I have a 97 Jeep Cherokee that has no problems until a week ago. A week ago I wanted to do a tune up on my Jeep because I believed that the previous owner didn’t do a tune up for a long time. So I went to a local auto parts and got double platinum spark plug and premium spark wire set. I changed the old and put the new ones in. Then I went to turn on my Jeep Cherokee and my engine started shaking. I looked under the hood and check my distributor I saw it was beginning to be worn out so I bought a new one as well cap and rotor as well. It still shook but once I got the firing order on the wire set on correctly, my problems just got worse. The next day after all this my Jeep started to jerk once I pressed on the gas pedal and began to stall out. So I get a auto scanner and it tells me p0320 code which was something for the crankshaft position sensor so I replace it yesterday.At first it ran fine but I suddenly it but then it began to jerk like crazy and my gas gauge was flickering and so was my rpm gauge. After all this my Jeep Cherokee will start but it sometimes crank and run but once it starts to run it start jerking like crazy. I mean come on all of this for a tune up for a 97 Jeep Cherokee Xj. Help me plz and tell me what is my problem and how I can fix it. You may ask more questions.

 

Did you index and time the distributor properly? Or did you just pull the old one out and drop the new one in?

 

Yes I did and now it won’t start but crank real bad

 

In the question above, he asked two questions. I'm not sure if you did the work correctly or not....

For example;

Is the sky Blue or Green?
Yes

For the Crankshaft Position Sensor, did you buy a Mopar Sensor or a generic sensor?

Something you could try, but BE CAREFUL,

With the Jeep running at idle & in Park, try and remove one sparkplug wire at a time, from the sparkplug with a sparkplug wire remover and replace the sparkplug wire.

You are looking for a cylinder or cylinders that DO NOT change the idle of the Jeep. This will help you determine the cylinder(s) that might be a problem.

I would also recommend keeping the sparkplugs original copper style.