liberation

Cherokee - 1993 - petrol - 4 litre - 90,000miles

Hi can anyone help?

When running at average or high speed (25 to 90 miles an hour) the engine stutters intermittently. Problem might stop for thirty or more miles then a period of missing occurs for anything from three to thirty seconds. Only seems to happen when engine is at normal running temperature. I’ve replaced the Crank Shaft Position Sensor but problem persists.

Any help appreciated. J

XJninja

At 90k... when's the last time you replaced the spark plugs, distributor cap and rotor? Check the plug wires for any splits, cracks, etc... Fuel system check would be next... Fuel filter maybe. First thing is always to check the simplist things before anything else..

liberation

thanks for that, havent had the car long so not sure when things were changed so i will have a go this weekend as you say basics first. i was sure it was going to be the sensor though!

XJninja

No problem. Always start with the basics. Its cheaper that way and its basically the process of elimination that will help you to diagnose the problem...

wvblackjeep

cel? my 95xj is doing the same thing driving me nuts. let me know if you solve it. I've replaced cap,rotor,plugs,ignition coil,#3 injector, today replaced fuel pump,filter. nothing helped about to order all new injectors.will let you know if this takes care of it...good luck!

liberation

if the injectors work let me know.

i was wondering about the fuel filter but first i will sort the basic ignition bits, fingers crossed it works.

liberation

hi.

crank shaft position sensor
coolant sensor
distributor cap
rotor
leads
plugs
cleaned carb

still the beast splutters, what next...PLEASE

XJninja

Your 93 is carburated? Well try running some seafoam gas additive through a tank and see if it clears up. Could be the fuel filter I guess but Ive alwys had good luck wth rough running cars and bikes usin seafoam. Walmart or the autoparts store will have it.

liberation

thanks for that but have added fuel cleaner additive and new fuel filter still the problem persists. trying to find a mat sensor in the hope it's heat related. still any other ideas are more than welcome. cheers, j