The car has been sitting for about 6 month. Battery totally dead, had the battery replaced.
Has full tank of gas. Everything seems to be working fine.
The battery turns the engine over but the car will not start. Any ideas?

 

Firstly welcome to the Forum.

I suggest a repost in the S Type specific section where a lot more members will see it and have an answer for you. Not everyone comes in this section.

I also recommend giving the engine size, V6 or V8, as the issues for each a very different.

 

Welcome to the forum mikechinea,

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

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

 

While waiting for replies you could just use Search and see what was posted before as this is not that unusual.

 

Are the fuel pumps running when you turn the key to the start position?

You can also check to see if you have fuel pressure at the Schrader valve on the engine fuel rail.

It would also be useful to know if this is a 3.0 litre or 4.0 litre car.

 

I don't know about the states, but the fuel goes off very fast here in England. I believe most US fuels have 10% ethanol added same as the EU.
Ethanol pulls in moisture to the fuel if kept for a long time.
There has been a few motoring news articles about the problems with E10 fuel in vehicles and also about its compatability with certain cars.

I would recommend to change the fuel in the tank for fresh full fat stuff.

 

Thank you all for your support.

 

It's a 3.0

 

Is there fuel pressure at the Schrader valve?

Are there any DTCs stored in the system? If so, post them here.

Take a few moments to ensure all electrical connectors are correctly installed, such as the one to the throttle body. Also, inspect the wiring looms to the fuel injectors and coil packs for any damage.

 

Seized fuel pump...

 

Thank you all!! This is what I've found so far: Ignition OK, Voltage at fuel pump OK, No fuel pressure at Schraeder. My next step is to take out the fuel pump and test it.
May take a while though since I wore much younger man's clothes last time I work on any vehicle.

This may not be related but I found a 3.1 parasitic amp draw while troubleshooting.

 

3.1A is very very VERY BIG.

Ouch. Good luck.

 

Where is the source of this amp draw? Fuel pump? Check all relay(s) and see which one(s) are "hot" to touch and look at those associated circuits or the relay itself sticking..

That amperage draw should be easy to isolate to a hot relay...

 

Finally got around to fix the starting issue. With the help of my son we replaced the fuel pump and it runs like a champ. Even passed the California smog test.
On the parasitic drain: No luck. Battery and alternator checked by AAA, all good. Didn't run the car for 2 days, battery drained again. The drain now is 2.8 amps not the 3.1 as before. Will pull all fuses and relays, one by one as before, maybe I missed something.

 

Hello Mike. Congrats on fixing fuel pump issue. Your drop to 2.8A drain means you are now ONLY some 100 times over the <30mA limit. Suggest you review our write-up "Quiescent Current Drain" which you will find in the Miscellaneous section of the "HOW TO . . . " Sticky at the head of this forum. It sets out all the "sleep" issues and gives a logical test sequence of which fuses to pull and when.

Cheers and best wishes,

Ken