MAF Readings

[Kountry 2SUM]

2004 Newmar MA W22 Workhorse 8.1 with Ultra Power ECM.

What should the MAF Air Flow be reading on the OBDII scanner? Is there a benchmark for the reading (certain RPM, idle, percentage of another parameter etc?) Was informed that the reading was low but I don't know what the correct reading should be.

[geofferyh]

Before you get to thinking you have a bad MAF, clean or replace your air cleaner and then clean the MAF. I found this info online and keep it as a reference.

How to Clean a Dirty Mass Airflow Sensor
Generally, you'll want to clean your mass airflow sensor either every six months, or every time you change your oil. Cleaning it when you change or clean your air filter will be a good way to save both time and money.

Remove the Sensor
To clean your mass airflow sensor, first, you must take it out. This is done by opening your vehicle's air box. When removing the sensor, be sure to never touch the wires. A disconnected mass airflow sensor can't electrocute you, but the wires are delicate and small. Breaking one will require a replacement, which can run upwards of $100, so it's best to be cautious.

Clean the Sensor
The cheapest option would be to take your mass airflow sensor and place it in a plastic bag filled with rubbing alcohol. Take the bag and move it around, making sure the alcohol washes all of the dirt and grime from the sensor. Another option would be to go to your local auto parts store and buy a special mass airflow sensor cleaner, and spray it onto your sensor.

Dry and Reinstall the Sensor
After cleaning your mass airflow sensor with either the cleaner, or rubbing alcohol, let it sit, generally for 20 minutes or more. The sensor must be completely dry before it can be reinstalled in your car, otherwise you may damage it.

[Kountry 2SUM]

Originally Posted by geofferyh

Before you get to thinking you have a bad MAF, clean or replace your air cleaner and then clean the MAF. I found this info online and keep it as a reference.

How to Clean a Dirty Mass Airflow Sensor
Generally, you'll want to clean your mass airflow sensor either every six months, or every time you change your oil. Cleaning it when you change or clean your air filter will be a good way to save both time and money.

Remove the Sensor
To clean your mass airflow sensor, first, you must take it out. This is done by opening your vehicle's air box. When removing the sensor, be sure to never touch the wires. A disconnected mass airflow sensor can't electrocute you, but the wires are delicate and small. Breaking one will require a replacement, which can run upwards of $100, so it's best to be cautious.

Clean the Sensor
The cheapest option would be to take your mass airflow sensor and place it in a plastic bag filled with rubbing alcohol. Take the bag and move it around, making sure the alcohol washes all of the dirt and grime from the sensor. Another option would be to go to your local auto parts store and buy a special mass airflow sensor cleaner, and spray it onto your sensor.

Dry and Reinstall the Sensor
After cleaning your mass airflow sensor with either the cleaner, or rubbing alcohol, let it sit, generally for 20 minutes or more. The sensor must be completely dry before it can be reinstalled in your car, otherwise you may damage it.

Thanks! I found this article as well and followed the instructions. I was having a loss of power and a Trouble Code for O2 sensors. Read the article about the MAF and cleaned it according to the tutorial. But according to a good technician the MAF is reading low. I have a new MAF ordered but would like to know what it should read and at what parameter. Should it be read at a certain RPM or throttle station, or at idle with the blinker on and one window rolled down JK.

[edgray]

Since you have an Ultra power modified ECM, why not call them?

[Kountry 2SUM]

I just got my answer fron them Ed. They've been busy today so thought i could learn something from this wonderful forum again. Thanks

[vettenuts]

And what was the answer? Did they re-map the MAF?

[Oemtech]

Get yourself a can of MAF Sensor Cleaner....

[Kountry 2SUM]

Originally Posted by oemtech

Get yourself a can of MAF Sensor Cleaner....

Like I said, I already did that but he reading is still low.

[Kountry 2SUM]

Originally Posted by vettenuts

And what was the answer? Did they re-map the MAF?

No re-map. 230 g/s is the number at full throttle. I am at 165. New MAF is on the way.

[Arch Hoagland]

Let us know if the new MAF clears the problem.

Do you remember the check engine light code you were getting?

Are you using a K&N air filter?

[Kountry 2SUM]

Originally Posted by Arch Hoagland

Let us know if the new MAF clears the problem.

Do you remember the check engine light code you were getting?

Are you using a K&N air filter?

http://www.irv2.com/forums/f22/troub...es-300547.html

[Kountry 2SUM]

Originally Posted by Arch Hoagland

Let us know if the new MAF clears the problem.

Do you remember the check engine light code you were getting?

Are you using a K&N air filter?

No K&N. There wasn't one in it when I bought it either. I did change the filter though.

The MH came from a humid climate though and I'm wondering if the MAF elements have rusted a bit. That would make sense as to why the cleaning didn't work. It worked enough to clear the codes but not to the point that it b came efficient.

[Arch Hoagland]

OK, so now we wait for the new MAF to see if that cures the problem.

[Kountry 2SUM]

Originally Posted by Arch Hoagland

OK, so now we wait for the new MAF to see if that cures the problem.

Installed the new MAF and the reading was 213. I'm thinking it might be a little shy because we live at 6500 feet. Anyway it runs wonderfully. We headed out for a 4000 mile trip next week. I'll have a better idea once we get to sea level as to how it really runs and any gas mileage improvements from Brazel's ECM upgrade.