Hello
My 2001 XK8 battery went low again after 2weeks off the charger, with anti theft engaged. Last time (with members help) I charged battery (12.75v on meter) and did a hard reset(ground to positive with Key all way on) started right up This time however no go. ,charged back up , performed reset, turns over great but not a hint of start, I wonder if something could be causing it to not reset correctly since even after several hours with the battery disconnected on charge ,the radio does not go to reset and I do not see any unusual display when I first turn on the key as the owners manual suggests.
I should note that during this last down time I did open the air filter box to check if needed replacement filter (only had her a few months and am attempting to familiarize myself with maintenance items) and have since checked the MAF sensor to make sure I correctly reattached. I do not have a code reader yet, but reading posts over the last few weeks by other members , looks like getting one is a must have item with this car, any initial thought help , appreciated


Jeremy

 

I am not understanding the “anti theft engaged” are you saying the alarm was set? Are you seeing the security light flashing on the console? Is the engine turning over just not starting or it will not turn over?

 

Hello Gus
I kept the Alarm sys on while in Garage, I read that this was correct way to leave and conserve battery power, and yes engine turns over very well
Jeremy

 

If your fuel pump has not been replaced, start with checking the pressure at the schrader valve on the fuel rail.

 

thanks just checked to see if fuel present at valve when turning over ,held valve in and cranked , no fuel does this mean bad pump , checked fuses and ok

 

You should have fuel pressure at the rail when the ignition is on - can you hear a whirring sound(pump running) for about 4 or 5 seconds after switching on? These pumps have a reputation for failing when the car is unused.

 

Thanks Yes heard something Up front when key turned on, Not sure yet where pump is located. would think in rear? and will have to listen again

 

Unfortunately, the pump is inside the tank and looks like you need one.

 

thanks will take a close look at electrical for pump tomorrow

 

This might help you in checking the fuses and relay for the pump

Link JagRepair.com - Jaguar Repair Information Resource

 

Gus - in the link to Jagrepair.com regarding testing fuel pump fuses and relays it says:
"If all the fuses are good swap out the relay in the fuse box and see if that fixes the problem. If not pull the relay and check voltage with the key on at position #2 you should have 12v & position #1 you will have 0v and at position #3 a constant 12v. If this checks out get ready to jump position #3 & #5..."

Well I assume "key on" refers to accessory position (lights on dash) so when I did this I tested 0v at all positions EXCEPT #1 where I got 12v ! (Also I received 12v on fuse #3 and 0v on fuse #7 - both fuses had been pulled previously and examined visually an tested at Zero resistance.)
Can I assume my fuel pump is bad? (Did not try to jump #3 and #5 to listen to fuel pump after receiving these results on relay socket.)

(Brief History: 2001 XK8 42K miles. Trying to restart after sitting for a year after misfire condition that I diagnosed as oil/water in back SP wells in each bank (1 on right side, 2 on left side also water on left side). Replaced camshaft cover gaskets and squirted a little Marvel Mystery oil in each cylinder before installing Spark plugs.
I siphoned as much old fuel as I could out (8 gal) and replaced with a couple of gallons of fresh - gauge on dash reads 1/4 full). Trying to start I found little to no fuel at Schraeder valve (dribbled out some after strenuous restarting) and before reading this warning against using it, was able to start for a second or two using a little starting fluid.