Replaced MAF, still errors.....

[jhandy]

well start with the misfire code.

the easiest way to tell if it is the coil pack is to take number three off and swap it to another cylinder.

clear the codes, and then run the car. cel should pick it up again, and this time the code will pick it up at the new location.
If it still says number three, then it is not the coil pack causing the misfire.

it will get really expensive if you start replaceing parts without diagnosing first.

the maf could have been worked out if you would have unpluged the maf and drove the car. Still driving bad, then not the maf.

the other codes are....B codes are body codes, and C codes are chassis codes. I will look around for my book to see if we cant find out what they mean.

[sparker]

Appreciate the response - thanks.

I will try swapping the coil around to see if I can single out the problem tonight.

The MAF was tested (car did seem to idle and drive acceptably without MAF plugged in, so perhaps it was bad as well?)

Also appreciate you looking up those other codes, I'm curious to hear what they are. Seems strange!

Sam

[jhandy]

B0407, Air Flow Control # 2 - heater - low signal input


it would help if I had your model year, CC displacement to find C code.

[sparker]

Ok thanks, what exactly does that mean? Something wrong with the heater?

Car is a 1997 2.5l base model.

Cheers,
Sam

[jhandy]

The C code is going to be a little harder to crack. Someone here that has a Porsche OBD service manual that can look it up.
But basically it is a error with something that gets input from the chassis. In my limited experience it is commonly the ABS system.
with the boxster, it does not have traction control, no roll sensor, manual trans. there really not many other choices aside from temp sensors, and speed sensors.

Also it could be a non USA code, in which case, the Piwis manual will tell us the code.
Porsche tech guys usually gaurd this book like it is the bible and it is not easily had.

[jhandy]

I have no idea what it means. - just a wild guess- A air flow selector thingy motor or sensor in the heating/AC system is failing or has failed.

But i can tell you that it is a DTC (diagnostic trouble code) , these codes can be one time things. The car could be having a bad day....I would find the answer to the P code, and then clear all codes. Wait to see if it comes back.

I think that your C code may be a Euro/Asia spec code. I can not find it in any of my books.

[sparker]

Really appreicate your response, I too hope it was a one time code!!!

Will get onto that coil pack tonight and see if I can make that code jump numbers (or even better - vanish...) I can only hope its something as basic as a dead coil or even a coil not plugged in correctly.

Sam