X-Type 2ltr petrol jerking sometimes in 2nd gear-engine management light on but garage cant find any fault-any ideas-thanks all

 

Read OBD codes. Change garage!!

 

Welcome to the forum gibbos44,

I've moved your question from General Tech Help to X-Type forum. Members here with the same model will be able to help.

Please follow this link New Member Area - Intro a MUST - Jaguar Forums - Jaguar Enthusiasts Forum to the New Member Area - Intro a MUST forum and post some info about yourself and your vehicle for all members to see. In return you'll get a proper welcome and some useful advice about posting to the forum.

Graham

 

Are you able to simulate the jerking in 2nd gear?
Throttle positioning inducing the jerk?
Sport vs Non-sport mode

Is the jerking a hesitation in the throttle response that leads to a sudden jump in RPM? or does it bog briefly and jump back into the throttle initially before the sensation?

 

Does it happen whether you are accelerating from a stop or not? I imagine if it's happening in 2nd it's because you were at a light or something. Does it happen if you feather the pedal and ease through the gears? Is it only if you open the throttle from a stop and it stumbles at 2nd? Or is it regardless either way?

 

thank you for reply-it does not happen when i feather it but if i need to put foot down in 2nd/3rd jerks badly-cheers

 

OBD tool is about $5

 

Yes, get an OBD tool to be sure. I'm surprised the shop can't find a fault if your MIL is on. However, if your MIL flashes when it stutters but hasn't stayed on permanently then it's not storing a confirmed code. If you just go to the parts store or a shop that has a standard reader it won't likely show any pending code either. This is, at least, my experience. You'd have to have an OBD reader to catch the code while the MIL is flashing, or you've left the car running after it's happened and can plug in a reader to see what is pending. If you have a constant MIL on, then a reader is going to report the fault code as soon as you plug it in and run a scan.

I have a Lemur Bluetooth OBD reader and I bought it because I have an iPhone and it has a Lemur app that works with it. Others on here have suggested the ELM Bluetooth reader that can be found on eBay and runs with an app called Torque. Torque is only available on Android - hence why I bought a Lemur (iOS). If my MIL flashes it picks up a pending fault but if the MIL goes off and doesn't stay on, as soon as I turn the car off the pending code clears and it appears as though there is no fault until the next hiccup.

While you're on the hunt for an OBD tool to get to the bottom of the code you're getting, what it sounds like you are experiencing is a misfire on 1 or more cylinders. This could either be spark plug(s), coil(s), or simply oil seepage in the spark plug cylinder causing arc to the block. Only way to know 100% is to get an OBD reader. If you're having a misfire you'll see a code, or codes, P0301, 02, 03, 04, 05, 06 all indicating which cylinder in the firing order is misfiring. A P1111 means all diagnostics have cleared. You should have a P1111 when the car is operating properly.

 

I wouldn't recommend it