PeachParts Mercedes-Benz Forum - View Single Post - got it this time

mdisav · #11 10-23-2006, 06:37 PM

There has been just so much energy put into this one, I just had to post it that way. I did not mean to bring so much pain.

Yes, I did join the federation after much searching on the tdi forums.

Step 1 : Buy this device - Airtrol F4200-X30
Step 2 : Buy this diode from radio shack. I can not find the number. I will have to add it later.
Step 3 : Set the device to switch at about 19 or 20mm Hg
Step 4 : Snip the last number wire on the maf. It is number 5 or 6 depending on the maf used. Mine was yellow. I snipped it next to the computer under the plastic cover. Just make sure you have the proper one. Also the device fits neatly in there and it is quite obscure.
Step 5 : Hook top (com) terminal to wire to maf, hook middle (NC) terminal to diode, hook bottom (NO) terminal to other end of diode which also has the wire to the computer hooked to it. Just make sure the diode flow is going from NC terminal to NO terminal. All connections must be really good or soldered.
Step 6 : Hook vacuum hose that goes from solenoid to egr to the device instead.

When the computer sends vacuum via the solenoid to open the egr it will switch the device instead. The diode will create the necessary voltage drop that the computer is suppose to see from the maf. When not activated the circuit functions as normal.

Report back with success and/or questions. Good luck!!