EVO Intake Box and MAF
#31
07-04-2005, 12:28 PM
Join Date: Jul 2003
Location: Salt Lake City, UT - USA
Posts: 124
Rep Power: 26 
Thanks Stephen. I would appreciate the product name. I pulled the code on my car today. It will be no surprise to the PhD's on the forum but for the rest of us here is the only fault code in the OBDII.
P0102 MOD$11 1/1
MAF or VAF
Circuit Low Input
I erased the code started the car and within seconds the code came back. In a couple of days I will try to clean the MAF (using Stephen's product and recommendation) and let you know what happens.
P0102 MOD$11 1/1
MAF or VAF
Circuit Low Input
I erased the code started the car and within seconds the code came back. In a couple of days I will try to clean the MAF (using Stephen's product and recommendation) and let you know what happens.
#32
07-04-2005, 12:43 PM
I'm installing my EVO airbox next week so I hope I don't have this type of problem. I have over 25,000 miles over three years with no problems so....I'll post back about this in a few weeks.
#33
07-07-2005, 07:34 PM
Join Date: Jul 2003
Location: Salt Lake City, UT - USA
Posts: 124
Rep Power: 26
I just installed my new MAF ($400). The car runs strong again! We'll see for how long.
Stephen, I still have the old MAF and would like to try and clean it for a spare. What was the name of the cleaner you've used and where do I get it? Thanks everyone. Richard
Stephen, I still have the old MAF and would like to try and clean it for a spare. What was the name of the cleaner you've used and where do I get it? Thanks everyone. Richard
#34
07-09-2005, 03:26 PM
Id like to know as well Steve, I use Wurth brake cleaner ( rubbing alchohol and c02 as propellant ) it works well. Also ditto on the VW/Audi MAF problems Steve mentioned, we are not alone...
Also search the board for threads on this topic, as there are plenty.
Also search the board for threads on this topic, as there are plenty.
#38
07-10-2005, 01:07 PM
Originally posted by KPV
Here is a theory I have. I woul dlike to know if anyone has any thoughts on this.
Not knowing the internal workings of the Mass Air Flow Sensor (MAF), these are my thoughts.....
After reading the above, I am thinking the oil in the "oiled" air filter, as in the BMC and K&N filters, is the potential culprit. As an analogy, consider the use of halogen bulbs. It is fairly common knowledge that halogen bulbs should not be handled with your fingers. As I understand it, this is because the oil from your fingers, however dry they may appear to be, will "cook" the glass locally when the bulb is lit and eventually cause the glass to break from uneven heating. Since a MAF is a heating element that correlates temperature change to air flow, is it conceivable that some of the oil of the air filter collects on the MAF wire and causes premature failure????? Much like a halogen bulb?
I may be all wet with this. I want to hear opinions please.
Here is a theory I have. I woul dlike to know if anyone has any thoughts on this.
Not knowing the internal workings of the Mass Air Flow Sensor (MAF), these are my thoughts.....
After reading the above, I am thinking the oil in the "oiled" air filter, as in the BMC and K&N filters, is the potential culprit. As an analogy, consider the use of halogen bulbs. It is fairly common knowledge that halogen bulbs should not be handled with your fingers. As I understand it, this is because the oil from your fingers, however dry they may appear to be, will "cook" the glass locally when the bulb is lit and eventually cause the glass to break from uneven heating. Since a MAF is a heating element that correlates temperature change to air flow, is it conceivable that some of the oil of the air filter collects on the MAF wire and causes premature failure????? Much like a halogen bulb?
I may be all wet with this. I want to hear opinions please.
Hmm... spoken like a true engineer!
#39
07-10-2005, 03:40 PM
Join Date: Jul 2003
Location: Salt Lake City, UT - USA
Posts: 124
Rep Power: 26
Originally posted by 45otto
I have cleaned my MAF and put it back in, but still have the error codes/lights. Anyone know how to clear the codes without a trip to the dealership?
I have cleaned my MAF and put it back in, but still have the error codes/lights. Anyone know how to clear the codes without a trip to the dealership?
Otto, I picked this one up http://www.actron.com/product_detail.php?pid=16150 Seems to work ok. I also have http://www.autoenginuity.com software which is much more robust.
#41
07-10-2005, 04:28 PM
Well, I sprayed down the MAF with brake cleaner that said "no residue". Let it dry, reinstalled it, cleared the codes with my new handy dandy ODB II scannerĂ¢â‚¬Â¦..woot.
And before I get out of the garage the codes are back...ohh no!!
So, what is the proper way to clean the MAF? What part if it needs the cleaning?
And before I get out of the garage the codes are back...ohh no!!
So, what is the proper way to clean the MAF? What part if it needs the cleaning?
#42
07-10-2005, 05:29 PM
http://www.knfilters.com/massair.htm
K&N MASS AIR FLOW SENSOR STATEMENT
At this time, K&N is unaware of any evidence that K&N air filter oil from a K&N air filter can damage or cause the malfunction of a MAF sensor, regardless of the make of the vehicle involved. K&N takes seriously any claim that one of its products is incompatible with its designated application or can damage or cause the malfunction of any automotive component. Such claims are thoroughly investigated and, when appropriate, testing is undertaken to determine their merit. In the case of MAF sensors, ongoing tests have shown that contamination from K&N air filter oil has not caused any failures or malfunctions of the MAF sensors in the test vehicles. K&N is aware that MAF sensors can become contaminated for a variety of reasons, unrelated to a K&N air filter (such as backfiring, blowby, leaking airbox or leaking intake duct) and that various methods have been used by some service departments and repair shops to clean a dirty or contaminated MAF sensor, such as spraying with an appropriate cleaner. K&N has not completed any tests as to the efficacy of such a process and, therefore, does not officially endorse or recommend any cleaning process. However, if given the choice of either replacing a MAF sensor or cleaning it, K&N recommends that the consumer ask his or her automotive dealer to attempt cleaning, before replacement. It should be noted that the presence of contamination does not mean the contamination was the cause of the MAF sensor failure. Sensors can fail for electrical or mechanical reasons, unrelated to any visible contamination.
K&N MASS AIR FLOW SENSOR STATEMENT
At this time, K&N is unaware of any evidence that K&N air filter oil from a K&N air filter can damage or cause the malfunction of a MAF sensor, regardless of the make of the vehicle involved. K&N takes seriously any claim that one of its products is incompatible with its designated application or can damage or cause the malfunction of any automotive component. Such claims are thoroughly investigated and, when appropriate, testing is undertaken to determine their merit. In the case of MAF sensors, ongoing tests have shown that contamination from K&N air filter oil has not caused any failures or malfunctions of the MAF sensors in the test vehicles. K&N is aware that MAF sensors can become contaminated for a variety of reasons, unrelated to a K&N air filter (such as backfiring, blowby, leaking airbox or leaking intake duct) and that various methods have been used by some service departments and repair shops to clean a dirty or contaminated MAF sensor, such as spraying with an appropriate cleaner. K&N has not completed any tests as to the efficacy of such a process and, therefore, does not officially endorse or recommend any cleaning process. However, if given the choice of either replacing a MAF sensor or cleaning it, K&N recommends that the consumer ask his or her automotive dealer to attempt cleaning, before replacement. It should be noted that the presence of contamination does not mean the contamination was the cause of the MAF sensor failure. Sensors can fail for electrical or mechanical reasons, unrelated to any visible contamination.
#45
07-11-2005, 12:11 AM
Originally posted by 45otto
I have cleaned my MAF and put it back in, but still have the error codes/lights. Anyone know how to clear the codes without a trip to the dealership?
I have cleaned my MAF and put it back in, but still have the error codes/lights. Anyone know how to clear the codes without a trip to the dealership?
Pocket Logger
Mike