well i put the 93 tune on (figured it would make it worse if it was going to happen again) i have ran the truck about 150mils and no codes. so i'm still not sure why the light came on in the first place....

would the MDS being off had made it worse? hadnt thought of it before. i had seen some people saying they were getting better results without the MDS so i thought i would run a tank without it. could the truck not going into MDS had made it worse? i may try putting the 91 tune back on with the MDS ...

well i ran the truck close to 100 mils and still no codes.

the oct booster was STP. i norm use Lucas, but the store was out.

the funny thing with the dealership was that the MOPAR CAI was bought and put on by a dealership... if anything they should have replaced the CAI, if thats what they thought ...

well in my case i saw a .5 MPG loss on the mileage booster. which is nothing. but seeing that this was supposed to help gain MPG and not lose it. i see no point in using it. i would much rather have the performance when i want it and get about the same MPG as the one with less performance...

i have put the stock tune back on and ran it about 20+ mils. no lights on yet. gotta work tomorrow so that will be 70 more mils on it. when i first got the truck (4000 mils) i could swear it had an exhast leak. after taking it back to the dealer several times and them replacing several different ...

i have the U7137 recently updated to the new 9r12. i was trying out the new mileage booster. with no real gain in MPG, i switched back over to the 91 Oct tune i was using before. i have had it back on the 91 tune for about 5 days. this afternoon on my way home the check engine light came on. i read ...

doing better then i am.... i'm only getting 17.8 with the mid grade tune and premium gas. i just put the mileage booster on yesterday. hope it yields better results for me. i feel really stupid keeping the cruse set on 65 all the time if i'm not saving any gas.

MODs: Mopar cold air W/large K&N ...