"Weak" vs "Strong" 5th Gen MAF Sensors - ModernCamaro.com - 5th Generation Camaro Enthusiasts
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post #1 of 24 Old 09-06-2011, 04:40 PM Thread Starter
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Talking "Weak" vs "Strong" 5th Gen MAF Sensors

"Weak" vs "Strong" 5th Gen MAF Sensors

Recent work by our friends at Vararam uncovered a disparity in the way seemingly identical 5th gen Camaro SSs responded to increased air flow. After a little research it was discovered that the culprit is the OEM MAF sensors which have now been categorized as either “weak” or “strong”. This revelations has lead to a lot of questions and, as usual, a lot of bad information being posted on the internet. In this post I will try and set some of it straight.

What makes a MAF sensor “weak” or “strong”?

The simple explanation is that “weak” sensors are not showing the same resistance levels as the “strong” sensors. The MAF sensors that have been identified as “weak” read 1560-1670HZ at idle with the A/C off while a “strong” MAF reads at 1800MHZ. During on road, light throttle input the MHZ are slow and weak in response to throttle changes which is what causes the hesitation and throttle lag. At wide open throttle the “weak” MAF shows 120-170MHZ lower than the 8600MHZ the “strong” MAF sensors will show on the same car. Depending on what intake modifications are made the fuel trim with a “weak” MAF can range from -25% on the high end to -3% with just a simple aftermarket panel replacement filter. Pull the “weak” sensor and install a “strong” sensor and within seconds fuel trim is back to 0% and MHZ are back to 1800+. This will instantly change the personality of a car as was demonstrated in this post on Camaro5.com.

How can I tell if my MAF is “weak” or “strong”?

It is very simple. Remove the MAF sensor from your intake tube and take a look at the code inside the indented window. Any single letter MAF is “weak” and any MAF that features a letter followed by a number like the one in the picture below is “strong”.



Setting things straight

There are two points of confusion that seem to constantly come up when this topic is discussed:

1) This is a hardware issue with the MAF sensor and not a tune issue. The “weak” MAF needs to be replaced and the issue can not be corrected with a tune.

2) The “weak” sensors function just fine and are within OEM tolerances when the car remains in the stock configuration. Once additional air flow is introduced is when problems arise. Because of that it is not something that GM will replace under warranty.

Last edited by Apex Chase; 09-07-2011 at 04:22 PM.
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post #2 of 24 Old 09-07-2011, 11:15 AM
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Thanks for posting and looks like I am good - K11 in a 2010 SS
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post #3 of 24 Old 09-07-2011, 12:18 PM
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I have been having trouble with slow throttle response lately. I will check the number later. I have several exhaust upgrades...so I'm on my own as far as replacement. Can you tell me about the MAF Sensor upgrade that I've seen people refer to? And the cost if you sell them?
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post #4 of 24 Old 09-07-2011, 04:03 PM
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Envy you may want to go by your dealer with that problem, the MAFs in this post are in the LS3, L99 V8's and shouldn't be the same as the MAF in your 1LT 3.6 VVT
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post #5 of 24 Old 09-07-2011, 04:22 PM Thread Starter
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Quote:
Originally Posted by DopeTech420 View Post
Envy you may want to go by your dealer with that problem, the MAFs in this post are in the LS3, L99 V8's and shouldn't be the same as the MAF in your 1LT 3.6 VVT
+1 This is an SS specific issue.
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post #6 of 24 Old 09-07-2011, 04:35 PM
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Quote:
Originally Posted by DopeTech420 View Post
Envy you may want to go by your dealer with that problem, the MAFs in this post are in the LS3, L99 V8's and shouldn't be the same as the MAF in your 1LT 3.6 VVT
My dealer isn't going to help me since I have quite a few modifications on the car. As a result of reading this thread and the research it stimulated...I decided to run to Auto Zone and get some MAF Sensor cleaner. I cleaned the MAF sensor and just went for a test drive and problem solved...NO throttle hesitation at all!

Now I'll go back to my V6 section and leave you guys alone...lol. Thanks for the help
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post #7 of 24 Old 09-07-2011, 05:28 PM
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Its always good to know when stuff like this pops up, much thanks for putting it out there. : )

Racing stripes=100 hp!!!!
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post #8 of 24 Old 09-07-2011, 05:32 PM Thread Starter
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Quote:
Originally Posted by Envy View Post
My dealer isn't going to help me since I have quite a few modifications on the car. As a result of reading this thread and the research it stimulated...I decided to run to Auto Zone and get some MAF Sensor cleaner. I cleaned the MAF sensor and just went for a test drive and problem solved...NO throttle hesitation at all!

Now I'll go back to my V6 section and leave you guys alone...lol. Thanks for the help
That worked out well.
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post #9 of 24 Old 09-07-2011, 06:17 PM
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That worked out well.
Thanks for taking the time to discuss this with me Paul...I really appreciate it!
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post #10 of 24 Old 09-07-2011, 06:58 PM
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Now I'll go back to my V6 section and leave you guys alone...lol. Thanks for the help [/QUOTE]

i didnt mean it like that, glad you got your hesitation problem fixed though
i just assumed it didn't relate to your sensor being that its v6 and v8 like apples and oranges BUT then again the whole "global A" architecture GM is implementing on a few 2010+ vehicles may mean they are the same sensors. And would have same "component code"
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