" shuddering jimny "

X reg Jimny - luv this car good runner however recently when driving engine managemnet light comes on and car shudders and feels like its losing power esp uphill ! diagnostic tests done twice showing nothing. new plugs distributor leads in still the same. feels like car will die and shudders bad i drop gear picks umy baby keeps pushing on  could this be my catalic converter ?  when turning idle engine turns over no problems...checked under side my cat looks pretty old.Stuart

Blocked cat is a good call, but could also be failing sensors.

X reg means it will have the G13 engine that I am not familiar with, no doubt others will know better. But on the newer M13 theres crank and cam sensors which fail and promote similar symptoms. I presume the G series will have at least one of these sensors.

A test for the sensor thats failing is to cool it when the problem appears (locate and squirt with water when having the problem). The sensor that responds to cooling is the one to replace. Use genuine parts for these sensors to avoid returning hassle in short time

To test if its the cat, its gotta come off to see and by the time its off you might as well bung a new one on...

I had a T reg 99 and the cam sensor went, causing these kind of problems, tbh they're so cheap I bought both, tried cam first and solved the problem, still have the crank shaft sensor somewhere...

Hi Riccy

Appreciate help sensors - cam crank sensors ill check out i can see one behind engine replace anyway and take it from there - so frustrating but great advice ta. ive been pushing it driving my jimny when sick and seems catylic converte i want to try and aviod replacing as equals pound signs !

Thanks for advice ill give it a go.. ...Stuart

Thanks for reply second guy thats mentioned sensors - i can see where cam sensor is will replace and see if fixes - ive been driving my jimny when sick pushing it will take it off road and try and fix - sensors cheaper fix than replacing catylic convertor !

ill see how i get on..cheers much appreciated..Stuart

Jimny exhaust Catalytic Converters are not to expensive 
If it's the pre cat on manifold you can smash it out with a long screwdriver
It will still pass an mot 
Take a look on ebay