Our 2001 gas Class A lost power on the turnpike 4 weeks ago. It's still at the Ford dealer troubleshooting :? They know the mass air flow sensor was the culprit but now everytime they hook up the new one the MH looses power, when they disconnect it it seems to run fine. Question...it's been a month without our home(we full time) Can we drive it with the MAF sensor disconnected? What could possibly be the problem that the dealer can not figure out. They replaced the computer processor a year ago and now they replaced it again. Hopefully they are going to stand good for it since it's been less than a year. $7000 last year for new computer and brakes all around. We're afraid to call and get the verdict. Please advise...

A FORD dealership certainly should have all of the electronic equipment needed to properly diagnose, AND REPAIR, any issue with your engine and electronic control unit. The MAF is just one of many sensors that feed information to your ECU that allows it to adjust various systems so that your engine runs properly, with the right timing and air/fuel mixture. It appears that you have found a dealership with a "mechanic" that prefers to just throw parts at your problem at your expense. I think it might be time to talk with someone in authority at the dealership and find out why THEY cannot properly diagnose the problem. At Rockauto.com your Motorcraft MAF sells for about $170 and an ECU computer sells for around $200.

Have they looked for broken, burned, or chafed wires for the MAF sensor? It could also be one of the many ground wires for the ECU or MAF sensor being loose or corroded.

X2 had a problem like yours in arizona one time, dealer could not fix ,DROVE IT 60miles to earnharts in tempe AZ told my story, they called the next day said it was fixed. and it was.

Running with the MAF disconnected is certainly less desirable but will not hurt anything in the short term. If they can’t figure it out, it is long past time to disconnect the MAF so you can drive it to someone else who can fix it. Cut your losses and get the blazes out of there.

I wonder if the dealer is missing a short in the MAF wiring harness somewhere. Earlier this year I replaced the MAF on our 2001 F53 with a $40 aftermarket MAF from Amazon. I wasn't losing power though, just setting a code for the intake air temperature sensor part of the MAF. I noticed while changing it that the wiring grommet had slipped out of place and the wires had chaffed on the air cleaner housing. The chaffing wasn't through to bare wire though, so I taped it up and secured the grommet back in place.

Mass Air Flow Sensor | Good Sam Community

28 Replies

Johno02
Explorer
Jul 27, 2018
BTW, Ford identified the problem, and issued a recall to add a different air intake piece. Unfortunely, that piece is no longer available, so you have to make your own.
Johno02
Explorer
Jul 27, 2018
On that engine in a Class A, the intake air scoop and filter have a tendency to ingest water when it rains. This is the reason the MAS fails, because it gets wet. After someone finds out what your problem is and fixes it. Make a better shield for the air intake to deflect it from sucking in rain and water. My mechanic made one frrom an old antifreeze bottle, held in place with tiewraps. Haven't had any more problems.
Big_Katuna
Explorer II
Jul 27, 2018
There was a problem with the ground wires back then if I remember.

There were TSBs if I’m not mistaken.

My buddy had a 2000 V10 and suffered random check engine and power loss until it was fixed.

Had to run new ground wires from various sensors to a common point.
Dutch_12078
Explorer III
Jul 27, 2018
I wonder if the dealer is missing a short in the MAF wiring harness somewhere. Earlier this year I replaced the MAF on our 2001 F53 with a $40 aftermarket MAF from Amazon. I wasn't losing power though, just setting a code for the intake air temperature sensor part of the MAF. I noticed while changing it that the wiring grommet had slipped out of place and the wires had chaffed on the air cleaner housing. The chaffing wasn't through to bare wire though, so I taped it up and secured the grommet back in place.
naturist
Nomad II
Jul 27, 2018
Running with the MAF disconnected is certainly less desirable but will not hurt anything in the short term. If they can’t figure it out, it is long past time to disconnect the MAF so you can drive it to someone else who can fix it. Cut your losses and get the blazes out of there.
midnightsadie
Explorer II
Jul 27, 2018
X2 had a problem like yours in arizona one time, dealer could not fix ,DROVE IT 60miles to earnharts in tempe AZ told my story, they called the next day said it was fixed. and it was.
1995brave
Nomad
Jul 27, 2018
Have they looked for broken, burned, or chafed wires for the MAF sensor? It could also be one of the many ground wires for the ECU or MAF sensor being loose or corroded.
rgatijnet1
Explorer III
Jul 27, 2018
A FORD dealership certainly should have all of the electronic equipment needed to properly diagnose, AND REPAIR, any issue with your engine and electronic control unit.
The MAF is just one of many sensors that feed information to your ECU that allows it to adjust various systems so that your engine runs properly, with the right timing and air/fuel mixture.
It appears that you have found a dealership with a "mechanic" that prefers to just throw parts at your problem at your expense. I think it might be time to talk with someone in authority at the dealership and find out why THEY cannot properly diagnose the problem.
At Rockauto.com your Motorcraft MAF sells for about $170 and an ECU computer sells for around $200.

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Mass Air Flow Sensor

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