How well is your MAF performing?
Our old MAFs are not all created or performing equally. They do wear out & some are already almost or completely shot.
I have found that many MAF have seen their better days and are losing their luster & signal strength..
Recently, I have been testing a few MAFs: OEM DE, N60, & E60/61. Its amazing the differences found among these 10-15+ year old MAFs.
Tested several and found the signal strength to vary as much as 1.5v @ idle. Thats approx 1/3 of the max MAF voltage of 5 volts.. I found some MAFs reading @ .22 & .072v!! The normal MAF idle voltage is between 1.5 v & 2.0v at operating temp.
Old weak MAFs can cause weird idle problems & strange hesitation issues. If your car is having these problems, you can test your MAFs to identify its signal condition. Its easy, just test the MAF signal @ idle with the positive connector your grounded DVM set on the voltage setting. The weak ones will be very obvious with their low readings (usually under 1v) & compared to a good MAF will have a noticeable stumbling idle difference.
I have discussed this with Calum on several occasions. Lots of performance issues, poor fuel mpg, and hestitation issues are probably being caused by worn-out MAFs.
The idle MAF voltage must be greater than the Low MAF Voltage Enrichment Trigger constant in your ecu bin file.
Otherwise wierd idle/performance issues can occur..
Normal Calums bins has this constant set at 1.0v and Jim Wolfe bins has the constant set at 0.0v or 0.01v.
So Im thinking that the MAF should read at least 1v just to be safe..
Calum provided this info to manually add this constant to the xdf,
Create the following:
-constant/scalar
-address 0A22 or EA22
-size 16 bits
-units of Volts
-conversion formula of 'X * .005'
-title: EA22 - Low MAF Voltage Enrichment Trigger
Then save your XDF..
Thought I would post this information & to see if other members have experimented with this.
Also posted this to inform members of our old & tired MAFs..
Also be aware that many Junkyard MAFs are also old & weak...
Update:
Found this link on the old forum with similar info..
It is looking at the MAF causing idle/stall dive issues b/c the MAF/Filter is placed in a
turbulent location (fender well). Who knew??
I have found that many MAF have seen their better days and are losing their luster & signal strength..
Recently, I have been testing a few MAFs: OEM DE, N60, & E60/61. Its amazing the differences found among these 10-15+ year old MAFs.
Tested several and found the signal strength to vary as much as 1.5v @ idle. Thats approx 1/3 of the max MAF voltage of 5 volts.. I found some MAFs reading @ .22 & .072v!! The normal MAF idle voltage is between 1.5 v & 2.0v at operating temp.
Old weak MAFs can cause weird idle problems & strange hesitation issues. If your car is having these problems, you can test your MAFs to identify its signal condition. Its easy, just test the MAF signal @ idle with the positive connector your grounded DVM set on the voltage setting. The weak ones will be very obvious with their low readings (usually under 1v) & compared to a good MAF will have a noticeable stumbling idle difference.
I have discussed this with Calum on several occasions. Lots of performance issues, poor fuel mpg, and hestitation issues are probably being caused by worn-out MAFs.
The idle MAF voltage must be greater than the Low MAF Voltage Enrichment Trigger constant in your ecu bin file.
Otherwise wierd idle/performance issues can occur..
Normal Calums bins has this constant set at 1.0v and Jim Wolfe bins has the constant set at 0.0v or 0.01v.
So Im thinking that the MAF should read at least 1v just to be safe..
Calum provided this info to manually add this constant to the xdf,
Create the following:
-constant/scalar
-address 0A22 or EA22
-size 16 bits
-units of Volts
-conversion formula of 'X * .005'
-title: EA22 - Low MAF Voltage Enrichment Trigger
Then save your XDF..
Thought I would post this information & to see if other members have experimented with this.
Also posted this to inform members of our old & tired MAFs..
Also be aware that many Junkyard MAFs are also old & weak...
Update:
Found this link on the old forum with similar info..
It is looking at the MAF causing idle/stall dive issues b/c the MAF/Filter is placed in a
turbulent location (fender well). Who knew??