I have a 2003 xtype 2.5 liter. the car has a rough idle when cold. the codes are telling me a lean mix. where is the temp sensor on the radiator? Help

 

Welcome to the forum paullikesthe water,

I've moved your question from General Tech Help to X-Type forum. Members here with the same model will be able to help.

When you get a minute, please follow this link New Member Area - Intro a MUST - Jaguar Forums - Jaguar Enthusiasts Forum to the New Member Area - Intro a MUST forum and post some info about yourself and your vehicle for all members to see.

In return you'll get a proper welcome and some useful advice about posting to the forum.

Graham

 

Hi Paul,

I've posted a diagram from a parts supplier, Welcome to the forum and I hope this helps?
Regards, Stu

2002 Jaguar X-Type Parts - Warren Henry Jaguar Parts

 

Paul, this problem is normally associated with 1 of 2 issues. The more likely issue is you have a cracked vacuum hose. Specifically, the breather hose that goes from the front valve cover, through the PCV valve, to the elbow on the intake. This is about a 3/4" hose and odds are, you have a smooth hose there right now. Feel on the under side of the hose where it goes up and over a bracket designed to hold the hose off of the engine. The under side of this hose is known for splitting the length of the hose and causing poor engine performance. If you have a ribbed hose (it will be obvious, if you are wondering if you do or don't, then you don't), then odds are you have another issue.

Issue two is most likely dealing with a dirty throttlebody. You can remove the intake hose and using some throttle body cleaner (not carb cleaner), you can spray away anything that is not silver/brass in color. Make sure to get the edge of the butterfly valve (the big metal disc blocking the air passage) as this can get build up on the edge and cause the valve to stick in a position. Just a side note, cleaning this may cause the car to be hard to start the first time after doing this. So, what you will want to do is to get into the car and then depress the gas pedal as far as it will go and then while holding the gas pedal down, start the car. The "flooring" of the gas pedal actually tells the computer to not admit any fuel to the engine since it is flooded. Once the engine starts to catch, you can feather the gas pedal and it will come up to idle.

From here, lets see what you have.