jaguar e type 2.1ltr 2003 model. when moving off from standing position the response from engine is a delayed reaction, if you add pressure on accelerator there is a surge which isn't smooth at all. The problem is continuous either moving slowly in traffic or stationary. if anyone can inform me on how to resolve this issue would really appreciate it.

 

Sounds like it could possibly be a sticky throttle valve. You might need something like the 3M Fuel System Cleaner:
https://www.3m.com/3M/en_US/company-...3242400&rt=rud

 

Zildjian48, use some throttlebody cleaner (at this point, can get away with carb cleaner) and clean the inside of the throttlebody. See what you have then.

What you will do is remove the intake where it attaches to the throttlebody. Then using a finger, hold the throttlebody open (ensure engine is off at this point) and spray into the throttlebody. If you see brown, use the can to wash it away. Make sure to spray the edge of the silver disk that you pushed open and to spray the point where the shaft goes through the body of the throttlebody.

Once you have things pretty clean, use a rag to wipe the inside to pull anything that may be left. Reinstall the intake. You will then get into the car and before you start it, depress and hold the gas pedal all the way down. With the gas pedal depressed fully, attempt to start the car. It may take a few seconds, but you should hear the car start to spit and sputter as it is attempting to start. Start easing off the gas to allow the engine to come up to idle.

In short, spraying the cleaner into the engine has flooded the engine. So, it is going to be very difficult to start. By depressing the gas pedal all the way to the floor, you are telling the computer to cut off the fuel injectors. This will allow only air to move through the engine, pulling what has flooded the engine out. As the flooded condition is about clear, the engine will be able to start firing properly, leading to the engine spitting and sputtering. Backing off on the gas pedal will now allow fuel back to the engine, allowing it to run normal. You may have to play with the gas pedal some to get the engine up to speed, but it will come up.

Also, do not worry if the check engine light comes on. It may come on following this as it will see the car running too rich and it will trip the O2 sensor codes (P0420 and/or P0430). After a few normal runs of the engine, the light will go out on its own. If you are truely worried about it, you can momentarily remove the negative battery cable to clear the check engine light. If you do this, then you will also need to reprogram the one touch features of the windows.