Yesterday my 2001 xk8 started fine, ran great for 20 miles. When I parked it and came back 20 minutes later to start it it ran very rough, idled about 500rpm and died about 20 seconds later. Couldn't get any higher rpm when I step on the gas peddle. It kept doing this every time I started it. Never had this problem. 3 hours later wouldn't even start. Had to get it towed home.
A couple weeks ago it was throwing codes, misfire on all the cylinders. I cleared them out and ran fine.
Could it be the fuel pump or what should I look for?

 

The fuel pump is a possibility, but I and probably many others are not very familiar with the X type. Try posting on the X400 forum which is correct for your car.

 

The op is asking about his 2001 xk8 in X100 (xk8/xkr) forum, seems correct place to ask.

 

Do you have fuel? Sounds similar to problem l had a while back when my fuel level sender packed up, was showing fuel but tank was actually empty.

 

I agree. Check fuel pressure!!

bob

 

Don't know how I missed the XK8, just saw the X type in the signature. There is a schrader valve (tire valve) on the fuel rail. Turn the ignition on and depress the valve stem.

 

Just went through this with my 2000 coupe. Backed out of garage with car running fine, did a couple of things (maybe 5 min) then got in and it was exactly as you described - barely idling, any application of throttle made it die. Fuel pressure was varying 20+ psi when checked. Replaced the fuel pump and filter (and some other needed work) after which all seems good. Throttle response and power seem notably better too, making me think the pump has been on it's way out for a while.

 

Hi, I have exactly the same problem (2009 x type 2.2 diesel) engine starts then chugs and stalls. You don't say if your cars are petrol or diesel, so which are they ?

How did you guys solve the problem please ?

Thanks
Harry

 

These are petrol with a very few propane in England/Continent. But even those start with petrol, I believe.

 

You are probably better off posting in the X type or the diesel variant forums Harry.
All xk8 and xkr's are petrol v8.