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Oilline
Silverstone


Joined: 20 Jun 2009
Posts: 113
Location: Skipton, North Yorkshire


PostPosted: Sun Sep 24, 2017 8:42 am    Post subject: Counterfeit or faulty MAF Reply with quote

So 2 years ago I had a trip to Wayne Schofield for a session on the rollers. The session was cut short as the power was way down as in 200 hp at the flywheel. This indicated there was an underlying problem and not worth trying to re map.
Since then I replaced all the ignition components, got the variorum working correctly, 100 cel cat, KN air filter . It was suggested that the cam timing may of slipped but I wasn't convinced. And as it's an engine out job to check and set I wanted that to be the last resort.
Somebody then mentioned the MAF sensor so I thought I'd give it a go.
After a bit of Ebaying I found a genuine Porsche part at £400 ish, using the Bosche part number found the same sensor for £178, or aftermarket at about £70 !
So I went for the " genuine" Bosche part for £170 not wanting to risk a cheap aftermarket part.
Car felt immediately better, so back to Chipwizards for a power run.
Good news and bad. Power was up to 240 bhp but was displaying a MAF sensor fault. Wayne disconnected the MAF and power went UP to 260 bho !
So we came to the conclusion my original MAF was faulty, and the replacement I got off EBay was also faulty or more likely a counterfeit part .
Wayne said counterfeit parts are becoming a big problem. So I ordered off the Bosche part number at my local trusted auto electricians who are Bosche dealers. £193 so not so bad compared to Porsche price. The part and the packaging looked identical apart from the Bosche dealer supplied part had a Bosche hologram seal on the box.
So back to Chipwizards again , no MAF fault and power back where it should be.
So beware of supposedly Genuine parts on EBay at bargain prices.
 
  
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AP90
Spa-Francorchamps


Joined: 25 Sep 2004
Posts: 290
Location: Cornwall UK


PostPosted: Sun Sep 24, 2017 10:36 am    Post subject: Reply with quote

Thanks for an interesting and informative post, sometimes you have to buy from a reliable source, did you get the cash back on the "Bosch" part?
 
  
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Oilline
Silverstone


Joined: 20 Jun 2009
Posts: 113
Location: Skipton, North Yorkshire


PostPosted: Sun Sep 24, 2017 10:52 am    Post subject: Reply with quote

It's going through the normal EBay returns procedure. The seller sent me a returns envelope and he has it back but so far no refund. I don't think there will be a problem though .
 
  
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Endoman
Imola


Joined: 11 Apr 2011
Posts: 815
Location: Bolton U.K.


PostPosted: Sun Sep 24, 2017 12:51 pm    Post subject: Reply with quote

Go back to a paper filter the K&N have had reported problems contaminating the wire with oil.
_________________
Porsche 944 S2 Coupe Guards Red
Porsche 993 Coupe 9m RS Replica
 
  
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infrasilver
Fast & Furious
Fast & Furious


Joined: 04 Oct 2010
Posts: 7074
Location: East Midlands

2001 Porsche 996 Targa

PostPosted: Sun Sep 24, 2017 5:46 pm    Post subject: Reply with quote

A friend had exactly the same issue with his Audi's MAF, bought a cheap one that he thought was genuine and the issue wasn't cured, thinking is was not his MAF at fault he spent a lot of time trying to diagnose until he took it somewhere that told him it was the MAF at fault, he went to the main dealer to buy a genuine one for double the price and this cured his running issues, lesson learnt for him.
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http://euroroadtripper.blogspot.co.uk/

 
  
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jotaking
Spa-Francorchamps


Joined: 01 Jun 2012
Posts: 326



PostPosted: Tue Sep 26, 2017 1:40 pm    Post subject: Reply with quote

No wonder it was counterfeit...Bosche!

Is this a collaboration for Porsche/Bosch?

Don't buy any Posch parts either, they'll be from the same factory!!

Thanks for the heads up...

In my experience, Ebay is cheap for all the wrong reasons!!
 
  
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wasz
Kyalami


Joined: 28 Dec 2012
Posts: 1753


1999 Porsche 996 Carrera 2

PostPosted: Tue Sep 26, 2017 2:25 pm    Post subject: Reply with quote

You guys are paying way too much for your fake Bosch MAFs.

£12 delivered here (996):
https://www.aliexpress.com/item/MAF-MASS-AIR-FLOW-SENSOR-METER-FOR-PORSCHE-911-BOXSTER-2-5-2-7-3-2/32475752216.html


Best to use trusted suppliers, holograms or no holograms.
 
  
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Oilline
Silverstone


Joined: 20 Jun 2009
Posts: 113
Location: Skipton, North Yorkshire


PostPosted: Tue Sep 26, 2017 5:18 pm    Post subject: Reply with quote

At least they're not claiming to be genuine Bosche unlike this seller
http://www.ebay.co.uk/itm/0280217803-BOSCH-HOT-FILM-AIR-MASS-METER-MASS-AIR-FLOW-MAF-BRAND-NEW-GENUINE/152111154329?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2748.l2649
 
  
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wozy
Imola


Joined: 06 Feb 2013
Posts: 779
Location: Worcestershire


PostPosted: Tue Sep 26, 2017 6:00 pm    Post subject: Reply with quote

I make furniture for a living. I made this fellas kitchen, he made his living importing car parts into the Middle East. He'd come across dodgy Chinese parts more and more over the years bought as OE and they were easy to see through.

However he had a whole lot of issues with Bosch parts failing that he finally found out were not legit only when they were sent back to Bosch for confirmation. They were such a good copy including the packaging that he couldn't believe they were fake.., we are talking multi container loads of the stuff.

The bizzarre thing was and part the reason behind why he was so surprised the parts were not original was because the ships last port of call before they got to him was Germany. Crafty, as it made it seem like the goods had come direct from country of origin.
_________________
Porsche Cars of Great Britain launched the 993 in the UK in early December 1993 registering 12 x UK cars on the 6th & 7th of that month; mine is one of them.

993 C2. MBM. C4 mounts, RSRs, RS Short shifter. RS steering wheel. FSDs & M033s
Previous 2.7S, 3.2, 964 and 968CS
 
  
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