Hi all, recently I've encountered some CEL's from water entering my CAI and throwing the MAF readings out. This has mostly occurred in heavy rain where the roads are quite wet. Frustrating as the engine will miss a few beats and worrying as you think you may have a hydrolock issue. I have a CP-e CAI with the pre-filter water shield, however moisture has still managed to make it past this.
So after a bit of research and discussion I decided to install a water shield. I know some of you may already have this in place but talking to a few people out there who don't so if you'd like to do this then read on.
All you need is some flexible shielding material (I got some Universal Chequered plate from Super Cheap Auto), some cable ties, a drill and about 1/2 hour to install and complete. I did mine at the same time I cleaned my air filter as I didn't want to muck around twice removing wheels and guard lining.
Step 1 - Measure the area where the vents are located in the guard liner. On the MPS 6 the area is 300mm x 300mm
Step 2 - Cut the flexible material (Chequered Plate) to the size of the area you wish to cover. Stanley knife and a straight surface is all that is required.
Step 3 - Align the flexible material with the vents on the inside of the guard lining and drill 2 x 3mm holes at each corner and at the vertical midpoint to securely fasten the guard lining to the flexible material.
Step 4 - Insert cable ties through both the holes of guard lining and flexible material and tie off
Step 5 - Trim ends of cable ties and replace and reattach guard lining.
I gave this a brief test today with the garden hose spraying water at the vents whilst revving the engine and there were no signs of a CEL. Additionally the area around the filter still has access to sufficient air so closing these vents should not restrict airflow.
Cheers
Chris