TURBHOE

iTrader: (4)

well i for one would like to see a tune from someone with a good idle with no fuel trims on a returnless system.
mine idles smooth after it sits awhile but then it gets too rich but the trims are still way positive.

bluecamaroz28

Which years came with returnless fuel system on those trucks? Mine is 2003.

kbracing96

iTrader: (26)

04+ unless it is flex fuel

TURBHOE

iTrader: (4)

flex fuel is returnless also isn't it?

kbracing96

iTrader: (26)

The 04 ff I put in my dads truck was a return... Thats all I know...

TURBHOE

iTrader: (4)

oh gotcha.

bluecamaroz28

So, 2003 Trucks have fuel return line, right?

Whippled 496

iTrader: (4)

Yup, mine does.

TURBHOE

iTrader: (4)

did you buy those 60's? if so did you get a flow sheet with them?

Whippled 496

iTrader: (4)

No, i didnt get a flow chart, but they are Standard Siemen DEKA 60's and the flow chart is on the web site. I will be installing them on Saturday. I will get some pics and let you know how they worked. I will be using my new multec adapter harness too . Oddly enough if someone could explain this to me, when i added the Corsa catback to my truck, i went from a 97% IDC on the 42's to a 106% IDC on the 42's.......not sure why. I think the 60's should fix that though.