1999 Dodge Neon

So what's the symptoms? If the engine doesn't start, did you check for spark or just get hung up on the injector issue?

If the timing belt is off by one tooth, the "Check Engine" light will be on. If it's off by two teeth, the computer will shut the engine down by turning off the Automatic Shutdown relay. The ASD relay feeds battery voltage to the coils, injectors, and fuel pump or pump relay. If the belt is off by three teeth, the pistons will hit the valves.

If the timing belt is installed correctly, and the engine still doesn't start, remove the camshaft sprocket and inspect the dowel pin. When they break, the camshaft slips a little on the sprocket. Even though the sprocket is in time, the cam, and the cam sensor on the other end of the cam, are both late, just as if the timing belt was off. The common symptom of this problem is a spark every now and then and only the two center injectors fire intermittently.

caradiodoc

my 1999 neon will start, but it only run on 2 cylinders. i have checked the fuel psi,the spark is good, and the compression is good on all 4. i have been doing this sort of thing since i was ten, this one tells me that it is the pcm, but before i get one i was looking for a second opinion. i have double checked the timming. but if it was off,like you said the autoshut off relay would be tripped. it runs good even though it is only running on 2cyl. thanks ivan

There are protection circuits built into the pcm that turn off the drivers to prevent overloading them from excessive current. I've never run into two dead injectors at once, but you might try unplugging one dead injector to see if the other one will come to life. I don't think you have to stop the engine and restart it.

caradiodoc