My light turned on so I scanned it for codes at work n it said Inj 5 control circuit fires improperly.Wats this mean? It's also studering at idle and on decellbut runs normal when on the gas at least half way

 

It means something's wrong in the wiring for fuel injector number 5. Someone here with a better memory than mine will tell you which one that is, but you'll need to back-track the wiring and see if there's a short. Even if you don't see one, feel the length of wiring: sometimes it melts inside the insulation without externally visible signs, but you can usually feel it. If it's done that, it's probably going to do it again, so it'd be worth trying to find the root cause of the problem.

It could also be out-of-range without being completely severed [this is probably the case], but anyhow, it just means something funky is going on with the wiring to injector 5. That should get you started, anyhow.

 

Thanx I guess ill hav to start lookin at the wire then

 

it could also be the injector itself

try swap with cylinder 6 and see if problem moves there. then you got a bad injector

you could also measure the resistiance in the injector and compare to the others.

good luck

 

Ok so I was driving around today n I noticed if I'm going down the street and it shifts in to over drive the rpms drop to 1500 and it shakes rly bad. Bit if I shift it into the 3rd position at the same speed the rpms come up to 2000 and it stops.

 

without having heard it, it sounds like its missing a cylinder,
did you get to check the wires and the injector yet ?