have a 1994 v12 have not started in 6 years (stored in warehouse ) like to drive. fuel was in tank . what must I do before a restart ?


94 xj
95 xj

 

Hi racedad05,

From your post, I assume you've tried the standard method of starting the car and it will crank but not fire up?

While the engine is cranking, does the tachometer read approximately 200 rpm or does it read 0 rpm?

Jag saloons require a very strong battery to start. If the voltage drops much below 11V while cranking, the Engine Control Module will not trigger the ignition to fire. So if the battery has been sitting six years without being recharged, it may no longer have what it takes to start the engine even if you've given it a full charge with a battery charger.

You can do the typical basic tests for spark and fuel pressure at the fuel rails. If you have no spark, suspect the battery is too weak for the ECM to trigger the ignition, or the ignition coil, distributor rotor/cap, or one of the relays associated with the ignition is faulty.

If you have no fuel pressure, the fuel pump circuit test procedure at the link below from Bryan N at the Jag-Lovers XJ40 forum has always worked for me. It applies to 6-cylinder cars, but should help you diagnose your system:

http://forums.jag-lovers.org/avsn.php?1480120m20

If you have fuel pressure at the rails, after 6 years I would assume the old fuel has gelled and gunked up the injectors. You may need to have the injectors cleaned (or do it yourself with a small investment of time and money):

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Welcome to Jag-lovers - Members Photo Viewing Page


I would assume you will need to drain the old fuel from the tank. Start by siphoning out as much as possible with an inexpensive fluid transfer pump (available at most auto parts stores):

http://www.summitracing.com/parts/wmr-w1145/overview/


Baffles inside the fuel tank usually make it impossible to siphon all the old fuel via the filler neck, so after you've siphoned out as much old fuel as possible, drain the rest by disconnecting the fuel lines from the bottom side of the tank.

Once the old fuel is gone, replace the fuel filter. It would also be prudent to replace other basic tuneup items such as plugs, wires, distributor cap & rotor, air filter, etc.

Corrosion on the battery power connections and ground studs is a very common problem, so you may need to go through and clean the most crucial ones. The photos and info at the links below show our '93 6-cylinder, but they should be at least partially applicable to your 12:

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Welcome to Jag-lovers - Members Photo Viewing Page
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Welcome to Jag-lovers - Members Photo Viewing Page
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Welcome to Jag-lovers - Members Photo Viewing Page


And since we're a friendly bunch around here, please visit the New Member Area - Intro a MUST - Jaguar Forums - Jaguar Enthusiasts Forum and post an introduction so we can give you a proper welcome and learn something about you and your Jags!


I'll look forward to reading the suggestions you receive from others.

Cheers,

Don

 

Pretty indepth procedure there Racedad, should get you going.

Nice one Don