DerekJ Posted July 9, 2012 Posted July 9, 2012 Hi All, Anyone got any experience of turbo diesels? The turbo lag on my 2009 2.2 X-Type Jag seems to be getting longer and longer. It's now a matter of count-to-two from a standing start before it moves and I'm sure it was not as long a few months ago. Once moving it drives well with no fault codes or warning lamps showing. Cheers Derek Quote
CL290005 Posted July 9, 2012 Posted July 9, 2012 You may be getting the Variable vanes in the turbo sticking as they get gunged up, if it is then the turbo would perform better if its cleaned, the next thing that generally happens is the car drops into limp home mode and switching off and restarting clears the fault, it does not show warning lamp fault (at least in my VW range it does this). By the way if you get this most dealers diagnose a new Turbo! Quote
jay.perry Posted July 9, 2012 Posted July 9, 2012 A mate of mine just had a similar problem with his Mondeo ST 2.2 turbo diesel,which is the same engine. It was showing EGR valve fault and M A F sensor fault when plugged into code reader. It turned out to be the EGR valve.He cleaned it out with carb cleaner and it was slightly better for a couple of weeks but then went back to how it was.He got a new one from Jaguar ,as they wanted £120 and Ford wanted over £300! Quote
stu999 Posted July 9, 2012 Posted July 9, 2012 Are you giving it a good caning every so often? At the end of the day, it is a truck engine ( ) - and needs working every so often. Take it to the limiter a couple of times every thousand mile will do it more good than harm. Pootling about blocks cats/DPF's, and will slow the engine / turbo response with it, exasperating the problem... Quote
Dibby Posted July 10, 2012 Posted July 10, 2012 I love diagnostic by internet. So it could be the turbo vanes, maybe a new turbo, or an EGR valve, or the MAF sensor, maybe even a cat or the DPF. Anything we can add to the list? Turbo vane actuator? Wastegate? Take it to a garage mate, all you'll get off the net is a list of guesses it might or might not be and you'll be none the wiser until you get it looked at properly. Quote
Man On The Clapham Omnibus Posted July 10, 2012 Posted July 10, 2012 I have a 2.2 X-Type (2007) and it is pretty lively with little or no lag discernible. A split hose between the turbo and the manifold could have this effect if my last car's experiences are anything to go by. The main difference between yours and mine, though, is that I have no DPF. I deliberately looked for a pre-DPF example to avoid trouble with it. Quote
stu999 Posted July 10, 2012 Posted July 10, 2012 I love diagnostic by internet. So it could be the turbo vanes, maybe a new turbo, or an EGR valve, or the MAF sensor, maybe even a cat or the DPF. Anything we can add to the list? Turbo vane actuator? Wastegate? Take it to a garage mate, all you'll get off the net is a list of guesses it might or might not be and you'll be none the wiser until you get it looked at properly. Quote
DerekJ Posted July 10, 2012 Author Posted July 10, 2012 Thanks everyone. Diagnostics over the Internet may well not give the correct answer but I always find that the WSCC collective always comes up with a lot of good advice and MOTCO may well be correct as the DPF warning popped up today. So it looks like a good thrash on the motorway this weekend. If that does not clear it then it's off to the garage. Cheers All DerekJ Quote
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