I have a 2003 totally stock 2500 I recently bought (for really cheap) with injector trouble. When I bought the truck it had and electrical problem with the number 6 injector. The computer was throwing a p0206 code and I did a bunch of ohms readings and sure enough #6 was reading totally different. So I changed it (still thinking there were other bad injectors). I primed the fuel system and it fired right off and ran for about 30 seconds and now wont start at all. It pours blue smoke out of the tail pipe while I am cranking. It trys to but won't start. I can pull the fuse to the ficm and crank a little bit and the smoke goes away, and it doesn't even try to start. As soon as I put it back in and try to start it the smoke comes back. Does it sound like injectors to y'all? Or maybe something else? (I wouldn't know what else) Is there any way to test injectors in any kind of way with the truck not running? Thanks for the help.

 

welcome to DB

it sounds like you have one or more injectors that are bad. injectors that are over fueling will prevent the fuel pressure from going high enough to start the truck.

if you have no tools to monitor the fuel pressure or other parameters it can make diagnostics more difficult.

the only thing i can think of before having to tow it to a repair shop is to disconnect one injector electrical connector (this will disable two injectors) at a time and see if the smoke stops. if your lucky only one injector will be bad and the smoke will stop, truck may start but i would not run it like that for long as it will be severely unbalanced.

if it ends up being only one injector and you disable that one you may be able to limp it to a repair shop if you cant do the replacement your self

depending on how many miles you have on those injectors it may be best to replace them all

 

Thanks I like that idea. I can do the replacement no problem I just wanted to make sure that the injectors were most likely my problem before I spent the money