EVO Intake Box and MAF
#16
07-03-2005, 06:31 PM
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.
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.
#18
07-03-2005, 06:44 PM
All it does is coat the maf and cause a misreading of air. The box moves so much more air any questionable maf will throw a code. It doesn't actually blow or burn it. Cleaning it will allow it to read again.
Oak, instead of being so cynical how about taking me up on my offer then you can decide if the box is an issue.
Oak, instead of being so cynical how about taking me up on my offer then you can decide if the box is an issue.
#19
07-03-2005, 06:52 PM
OK, I have this question...Should there be a regular maintenance schedule for the MAF...like every 1000 miles? This probably is an easy DIY where the MAF is removed, cleaned with electrical component solvent and re-installed. Is there a procedure for cleaning the air filters?
#20
07-03-2005, 06:55 PM
Not the MAF, but I always clean the new filters with brake clean and compressed air. WARNING, do not get air near the MAF. It will destroy it. Do this on the K&N type filters and you will be ok. The MAF could be cleaned as well, but you will never see the dealer say that. Easier to sell them.
#21
07-03-2005, 07:01 PM
Originally posted by PorschePhd
All it does is coat the maf and cause a misreading of air. The box moves so much more air any questionable maf will throw a code. It doesn't actually blow or burn it. Cleaning it will allow it to read again.
Oak, instead of being so cynical how about taking me up on my offer then you can decide if the box is an issue.
All it does is coat the maf and cause a misreading of air. The box moves so much more air any questionable maf will throw a code. It doesn't actually blow or burn it. Cleaning it will allow it to read again.
Oak, instead of being so cynical how about taking me up on my offer then you can decide if the box is an issue.
#22
07-03-2005, 07:32 PM
Originally posted by PorschePhd
The MAF could be cleaned as well, but you will never see the dealer say that. Easier to sell them.
The MAF could be cleaned as well, but you will never see the dealer say that. Easier to sell them.
#23
07-03-2005, 07:48 PM
Question: I have heard some suggest using the Boxter S MAF sensor. The theory behind it is? Another question ............. what is the size of the Boxter throttle body? Is it bigger? Would using the MAF sensor from a larger throttle body car help? Like the GT3 MAF sensor or?
Last edited by cjv; 07-03-2005 at 07:53 PM.
#25
07-03-2005, 10:29 PM
Originally posted by oak
stephan, thanks for the offer, but I don't think the EVO intake is for me. My turbo is just fine the way it is. As you know if you mod there is always an outcome in the chain, some good some not so good and some you may have to compromise. Some may have no problems and others may. I don't need the hassle.
stephan, thanks for the offer, but I don't think the EVO intake is for me. My turbo is just fine the way it is. As you know if you mod there is always an outcome in the chain, some good some not so good and some you may have to compromise. Some may have no problems and others may. I don't need the hassle.
If you ever change your mind let me know. Offer stands.
#26
07-03-2005, 11:44 PM
Originally posted by PorschePhd
If the maf is dirty at all and the new box is installed it will throw the codes. Much like bad plugs and a new program. You can clean the MAF. You must use an industrial circuit cleaner and let it soak for 20 minutes.
If the maf is dirty at all and the new box is installed it will throw the codes. Much like bad plugs and a new program. You can clean the MAF. You must use an industrial circuit cleaner and let it soak for 20 minutes.
#28
07-04-2005, 07:06 AM
Registered User
Join Date: Feb 2004
Location: Wayne, NJ
Age: 58
Posts: 1,857
Rep Power: 97 
Originally posted by ebaker
What is industrial circuit cleaner and where do I get it ? Is it a spray?
What is industrial circuit cleaner and where do I get it ? Is it a spray?
Radio Shack sells it along with any other electronics stores
#29
07-04-2005, 07:55 AM
Registered User
Join Date: Jan 2004
Location: Ontario
Age: 64
Posts: 478
Rep Power: 43
Hiccups
I had a case of those scarey hiccups with my car when immediately after washing I did the dry-off run around the block prior to final towel down. There was a small amount of water inside the intake housing at the time. On going through the gears it occurred three(3) times in three(3) different gears at higher rpms which would be when the heavy "sucking" occurs. There has been no subsequent episode.
I am confident that any growing pains will be quickly remedied by EVO and/or their suppliers. Imagine Auto is the cream of the crop and Stephen proves it every time he posts here on 6speed. When you try and ride the wave of performance you have to expect a certain element of "trial and error" no??? I am proud to be Stephen's client and rely on both his products and expert advice.
I am confident that any growing pains will be quickly remedied by EVO and/or their suppliers. Imagine Auto is the cream of the crop and Stephen proves it every time he posts here on 6speed. When you try and ride the wave of performance you have to expect a certain element of "trial and error" no??? I am proud to be Stephen's client and rely on both his products and expert advice.
#30
07-04-2005, 09:16 AM
Re: I don't think
Originally posted by RichardCH
anybody ever blew their TT MAF with either a B&M or K&N air filter and my cut back airbox works just fine, so it must be the EVO system, if so many have occured
anybody ever blew their TT MAF with either a B&M or K&N air filter and my cut back airbox works just fine, so it must be the EVO system, if so many have occured
And there have been just as many with the stock airbox. As I mentioned before the ECUs were blamed for a hiccup and the issue turned out to be plugs.; It was always the ECU, oops not really. Doing a research on the net on MAFs for the Audi, VW and Benz MAFs will show there is an issue with them. None of them have EVO boxes.
DO NOT USE the spray from Radio shack. This is a cleaner we use on PC board and is harsh smelling and comes in a gallon. I will get the name on Tues. I don't have any here at the house.