Sorry I'm not sure I know the difference? I'm a total novice. I'm having an issue with my jeep. Was told that i may have a cracked cylinder.
I've had my 01 xj in a couple garages in the north eastern pa area and I can't seem to get anyone to give me a good diagnosis....the jeep has a new radiator, new coil pack, and a new crank position sensor, new thermostat.
I Hooked up the code reader and I'm getting misfires in all cylinders. Sometimes it happens right away, some times I might drive 10 miles before it happens usually when I'm I'm going up hills or if driving on the highway and slow down due to traffic.
As if that weren't enough i also have a high pitched whistling noise when I let off of the gas pedal I don't know if the two are related or not?
Any one have any ideas? I've had a compression test done and the garage said everything looked normal.
Anyone have any idea? I'm at a loss.... Suggestions..cam sensor?
On a 2000 or 01 Cherokee 4.0 you have a 0331 head which is known to crack and does so in between #3 and #4 cylinders.If you have unexplained coolant loss it is most allways caused due to a cracked head,and in some cases compression tests will still fall within spec.A leak down test or coolant system pressure test will provide better results.Have you looked at the bottom of the oil cap for sings of milky colored oil? Most of the time you will find that prior to seeeing signs of coolant in the oil pan.If you continue driving the vehicle the way it is and coolant gets to the bottom end of the engine it wiil not take long before the engine will go as well.I would highly suggest parking your Jeep untill it is repaired.If you find that you have a cracked head which I highly suspect the head should be replaced with either a new head from Clearwater Heads or a TUPY 0331 head from a 2003 or o4 Wrangler or GC Both the Tupy and clearwater heads have been beefed up in the area where they are known to crack.I myself have replaced many of the 0331 heads and most allways use the new Clearwater head.A google search of cracked 0331 heads will provide you with a lot of information.I myself have two 2000 models in my driveway waiting on engine replacement because of the cracked head problem where the PO did not quit driving them untill it was to late.