X_Type_South_Africa 0 Posted August 30, 2015 Report Share Posted August 30, 2015 Hi, I hope someone will be able to give me some assistancewith an issue I’ve been trying to resolve for a while. I have a 2008 model 3.0LV6 AWD X-Type with 150 000km (93 000miles) on the clock. I reallylove the car, and it’s the third Jag I’ve owned.About a month ago I started noticing a jitter, stutter, jerk(whatever you want to call it) when traveling in the city between 50-70km/h(31-44mph), particularly when travelling uphill or with additional weight inthe car, and I’ve had no warning lights appear on the dashboard. It doesn’toccur every time I drive the car, however when it does it seems that it occurswhen I accelerate normally through the gears until I reach the lowest gear andlightly feather the accelerator at about 44mph. The stutter goes away as soonas I apply the break or accelerate more rapidly. Furthermore, occasionally asimilar feeling occurs when accelerating from rest or close to rest, where itfeels as if I’m applying and releasing the accelerator at a fast rate or ammomentarily losing and regaining power, despite keeping the accelerator at thesame level.I serviced the car 3 weeks ago where the air, fuel and oilfilters where replaced as well as the engine oil, and also had a diagnostictest run on the car at my local Jaguar dealer, and no error codes wherereported. The issue wasn’t resolved. I found another local mechanic who workson Jaguars, who too ran a diagnostic on the car where a misfire in cylinder 3 wasreported. They found a leak in an air pipe which was fixed and the error codewent away, and all seemed fine, however the stutter wasn’t resolved. Aftertaking the car for a ride to experience the feeling, the head service manager feltthat it may be as a result of a misfire due to a faulty spark plug or ignitioncoil. I replaced all the spark plugs and bought one ignition coil and replacedit with the old one in cylinder #3, hoping the previous error code of a misfirein that cylinder was a hint. The problem is still there though; however thereis no guarantee that the faulty coil (if that is the issue) is actually in cylinder#3. Should I shuffle the coil that I know works around in the various cylindersin the hope that I eventually find the faulty one and solve the problem?Like I said it doesn’t always happen, however on occasions thatit does, the stutter seems more exaggerated than the previous time, and othertimes it’s very mild; I don’t want to ignore it which may lead to somethingbigger. Any kind of advice or help would be greatly appreciated. :) :) Quote Link to post Share on other sites
Old Peter 826 Posted August 31, 2015 Report Share Posted August 31, 2015 Hi Steve and welcome to the Club. I have read and mused on your post. You appear to have done a few things to solve the problem and I am wondering if it is a fuel problem that has not come to light. I come from the carburettor era and if the car had one I would have taken it off and cleaned it. So have you checked the fuel injectors? Other than that, juggle the coils around, as you suggested. Regards, Peter. Quote Link to post Share on other sites
X_Type_South_Africa 0 Posted August 31, 2015 Author Report Share Posted August 31, 2015 Hi Steve and welcome to the Club. I have read and mused on your post. You appear to have done a few things to solve the problem and I am wondering if it is a fuel problem that has not come to light. I come from the carburettor era and if the car had one I would have taken it off and cleaned it. So have you checked the fuel injectors? Other than that, juggle the coils around, as you suggested. Regards, Peter. Hi Peter, thank your for your response. It could be a possibility and suspected the same when the issue first appeared, and have since replaced the fuel filter. I will definitely do what you say and check the injectors. RegardsSteve Quote Link to post Share on other sites
X_Type_South_Africa 0 Posted September 19, 2015 Author Report Share Posted September 19, 2015 Thanks to everyone for all your assistance. Shortly after creating thisthread I solved the problem, however wanted to wait a few weeks to makesure the problem was truly solved.A few days before the shudderbegan, I added a fuel additive to my petrol tank after filling up, whichI suspect may have cleared any dirt and debris in the fuel system,however clogged an injector at the same time. As a last resort, I added astrong mixture of injector cleaner, which has solved the problem! Thecar is running like a dream, and had I known that this would be the curein the beginning, it would have saved me a heck load of money! Quote Link to post Share on other sites
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.