I have a 2001 Nissan Maxima. The Engine light is on. Sometimes when i stop the car, it starts shaking, i am not sure if it shakes when i drive or not, everytime it happens, it is a little bit difficult to get the car to speed up, i have to press hard on my pedal to get it going. And i THINK every time that happen and if i have my AC on, i smell something weird, it does not smell like smoke, or burning, but i can't describe the smell. However it does not always happen though.

I brought it to Goodyear, they check the Engine light and they came up with the code P1320-P0303. And they charged me $400 to change the Spark Plugs and the Fuel Injector, though after that they said it might not work since the problem might be because of the Injector #3 is bad if the symptoms persist and they said the Intake has to be remove to check injector which will cost a lot a labor. The car still shakes after they change the Spark plugs and the fuel Injector, i called them and they said It must be because of the injector #3 and told me to get back to them. I felt like they are lying to me, i don't know anything about car so i need someone to correct me on this, Is goodyear making right step to fix my car?

I get my car to autozone and get it check for the Engine light, it came up with the code P1320:
Probable Cause:
-Open or Short circuit condition.
-Failed Power Transistor Unit.
-Failed ignition ballast resistor.
-Cam position sensor failure.
Anybody have any idea which one of those is the cause? I don't want to fix something that will not help.

 

Cam sensor, Nissan doesn't use the resistor

 

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