2004 Chevrolet Tahoe "multiple misfire 2003 jeep" Questions

...it will work well and later it will sart misbehaving... and it also tells me random multiple misfire What about a jeep? I thought you had a nissan? If you have misfire codes, take it to a repair ...

error codes jeep liberty 2003 po300 Multiple misfire across all cylinders

multiple misfires....this lead to replacing the coil,  which made the car run....but, it backfired and blew out the muffler and  catalytic converter like a bomb.....unbelievable. Then I 

multiple miss fires. They changed the spark plugs and I had the regular maintenance done on the vehicle as well. The check engine light was off when I got it back and then a day later it came back on,

...multiple misfires on cylinders(random). this can be due to your vacuum leak over somehere on intake manifold. you can diagnose leaks by spraying brake pad cleaner on engine block when it is running. ...