Problem with MAF sensor Replacement - Page 2 - Mercedes-Benz Forum

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post #11 of 22 (permalink) Old 10-04-2008, 09:33 AM
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Quote:
Originally Posted by Americandreamer81 View Post
I ended just buying the cleaner for the MAF sensor and I cleaned it a few times, before putting it back in. When I put it back in, that's when all hell broke loose! The check engine light was off, but the car started to stuttering like it is going to cut off. I cut the car off and crank for about 3 more time and I had the same results. I even put the car in reverse and pressed the gas, but nothing happen. What the hell could be the reason for this? Can anyone out there please help me out here?
OK, disconnect the MAF sensor and start the engine without it, what happens? This may sound crazy but try it and let us know

ERIC.

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- George Bernard Shaw to Winston Churchill.

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post #12 of 22 (permalink) Old 10-04-2008, 10:20 PM
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Originally Posted by Kajtek1 View Post
I have to play devil's advocate here. I was very satisfy with ebay MAF what gave me 15% fuel savings, while some members reported that MAF from AutohausAz come factory defective.
Still, that would be a statistical anomaly. I've only seen one post about an autohausaz being bad and there were other issues with the car -- and maybe the poster, too. And I've seen only two posters (including you) that haven't had a problem with a replica MAF.

Quote:
Originally Posted by Americandreamer81 View Post
I ended just buying the cleaner for the MAF sensor and I cleaned it a few times, before putting it back in. When I put it back in, that's when all hell broke loose! The check engine light was off, but the car started to stuttering like it is going to cut off. I cut the car off and crank for about 3 more time and I had the same results. I even put the car in reverse and pressed the gas, but nothing happen. What the hell could be the reason for this? Can anyone out there please help me out here?
What exactly was the process and the product(s) you used to clean the MAF? If it is dirty, properly cleaning it won't hurt anything and may help, but if you have codes it doesn't often seem to do much good,either. If done improperly it can damage the MAF, too.

I like Eric's suggestion, you'll get a CEL but it should settle down.

Take care and enjoy the ride,
Greg

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post #13 of 22 (permalink) Old 10-04-2008, 11:08 PM
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Originally Posted by gregs210 View Post
Still, that would be a statistical anomaly. I've only seen one post about an autohausaz being bad and there were other issues with the car -- and maybe the poster, too. And I've seen only two posters (including you) that haven't had a problem with a replica MAF.

I don't really know what is replica and what not. From what I know the stuff sold by Autohaus and German Star are replicas. The MAF I bought on ebay was vacuum packed to the backing with Bosch logo printed all over on it. I even went into the trouble of removing the MAF and comparing it to OEM. They look like coming from the same mold, with the exception that ebay MAF had Bosch logo blanked on the mold.
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post #14 of 22 (permalink) Old 10-04-2008, 11:53 PM
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Originally Posted by Kajtek1 View Post
I don't really know what is replica and what not. From what I know the stuff sold by Autohaus and German Star are replicas. The MAF I bought on ebay was vacuum packed to the backing with Bosch logo printed all over on it. I even went into the trouble of removing the MAF and comparing it to OEM. They look like coming from the same mold, with the exception that ebay MAF had Bosch logo blanked on the mold.
Well, having purchased the MAF from Autohausaz, I know they don't sell just the insert. After the interchange with gw in the 163 forum, I pulled my insert from the assembly...and confirmed that the BOSCH logo is NOT blacked out...and that's how you can tell a replica. If you read GW's post you'll learn lots about replicas: they come packaged exactly as you describe, vacuum seal on the yellow and red Bosch cardboard backer, and the difference is indeed the chip, no BOSCH logo. I haven't heard of any replica assemblies, just the inserts themselves, so the odds are if you buy the whole assembly from a reputable source, you're much more likely to get the genuine Bosch part. That said, I think any of us would be happy with a replica that provided better mileage, at least so long as the leaned-out mixture doesn't smoke the cats or the O2 sensors. Only problem is that most of the replicas seem to be problematic in the other direction, they just don't work properly, period. (FWIW, after my stock MAF went out, I got better mileage than when it was "working properly" and after I replaced it, it went back down.)

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post #15 of 22 (permalink) Old 10-05-2008, 10:26 AM
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You may find that it would have been cheaper to just let the dealer do it in the first place...

Don't believe everything you think
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post #16 of 22 (permalink) Old 10-05-2008, 10:40 AM
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Originally Posted by eric242340 View Post
OK, disconnect the MAF sensor and start the engine without it, what happens? This may sound crazy but try it and let us know
Please try this and then we can help you better, we need to determine many things to help you move forward without spending money

ERIC.

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- George Bernard Shaw to Winston Churchill.

"Cannot possibly attend first night, will attend second ... if there is one."
- Winston Churchill, in response.
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post #17 of 22 (permalink) Old 01-02-2009, 10:07 AM
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Red face I'm new at this...

Any photos on replacing the maf?
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post #18 of 22 (permalink) Old 01-02-2009, 10:30 AM
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Mass flow sensor: Information from Answers.com

Don't believe everything you think
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post #19 of 22 (permalink) Old 01-02-2009, 01:04 PM
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Thanks!

Thanks for the link!
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post #20 of 22 (permalink) Old 01-02-2009, 04:07 PM
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Sheesh.

Nice generic info, but here's what to look for on late-model benz:
http://www.benzworld.org/forums/w210...-cleaning.html

Normnpat, please remember when posting to SPECIFY your make and model.

Take care and enjoy the ride,
Greg

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