Kangarooing and no throttle response

Now weve established the engine type I would suggest performing the water test on the crank sensor this should tell you if thats at fault.

Prior to going out next locate the crank sensor under the alternator, once your familiar with where it is fill up a squirty bottle with water, next take your jimny for a nice run (I found it only done it when travelling for prolonged periods of time at speed........dual carriageway driving) do not stop your drive untill the fault occurs, once the car starts to fault (ie run erraticaly like you described) pull over LEAVING THE ENGINE RUNNING open the bonnet and squirt water onto the sensor..............if normal running resumes theres your problem.

Cheap as chips off ebay and can be fitted at home with a socket set etc.

I've had this on 4 m13a jimnys! Very common. Crank sensor each time ! On the vvt ones they changed the fan shroud on the radiator possibly to circulate more air over the sensor?

markyp2000 wrote: How can you say crank sensor you dont know what engine it has if its a tin top yes cranks sensor behind the alternator on tye twin cam engine but it could be a soft top running a single cam with a cam and crank sensor

Chill out, people are way to highly strung

Hi all, thank you for all the replys, didn't mean to cause any disputes! Sorry for the delayed reply, I tried to preform the water test but I was never able to get it to fault while I drove, dare I say it's my partners driving....anyway I went ahead and replaced the crank shaft sensor. Very simple job, loosen alternator, remove belt and push it out the way. Replace sensor and reassemble. So far it has not faulted and not sure if it's mind over matter but it seems to run smoother? I must ask, would this fault be recorded on the Ecu?
Once again thanks for all the replies and advice.

There is likely to be a fault code recorded and this may assist to diagnose what the issue is. Fault code reading needs a little skill and works best when done by people with knowledge and experience as they can make an educated decision.

For example, a crank sensor fault can cause a car to misfire, so you get the crank sensor fault code and codes for each misfiring cylinder. What do you blame? A coil pack for causing the misfire??? the crank sensor for causing the misfire??? etc...

Then again it may be plain and simple with just a code for the crank sensor.

I have a scanguage type thingy always plugged into mine and can read codes at will. When my crank sensor went up the swanny, it showed just the crank sensor code, so it was simple.

So it pays to have a code reader, but use some common sense when diagnosing the problem from codes, thinking about what the symptoms are.

At least you can have an educated guess with codes. If not, you can ask on here, telling us what codes you have and what the symptoms are.

The twin cams all run on OBDII, which is what most code readers work on, some older engines, such as soft top single cams, run on OBDI though, and I think Martin sells a code reader for them in the Big Jimny shop.

Kirkynut

It's interesting. That you say that, I had the car plugged up to see whether there is a fault recorded and there was nothing. Now the only thing I could think of was that the fault was not in the recording parameters of the Ecu..or its the Ecu itself. I think the car may have back fired and possibly blown the cat as there is a nasty rattle coming from the exhaust.