I need some help

I have a Jaguar x-type 2lt petrol

for two weeks theres been a problem with my car,
when the car is cold for 14 hours and i start, it starts slow.

What I have checked and What i have done and replaced to the car in the last ten months is in the list below:

Brand New battery
The starter is good it has good voltage, alternator is good and voltage is good.
fuel pressure is fine 4.5bar as it should be
vaccum is not leaking and neither is oil leaking from anywhere
spark plugs were changed 6 months ago in perfect gap. coils are fine, cables are fine.

ps for a few days i have noticed that if before starting the cold car i press on the gas pedal and release it and start up, it starts normal

then i thought it might be the throttle position sensor, i then changed the whole throttle body that i bought on ebay. but the problem is still there

I think there might be a problem in Crankshaft

what do you think it could be? what advice can you give me

The ECU is not giving me a code, when i attach the laptop to ecu everything is normal.

I have had jaguars for some years and have basic knowledge but some things one can get stuck

i have messaged you before perhaps you remember.

i have spent too much money and am sick of it


Thankyou

 

zibby, I sent you a PM. IN short, put the key in the II (RUN) position, wait a few seconds and then attempt to start the car. If it starts better, then odds are your fuel pump is starting to go. If the motor is rolling over slowly, I would be looking at the battery cables or the battery. Those are the common problems for that issue.

 

thanks thermo for reply
can you tell me one thing
on warm engine how much rpm should it be in idle? thats perfect? in this level what timing should it be? ignition timing? please tell me thanks

 

zibby, I am not sure of the timing, but in my car, the engine RPMs are right around 700 RPM. I am basing this off of the tach on the dash.

 

hi
i have x-type 2199cc
what rpm should st idle warm engine??thats perfect?? in this level what timing should it be? ignition timing?

thankyou

 

new update:
problem is fixed,there was a very small vaccum leak from inlet manifold. testing was very hard as there was no noise or visability, i even used carban cleaner. then i did the smoke test. I am not a smoker but i bought a packet of cigerettes and smoked 2 and and blew smoke into the hoses, then i saw a little bit leak coming. Where the vaccumm hose is attatched to inlet manifold there is a small ring there that locks the hose that was damaged. thankyou for reply