thewanderer
Junior Member
I bought my 2011 Ram 6.7 truck last October and it ran fine, except no cruise control. Within two weeks I put a new stereo and Viper alarm in it. In the next two weeks it started intermittently cranking but no start, but would sooner or later start. I took it back to the stereo/alarm people and they said it was the batteries. After $500+ new batteries it started normally. In the next three weeks I started the no start bs again, but would always start sooner or later. Finally it failed to start and I had it towed to the Ram dealer, where they said it was the Viper alarm/remote start causing the problem and disconnected that part of the alarm. A couple of weeks later it started the crank no start bs again. I totally removed the alarm and it worked fine. I took it back to the stereo/alarm people and described the situation with the alarm and the problems with the stereo. They put in another brand of stereo and would get back to me on the alarm situation.
Now it gets weird, with the new stereo I get better fuel mileage with no other changes. Now it almost always starts, but occasionally when I turn the key on, if the dash lights up with the fuel pump icon it will not start even with cycling the key several times. If the preheater icon comes on first, it will start every single time with no waiting. Most times the preheater icon lites up. If I use the engine brake frequently, the Check Engine lite will come on, code loss of communication with ABS module. If I don't use the engine brake, the Check Engine lite will go off and stay off.
Other than those things, the truck runs great, good fuel mileage. Any help or ideas will be appreciated.
Now it gets weird, with the new stereo I get better fuel mileage with no other changes. Now it almost always starts, but occasionally when I turn the key on, if the dash lights up with the fuel pump icon it will not start even with cycling the key several times. If the preheater icon comes on first, it will start every single time with no waiting. Most times the preheater icon lites up. If I use the engine brake frequently, the Check Engine lite will come on, code loss of communication with ABS module. If I don't use the engine brake, the Check Engine lite will go off and stay off.
Other than those things, the truck runs great, good fuel mileage. Any help or ideas will be appreciated.