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MAF Connections

skertchly
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skertchly Member

skertchly

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I just bought my 2001 Boxster a couple of months ago. It spent the first month(!) with a mechanic, who tried to find out why it was running so rough when cold. He ended up just messing it up more, so I took it out of there. He obviously had no idea what he was doing. Needless to say, I didn't end up in good terms with that shop, especially after having to pay a bill for nothing.

After searching through these forums for similar symptoms, my best bet was to look at the MAF. To my surprise, the mechanic replaced the MAF with another one that wasn't even meant for a Porsche. My guess is the harness for the MAF didn't fit this replacement, so he just cut it off and connected the wires directly. I already ordered a new MAF but I need to know the correct way to wire it when it arrives. Does anyone have photos, a schematic, or color code that can help?

Thanks!

Kenneth

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skertchly Member

skertchly

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Is this a US /Canada Boxster or RoW version?

I'm not sure, how can I find out?

I disconnected the weird MAF they left in, and although the car feels a little bit slower, it definitely made a difference with the roughness while running cold. Also, there's almost no hesitation anymore when accelerating from low RPM.

I've been running the car like this for about 100 miles. According to the forums, the CEL should have turned on by now. Does this indicate a RoW version?

Thanks,

Kenneth

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skertchly Member

skertchly

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"harness for the MAF didn't fit this replacement, so he just cut it off and connected the wires directly"

Yikes! And you paid this clown? I'd go after him for damaging my car...

Not only that but he made a small rip in one of the seats, among other "fixes"...It's an awkward situation because the guy is a friend of my dad, so I can't really go after him. Learned my lesson though <_<

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skertchly Member

skertchly

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Ok so I disconnected the battery, connected the new MAF according to Loren's schematic, and reconnected the battery 5 minutes later. I've driven the car for a week now and it feels worse than when the MAF was not connected. If the engine is cold and I press hard on the accelerator, the engine stalls and almost turns off. Additionaly, most of the times I do this I hear backfiring. I disconnected the MAF and everything works fine again. How can I fix this? I have the Durametric cable, is there a specific measurement I should check? Is it a good idea to be driving without a MAF?

Thanks in advance,

Kenneth

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Loren Member

Loren

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If there are no fault codes without the MAF then something is wrong. A missing MAF will generate a fault code (usually a P0101 or P0102) after a few minutes of running.

986-606-125-01 can only be used on cars with an updated DME program. Has your car been updated?

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skertchly Member

skertchly

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If there are no fault codes without the MAF then something is wrong. A missing MAF will generate a fault code (usually a P0101 or P0102) after a few minutes of running.

986-606-125-01 can only be used on cars with an updated DME program. Has your car been updated?

I'm not sure if it has been updated...from what I understood by looking at Mike Focke's MAF guide, I thought that since my Boxster is a 2001, it would already have the latest DME. Am I wrong? Is there a way to check the DME version using the durametric cable?

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skertchly Member

skertchly

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It's not the DME it is the program version in the DME.

Any way of knowing what was in there previously? If not, you had best find a shop with a PST2 or PIWIS to do the firmware upgrade. Or... try the older MAF.

I don't think I'll be able to find a shop with that equipment where I live...I guess I'm going to have to break down and take it to the dealer. The closest one is about 120 miles away and I won't have time to go this month. Am I taking any risks if I drive with the MAF disconnected until then? What kind of costs should I expect for fixing this?

Thanks,

Kenneth

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whall Member

whall

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Kenneth,

I suggest you PM "Frissen", on: http://pedrosboard.com/

He would be an excellent source of information concerning maintenance support in Central Mexico. And, assuming that the dealer that is 110 miles away from you is the Mexico City daaler, that would be right in Frissen's ball park.

Bill

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skertchly Member

skertchly

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You will lose power at revs above 4000 RPM and get a fault code.

Keep it under 4000 RPM and you should be fine.

No good independent Porsche shops closer?

Is the power loss after 4000RPM very noticeable? When I drove it with the MAF disconnected, I didn't notice that much of a difference...or could it be that I've never really felt what it's supposed to feel like?

With the number of Porsches in Mexico, I would be surprised if an independent shop even exists.

Is there anything else I can test before I give up and take it to the dealer? Maybe the oxygen sensors?

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skertchly Member

skertchly

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Kenneth,

I suggest you PM "Frissen", on: http://pedrosboard.com/

He would be an excellent source of information concerning maintenance support in Central Mexico. And, assuming that the dealer that is 110 miles away from you is the Mexico City daaler, that would be right in Frissen's ball park.

Bill

Thanks for the info! If I'm not able to fix it myself, I'll definitely contact him.

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