My 01 Jaguar XJR started having a rough idle.

Question edited for clarity and translated into written English.
Question moved from Ford to Jaguar category.

You should always take the upgrades. They are fixes to known issues.

All Diesel engines are slow to start as they need pressure and heat which happens after a few revolutions of the engine.

Rough Idle is normally because the Throttle Body and MAF need cleaning.

https://www.google.com/search?q=x+type+2.0+diesel+clean+throttle+body

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OBD-II Trouble Code: P0443 Evaporative Emission Control ...

www.obd-codes.com/p0443

P0443 - Evaporative Emission Control System Purge Control Valve Circuit ... P0443 trouble code symptoms could be just an malfunction indicator lamp (MIL) ... But, it's also possible to have a lean condition or a rough running engine if the ...Missing: jaguar ‎xj6

P0443 OBD-II Code and Check Engine Light - Jaguar Forums - Jaguar ...

www.jaguarforums.com > ... > XJ XJ8 / XJR ( X308 )

Feb 24, 2014 - Anyone have an idea on where to look for this? Jaguar® Leasing Deals.... P0443 OBD-II Code and Check Engine Light-xj8-purge-valve. .... Newby with air suspension fault, philwarner, XJ XJ6 / XJ8 / XJR ( X350 & X358 ), 7 ...Missing: 1995

Error code p0443..Think dealer is on crack - F150online Forums

www.f150online.com/.../287418-error-code-p0443-think-dealer-crack.h...

did u get the car fixed?

check plugs, wires and mag pack its what your plug wires go to from spark plugs. Im thinking bad plugs or one wire is bad

if its a v8 its gonna be your throttle body its a complete assembly and is a common problem on these models

use a gas additive every 40k to clean injectors/fuel system,suprising amount of s... builds up inside.

The fault is intermittent - strikes without warning - and I guess if there are no error codes - so the fault is beyond the reach of the computer sensors - change your high tension coil.

If you get just a click you should first check battery charge and all battery connections. The click is probably the solenoid kicking in but without enough battery to turn over the engine.

o2 sensors often cause a rough idle at stand still. Previously my xj8 had crank case ventilation (pvc valve essentially) issues that caused the check engine w/ restricted performance. I noticed a severe drop in gas mileage as well. Jaguar dealer fixed my problems in a few hours and it was surprisingly cheap. Its worth taking it to advanced or auto zone to see what the computer says. Then decide if you want to shell out for a dealer fix or if you can tackle it yourself. BTW, just to justify myself this is my third jaguar. I have a '94 xj6 with a chevy 350 inside it, previously owned a 95 XJ6 and currently have the xj8. They are wonderful cars if you can put up with their rough times.

Bought a use 03 last week for very cheep because it was idling rough, read in a forum about focus vacuum leaks and to use small burst of starting fluid to find the leak, spray around engine, if you hear the engine level off and run smooth in a particular spot for a few seconds the leak is in that general area, check the hose in that area, i found a large elbow on my pvc valve line was cracked in half, repaired with copper plumbing elbow fitting and silicone. now runs perfect. be very careful with the starting fluid short burst in well ventilated are.