Had a few codes come up along with the "Restricted Performance" message on my 5.0 XKR: P0054, P0300, P0301, P0303, P0307
Running lumpy and rough as anything.
It's being taken to a Jag specialist tomorrow. I just like to know what I'm going to expect. I've read a few forum posts about the Cam tensioner and guide issues. If these failed would that mean I'm looking at a new engine?
Thanks in advanced

 

Most likely fuel injector problem. Many of us have had the same issue and replacement of bad injectors gets it back to perfect in no time.

 

Okay, that gives me some hope, it had a black cloud of smoke before these codes, will the SDD show up if it's injector related?
Thanks in advanced

 

You didnt run the tank down did you ? SDD should show up the problem yes

 

Weird thing is though, if you have ONE fuel injector go bad, it starves fuel from the other injectors on the same bank and therefore you'd have either all odd or all even misfire codes. You have Misfire codes for cyl 1, 2 and 7. P0300 is General misfire.
The P0054 points to a bad O2 sensor, which COULD cause cylinder misfires, but maybe not.
It could be O2 sensor, plugs, coils, or like was mentioned, an injector or two.

 

You misread its cylinder 1, 3 and 7. Offside bank..
I replaced the O2 sensor and that cleared the o2 sensor code, but the misfires are worrying me and the dodgy running if the engine

 

it was low, about 18 mile range. But not drained

 

No, don't think I misread. Could have been a Typo by OP though. That would make more sense.

 

Yeah sorry, that was my fault, it's been edited now. I apologise

 

I did run it on bad fuel as that was all i had near me at the time. It's mapped to V power and i put 95 in. Im hoping i havent damaged anything

 

Open up your oil filler cap and take a deep smell right from the hole.... if an injector is stuck open (usually the case) there will be a distinct strong odor of unburned Petrol from too much injected into the cylinders and not burned. It bypasses the rings and ends up in the sump.

 

I haven't run the engine in a while, shall i start it up first before i do this?

 

No! If you have a problem of any sort, running the engine will only make it worse!

 

Sounds same as what i had . blocked injector and car stank of petrol . Hope you get it sorted cheaply

 

I had to drive it to my local specialist, it wasn't far and i didn't go above 1.5k rpm. And it stunk of petrol on start up

 

Yours was missing on 3 cylinders?

 

What happens when one injector is stuck open is that it dumps fuel into that one cylinder constantly. What THAT does is reduce the pressure in the high-pressure fuel rail that robs the other injectors on that rail of available fuel, so therefore basically all the fuel for that entire bank of cylinders goes into that ONE cylinder.
I had one bad injector but I had all four on that side replaced since it was like $1500 for labor to get to them. Plus parts. Plus I had a few other things done since Already in the Shop.

 

Ah right, that makes sense, I hope it's just the injectors then! I'll keep you posted on what is found out
Thanks guys

 

pauleddy,
I'm surprised you could drive it any distance. On both occasions that it happened to my car, it misfired so badly and put out so much blinding grey smoke, it was undrivable. But, a day later is was purring like a kitten again with the fuel injectors serviced. CeeJay's explanation is spot on.

 

Mine had went into restricted performance mode after i stupidly had run the tank down much like the op has . i then filled it up next day and set off for work . on way back near home car goes into Rpm and sounded bad stank of gas and was getting multiple misfires codes etc in the end it was merely down to 1 injector being blocked had picked up bit of crude from bottom of tank . injector was cleaned and all well since