MAF relocation
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Joined: Jul 2009
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MAF relocation
So i moved my maf from a such throught to a blow through and my car started idleing really bad. what do you think would cause this? Here is a crapy cell phone vid to show you what i mean. http://www.youtube.com/watch?v=L1HLZ65nEM4
Safety Car
Joined: Apr 2001
Posts: 3,525
Likes: 2
From: Houston TX
Idle surge from incorrect tune. Many of the SC'ed applications are set up with the MAF on the pressure side of the head unit vs the vacuum side. Proper dyno tune, and the surge should be handled.
Safety Car
Joined: Apr 2001
Posts: 3,525
Likes: 2
From: Houston TX
Where is the bypass valve located relative to the MAF? You can not bypass metered air (as in air that has passed through the MAF) back in front of the head unit, and expect the car to run decent.
The bypass inlet would have to be located prior to the MAF and discharge the air to the inlet of the blower. Even when doing in this manner, there is still a concern with reversion (air backing up) through the MAF.
Please provide details as to where the inlet to the bypass valve is in relation to the MAF location, and also include relative proximity between the bypass and the MAF.
The bypass inlet would have to be located prior to the MAF and discharge the air to the inlet of the blower. Even when doing in this manner, there is still a concern with reversion (air backing up) through the MAF.
Please provide details as to where the inlet to the bypass valve is in relation to the MAF location, and also include relative proximity between the bypass and the MAF.
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Melting Slicks
Joined: Dec 2000
Posts: 2,719
Likes: 60
From: Fremont Oh
If you have the MAF on the pressure side of the SC it could be the turbulance of the air is causing the MAF to keep trying to correct... I have always found that the having the MAF on the vacuum side worked better... The only time I really had to do anything was when I went to the 8 rib I had to reprogram the MAF in the ECM so it would not set the over reference error.
I added a length of wire to the connector and ran the MAF and relocated it right behind the air filter just as it would be in a stock scenerio... As you probably know, as long as you are in closed loop the engine will compensate to get you to ~14.7 AFR once you are in open loop then it is up to your tune to get you to the probler AFR from there...
Hope this helps!
MO
I added a length of wire to the connector and ran the MAF and relocated it right behind the air filter just as it would be in a stock scenerio... As you probably know, as long as you are in closed loop the engine will compensate to get you to ~14.7 AFR once you are in open loop then it is up to your tune to get you to the probler AFR from there...
Hope this helps!
MO
