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Xara: twice in the last 2 weeks while driving i have experienced…

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twice in the last 2...
twice in the last 2 weeks while driving i have experienced a lack of power, an increase in teperature and vibrating of the steering wheel. help.
Submitted: 3 years ago.Category: UK Car
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Answered in 9 hours by:
6/18/2015
UK Auto Mechanic: Matt, Mechanical Engineer replied 3 years ago
Matt
Matt, Mechanical Engineer
Category: UK Car
Satisfied Customers: 23,486
Experience: BEng hons Mech engineering, in auto industry 22 years
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HelloI'd 1st consider changing the fuel filter as if this partially blocked this too will reduce pressure. If OK then also check the connections to the EGR valve, if either the vacuumpipe of electrical connection are damaged / corroded then the EGR can be on alltime which certainly will hurt performance. Its also possible that its a faultwith the EGR valve so its worth removing the valve and cleaning it out withbrake cleaner, if it looks particularly clogged then replace it. If this is OK thencheck the small vacuum lines to the turbo and its connected control solenoid onthe bulkhead, any cracks or leaks can give turbo issues and its best to havethe boost pressure measured actually measured with a boost gauge to check thatthe turbo is healthy and that the sensor is reading correctly If its a variablevane turbo (they’ll be an actuator on the turbo body - but not a wastegate)then check its vacuum pipework as above and check the connections to thediaphragm / solenoid valve Also worthchecking that the glow-plug relay is switching off as they can stick on andleave the glow plugs also on - on some cars this can force it into limp home Also worthconsidering adding a bottle of injector cleaner into the tank as a cloggedinjector nozzle will reduce power andgive poor combustion - the next stage on from this is to remove all theinjectors and have them ultrasonically cleaned and flow checked Also check all the high pressure hoses post turbo/s for any split hoses or cracked metal pipes,also check the ends of the intercooler as its not unheard of to pop the endcaps off under high boost.
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UK Auto Mechanic: Matt, Mechanical Engineer replied 3 years ago
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