Tusc
Enthusiast
Battery sounds good.
What your dealer said about the cam position sensor makes a lot of sense and could fit the scenario - but the lack of any engine codes being thrown negated that possibility before the dealer replaced it. Other sensors like IAT are probably ok as well or they would throw a code.
I'm going to say that there must be a loose ground somewhere. That's my best guess without being able to pour over the car. I've done more than my share of wiring with late-model cars and faulty grounds will ruin your day. I know the Viper has 5 coil packs that each fire for two cylinders as well as providing spark twice to those cylinders. It would seem that the most logical place to look would be between the coil pack and the ignition/computer (since there is no distributor).
From personal experience, if you have any loose connections, corroded connections, bad grounds, partially frayed wires, or electrical components that are on their way out... these could all duplicate what you are seeing.
A dying starter solenoid on my Camaro would allow me to crank and fire the engine, but it would flip over and kill the ground if I went over 1100 rpm. But my car is "special" - a wiring nightmare due to the conversion.
We know you have fuel and the power to run the fuel pump, but the problem is that spark disappears... when? As soon as you start to move the car or put it in gear? Once its moving and the car gets jostled? After a specific period of time?
It sounds like a royal pain. The hunt may take some time, but I'm guessing it will be something small when you find it. Good luck, and keep us updated as you go.
What your dealer said about the cam position sensor makes a lot of sense and could fit the scenario - but the lack of any engine codes being thrown negated that possibility before the dealer replaced it. Other sensors like IAT are probably ok as well or they would throw a code.
I'm going to say that there must be a loose ground somewhere. That's my best guess without being able to pour over the car. I've done more than my share of wiring with late-model cars and faulty grounds will ruin your day. I know the Viper has 5 coil packs that each fire for two cylinders as well as providing spark twice to those cylinders. It would seem that the most logical place to look would be between the coil pack and the ignition/computer (since there is no distributor).
From personal experience, if you have any loose connections, corroded connections, bad grounds, partially frayed wires, or electrical components that are on their way out... these could all duplicate what you are seeing.
A dying starter solenoid on my Camaro would allow me to crank and fire the engine, but it would flip over and kill the ground if I went over 1100 rpm. But my car is "special" - a wiring nightmare due to the conversion.
We know you have fuel and the power to run the fuel pump, but the problem is that spark disappears... when? As soon as you start to move the car or put it in gear? Once its moving and the car gets jostled? After a specific period of time?
It sounds like a royal pain. The hunt may take some time, but I'm guessing it will be something small when you find it. Good luck, and keep us updated as you go.