Anybody know the symptoms of a bad MAF?

I think you should see "Check Engine"light first and then when you connect a code reader it should throw you a code associated w/ MAF Sensor .

An engine with a bad MAF sensor may be hard to start or stall after starting. It may hesitate under load, surge, idle rough or run excessively rich or lean. The engine may
also hiccup when the throttle suddenly changes position.

An engine with a bad MAF sensor may be hard to start or stall after starting. It may hesitate under load, surge, idle rough or run excessively rich or lean. The engine may
also hiccup when the throttle suddenly changes position.

Yeah that was happening, the code was P0174. I replaced the MAF sensor and the "Check Engine" light is still on.... Less of the symptoms you mentioned but they still do happen but not as much.

uumm could it be the computer now? Should i delete the code so the computer will say "ITS FIXED" I can use it now, or is it totally another issue?

P0174 is Bank 2 combustion too lean. Did you check for air leaks at the intake manifold O-rings or intake tuning valves?

Read this post and all the links in it...

http://jaguarforums.com/forum/showthread.php?t=3726

P0174 is Bank 2 combustion too lean. Did you check for air leaks at the intake manifold O-rings or intake tuning valves?

Read this post and all the links in it...

http://jaguarforums.com/forum/showthread.php?t=3726

That thread is on the right track of my problem, Are there any pictures of where the intake tuning valves are at so i can replace them? Same with o-rings, I'm not that tech savy but I have done a lot of work on the car myself by **** load of research. If i know where it's at I can do it easily.

The tuning valves are the two big black things poking out the left side of your intake. Replace the "O" rings.

If that doesn't do it, you'll have to remove the intake and replace all the individual gaskets.

If it's the IMTs you will probably be able to hear a hissing sound. Also check the PCV hose for a bottom side split and the brake boost check valve for deterioration. Search the 0174 code on the forum and you'll get a ****load of information. Being an '03, if your X-Type hasn't had these three things replaced, they will need to be. The new IMT o-rings are green, the new PCV hose is "ribbed" (not for pleasure) and the brake boost hose has a heat sealed check valve.

If it's the IMTs you will probably be able to hear a hissing sound. Also check the PCV hose for a bottom side split and the brake boost check valve for deterioration. Search the 0174 code on the forum and you'll get a ****load of information. Being an '03, if your X-Type hasn't had these three things replaced, they will need to be. The new IMT o-rings are green, the new PCV hose is "ribbed" (not for pleasure) and the brake boost hose has a heat sealed check valve.

So the new IMT O Rings, i have to take of the intake manifold? Or is it the circle on the side of the manifold that I have to unscrew and put the rings in?

No the intake does not have to come off to replace them. Here is a pic:

http://www.jaguarforums.com/forum/showthread.php?t=16235

i have a problem with my car stalling, does this mean that i might be having a problem with my mass air flow sensor (http://www.autopartswarehouse.com/air_flow_meter%7Epop.html)? if it is, how much am i looking at?