The EARLS GM adapters to AN adapters are only available for -6 line.
There are 2 removable chips in the GM electronics
- eprom and - calpack
both have to be from a 6 cylinder app. otherwise the ecm will get pissed off.
I'd grab some eproms and calpaks from a 2.8TBI v6 and the 4.3 - with the 2.8 calibration and the 4.3 TBI it might be the best combo. Just make sure they are both from a '747 or '746 ECM.
fuel flow is... tank - pickup sock/inlet filter - pump - outlet filter - TBI (all -6) then TBI - submerged fuel return << very important or the fuel will flash when it enters the tank causing high pressue build up! return needs to be -6 as well.
Bring the TBI & fuel filter in with you when you get the adapters.
Last edited by efi-diy; 02/14/0904:24 PM.
51 GMC 4.2 turbo Can't solved today's problems using the same technology/thinking that created them