lots of people realize.
You can mess them up just by touching the wire with your fingers new from the box.

You could go to YouTube and look for testing methods of MAF sensors.
If you want to be more confident it is the MAF before replacing it.
Scannerdanner is very good and has tons of info on diagnostics.
he will have numerous videos on MAF sensor related issues.

[Steelepuls]

Cleared CEL and monitors. Finally passed smog today. :dance:

Found a post here to check the oil cap so I rechecked my oil cap and found small cracks in the o-ring, my fuel cap also had some small cracks as well. Since I was online, I ordered new ones and installed. Low and behold, the car runs great with no CEL for about 200 miles. All monitors were clear and it passed the smog with no problems. Now I can get my tags and be legal again.

Not sure if I got lucky or if the small cracks in the o-rings may have contributed to vacuum leaks in the crankcase. I’m just relieved that the smog passed and I just need to wait for the tags in the mail.

Thanks all for the advice and support.