Help identify this MAF sensor
Burning Brakes
Joined: Aug 2004
Posts: 1,174
Likes: 125
From: Dunstable MA
St. Jude Donor '05
I bought one of those for my 87 a few years ago, and I was always worried about it. The car ran, but there were some funny behaviors. It failed this year, and I replaced it with a rebuilt Bosch from Pep Boys. At $125. the new one was a bargain. Be sure to put the core in the box when you return it so as not to invite too close of an inspection.
Le Mans Master
Joined: Jul 2007
Posts: 5,043
Likes: 8
From: Tampa Florida
Microtech I run one.Those Microtecs have a lifetime warranty on them take it back to the autoparts store with your receipt and they will give you another one for free. I run the same sensor and it works pretty good as long as you don't spray it with MAF cleaner spray.
Not a good idea to use a "MAF" cleaner spray on those as it tends to make the super thin element (transparent orange strip in picture 3) curl up and alter the airflow's path across the element and thus altering the voltages of the circuit. I can see in picture 3 that yours is curled up a bit. If you get anther Microtech MAF ensure the transparent orange strip inside the MAF is perfectly flat/straight.
Thread Starter
Racer
Joined: Jun 2010
Posts: 290
Likes: 5
From: Winona MN
Microtech I run one.Those Microtecs have a lifetime warranty on them take it back to the autoparts store with your receipt and they will give you another one for free. I run the same sensor and it works pretty good as long as you don't spray it with MAF cleaner spray.
Not a good idea to use a "MAF" cleaner spray on those as it tends to make the super thin element (transparent orange strip in picture 3) curl up and alter the airflow's path across the element and thus altering the voltages of the circuit. I can see in picture 3 that yours is curled up a bit. If you get anther Microtech MAF ensure the transparent orange strip inside the MAF is perfectly flat/straight.
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Le Mans Master
Joined: Jul 2007
Posts: 5,043
Likes: 8
From: Tampa Florida
A bunch of stuff could cause surge and miss at higher RPMs.
Tough to say if your problem is the MAF sensor, connections, relays or even the ECM at this point - I'd be tempted to get a hold of or buy a ALDL to USB cable (~$60) and download Tunerpro (freeware software) and see what was going on with the sensor's output values before you start changing stuff out.
From what I've read you would not be the first person here on the CF to report a problem with a Microtec MAF sensor - perhaps they are having or starting to have quality control problems with this product. I bought the Microtech MAF a few years back because I was tired of forking out hundreds of $ every 4 or 5 years or so for a new Bosch MAF sensor. I've had to replace the 1st Microtech MAF after ~3 years...the one that failed pretty much just imploded while I was sitting @ idle at a traffic light. Returned my bad MAF and got a replacement MAF with no complications.
As mentioned above that rebuilt Bosch sensor from Poop Boys at $125 sounds like a honey of a deal to me. When you relace a MAF sensor it is always a good idea to change out both the power and burn off relays at the same time.
