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Easy way to test MAF / MAS / AMS Easy way to test MAF / MAS / AMS
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  #1  
Old 06-23-2007, 12:01 PM
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JimF, do I read correctly that your MAF issue wasn't triggering a CEL? I ask because my CEL is not illuminated either, yet it would appear the MAF is faulty. I guess I'm just surprised the MAF can be bad with no CEL illuminated.
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  #2  
Old 06-23-2007, 04:50 PM
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Did you just pierce the wires to take readings?
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Old 06-23-2007, 08:45 PM
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Quote:
Originally Posted by xvvvz View Post
Did you just pierce the wires to take readings?
Yes, using sharp probes.
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  #4  
Old 06-23-2007, 04:51 PM
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Quote:
Originally Posted by gmercoleza View Post
JimF, do I read correctly that your MAF issue wasn't triggering a CEL? I ask because my CEL is not illuminated either, yet it would appear the MAF is faulty. I guess I'm just surprised the MAF can be bad with no CEL illuminated.
No CEL . . but the car was not running as it should. As you read the 'contamination' was due to silicone . . .AND . . K&N oil and both were coating the IAT sensor.

I will be interested in your readings from the new MAF. Look forward to your posting of the measurements esp the ignition on . . of "1.00V +/- 0.02".
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Old 06-23-2007, 08:47 PM
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Originally Posted by JimF View Post
No CEL . . but the car was not running as it should. As you read the 'contamination' was due to silicone . . .AND . . K&N oil and both were coating the IAT sensor.

I will be interested in your readings from the new MAF. Look forward to your posting of the measurements esp the ignition on . . of "1.00V +/- 0.02".
No worries - I will probably be ordering it next week and will probably install and take the readings the week after. Normally I would run out and do it ASAP, but I am extremely swamped with household tasks this weekend and have several other cars to drive in the meantime. I will report back.
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91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280
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  #6  
Old 06-24-2007, 10:22 AM
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is there a MAF in M103/W124?

Thanks!
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  #7  
Old 06-24-2007, 01:45 PM
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I was under impression E320 had Bosch AMS. The procedure in the article is for Pierburg Hot Film sensor. Are you sure it is applicable?
Mike

Here is info for Bosch sensors. I saved it some time ago from Bosch OZ web site, but can't find it now to post links.
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File Type: pdf Page 1 from sensors_airmass.pdf (49.6 KB, 1196 views)
Last edited by myarmar; 06-24-2007 at 03:39 PM.
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Old 06-24-2007, 03:39 PM
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page 2
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Old 06-24-2007, 03:40 PM
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