hi guys..04 3.0 X-type 63,000 mls. The check engine light came on yesterday but the car drove ok. went out today and car is now bucking/cutting out at about 3 on the tach. any help would be appreciated

 

If it's limiting it's RPMS to 3,000K, I'm told that the car has gone into "limp home" mode. I would go have the code read at autozone or something as driving it with only being able to rev up to 3K seems quit dangerous.

 

i don't know if this is affecting it in any way...but it is 10 degrees F

 

Is the "bucking" rather violent? I have seen vacuum leaks (typically PCV tube/IMT O-rings/intake gaskets) and bad spark plugs cause this condition. Is the car fully warmed up when the fault occurs, or cold?

 

Agree about the vacuum leak
Before you spend any money getting codes read it has a good chance especially in this cold to have affected the PCV pipe which is a common problem.
Read this for how to fix in minutes at VERY little cost
https://www.jaguarforums.com/forum/s...ead.php?t=9913

 

thanks guys.. yes it is a violent jolt. driving along under low power shifts fine. when I start to put power to it just before shifting if jolts. also, in neutral when i hit the gas it sputters like hell around 2.5 - 3 on tach as I said

 

As said vacuum leak...check the PCV pipe

 

If you do not hear/find vacuum leaks, I would suspect and replace the spark plugs. Replace the intake gaskets while you are in there. I suspect you will find this to be your problem.

 

thank you all for your help. such a drag when the car goes down. will post tomorrow after I return from the service center

 

check these areas for vacuum leaks
before you start spending any money
it could be a nuber of things ...but these are the most common



















check these plugs are connected







if i remember correctly youll get a code like p0174....p1000

 

Mine turned out to be a fuel system, the exact same systems, includinfg the engine light, curise not availbe.

 

There are a numner of possibilities
We are just trying to show the EASY COMMON ones that dont need a code reader and are simple to rectify at VERY little cost

 

just under hood. pretty good hiss coming from left rear area of engine, actually think it has had a bit of a hiss for a while but not sure of what it was!

 

left rear hiss

 

Well, teh fuel system problem i encounter was caused by a major F-up on the old owner (my freind) who somehow caused numerous leaks int he fuel system. A good diagnostic for the fuel sysem is that your fuel economy will be giviving you very messed up reading, and your range will SUCK, the econmy and range won't be even close to wha the car is capable under normal conditions. So, don't panic yet lol. Sorry buck, didn't mean to scare anyone

 

MPG goes down with a vacuum leak too as the car goes into a default mode and overfuels as a safety precaution as it doesnt know how much air is going in

 

LR as you are sitting in car, or standing in front of it?

 

standing facing car, left rear of engine

 

Could be an IMTV Oring vacuum leak.

 

I had the hiss in the same area, so more than likely you have the same problem I did. Replace the IMT o-rings and the hiss will be gone..but as noted you might as well do the PCV hose too because you'll do it later if you don't do it now.