Join Date: Aug 2011
damanx is offline
Re: 1985 s15 2.8 liter idle problem
i've spent the last 2-3 months working over an 85 s15 with the 2.8l
you are going to need to make sure that you have the timing set correctly. if you can, verify that you have the #1 cylinder at tdc. with the distributor cap off, you want the rotor pointing about the 4 o'clock position as you are standing in front of the truck facing the engine. the firing order is 1,2,3,4,5,6 and the next position is #2 and so on. with it 180 out, you might be seeing some backfiring through the carb.
next, make sure ALL the vacuum lines are good and make sure nothing is disconnected.
is this tbi or carberuretor?