Join Date: Feb 2010
Thanked 16 Times in 11 Posts
3 Wire Fuel temp Mod, 3406E
I know,, i have read many times that the fuel temp mod has been written about many times,, however,, i could not find a drop dead way that workrd or did not have a problem.. So.
Here is what i did, using a Prolink 9000 in the data mode i read the fuel temp as it was ,, un modified,, 42deg..
Long story short, here is what i did.
Run to Radio Shack and buy a 5 pac of 150 ohm resistors... Go to the truck and Skin back the oarnge and white wire,,, leave the black wire alone,,, take 3 of the newly purchased 150 ohm resistors out of the packet and hook them together in a Series,, (3 in a row) solder them,, now take one end and wrap it into the oarnge wire,, and the other end on the white wire.. Solder,, wrap it up = Done..
Here is what you have accomplished,, the ECM will see a fuel temp of 160deg with no trouble codes,, this is reading the actual fuel temp readings on the Pro Link !! The changes ar every consistant and i have experimented with the 100 ohm and 150 ohm resistors. Note* if you just unplug the sensor the ECM will see 86deg.
If this has been done before ,, my apologys for wasting your time . The only post i could find was one where *dont quote me on this* cut the one wire and hook the other 2 together and then a resistor,, did not work at all !!
This i figured up.
Best to ya all !!
Last edited by KET19; 03-08-2010 at 12:13 AM.
Reason: Type o,, and now i cant find it