I own a 2001 Nissan Sentra 1.8 liter GXE. In March, I replaced two sensors. 1 (one) O/P Crankshaft sensor and 1 (one) O/P Valve Timing Position Sensor. In May, while driving, the car started to hesitate and what I would describe as choking. The engine was running roughly and there was a vibration felt while sitting in the drivers seat. A friend looked at the car and tested the ignition coils and it was determined that one was bad. (We loosened the screws and lifted the coil from it’s housing and noticed that while the engine was running there was no change or interruption.) When we tested the other three coils, there was engine disruption. So, I purchased a new ignition coil for $81.00 and installed it. The car was running great again. Until recently when it started to hesitate while driving and the rpm needle fluctuated at random times.
Thinking it might be another coil, I tested them by switching them. This time I had another friend helping me. Whatever we did, messed the car up even more. Now it will not start easily and stalls out. It is running extremely rough and I’m really not sure what to do. I know I should have let a professional deal with it, but I’m a single Mom on a very tight budget and it seemed so straight forward.
Do you think switching of the coils could cause this. I tried to put them back in their original spots, but unfortunately, I can not remember exactly where they were. They all look the same except for the one I purchased in May.
Please help me, I don’t know what to do. I’m afraid to drive the car now. Actually, I won’t drive it until I can get it back to running well.
Thank you very much for your help.