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Apex Motorsports · 04-25-2013, 08:22 AM

GM uses two supplier for Camaro SS MAF sensors. The simple explanation is that "weak" sensors from one of the suppliers are not showing the same resistance levels as the "strong" sensors from the other. Both work fine when the car remains stock but when additional airflow is introduced the "weak" sensor can start to become a problem.

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 causes hesitation, throttle lag, and poor driveability. 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.

So what kind of performance issues will a "weak" MAF sensor present? Slow throttle response, low RPM bunking and surging, choppy idle, bogging when downshifting or applying quick heavy throttle inputs, and more. The good news is that all you have to do is 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 the threads below.

Issue SOLVED strong MAF

Strong MAF sensor. Believe the hype

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 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 due to modifications is when problems arise. Because of that it is not something that GM will replace under warranty.

04-25-2013, 08:22 AM	#1
Apex Motorsports Drives: 2000 Camaro SS Join Date: Feb 2010 Location: Louisville, Ky. Posts: 25,179	"Weak" vs "Strong" Camaro SS MAF Sensors GM uses two supplier for Camaro SS MAF sensors. The simple explanation is that "weak" sensors from one of the suppliers are not showing the same resistance levels as the "strong" sensors from the other. Both work fine when the car remains stock but when additional airflow is introduced the "weak" sensor can start to become a problem. 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 causes hesitation, throttle lag, and poor driveability. 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. So what kind of performance issues will a "weak" MAF sensor present? Slow throttle response, low RPM bunking and surging, choppy idle, bogging when downshifting or applying quick heavy throttle inputs, and more. The good news is that all you have to do is 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 the threads below. Issue SOLVED strong MAF Strong MAF sensor. Believe the hype 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 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 due to modifications is when problems arise. Because of that it is not something that GM will replace under warranty. Last edited by Apex Motorsports; 12-31-2015 at 12:44 PM.