Truck not wired for mds. New engine has mds. Throws a random misfire code. Any way to fix?

 

We need way more formation than that to help you. Like what year truck, what year engine, etc. we are not mind readers.

 

its a 2006 ram 1500 megacab with the 5.7 hemi i did compression test chanhed plugs an boots chanhed injectors as well

 

The truck starts when i give it gas it will idle but as soon as it starts to get warm the idle gets really rough then dies it is missfiring on cylinder 1,4,6 and 7

 

and.....what year engine did you put in your 06 Ram?

 

I'd be willing to bet money he put a 2006 1500 hemi in it...problem is he (or whomever supplied the engine) did not realize a "1500 megacab in 2006" is basically a 2500. Who installed it? Default position for MDS is deactivated. Requires a PCM signal to activate it. As long as the solenoids are in the block but unhooked, it will function normally unless something has been screwed with.

 

Its a 06 engine but they probably did get it out of a 1500 imstead of a 2500 which your right about the megacab basically being a 2500 but i could put the solenoids back in an it will work fine? An i imstalled it my self my truck was not wire for mds so i took them out not knowing it would do this.

 

I knew it LMAO!! Put the solenoids back in and leave them. There's oil pressure lost through a port if the solenoids aren't there and you use MDS lifters; they collapse. Other option is to yank the heads and put all non-MDS lifters. Either way...a little research up front goes a LONG way vice charging in head first.

 

Sweet thanks for the well known knowlage haha always helps