Ok I have an xj6 94 I think. We had an air leak at #5 injector we removed the rail and resealed It. Now it cranks but will not start. It begins to fire off but won't. I've checked spark we have spark. I think we have fuel I'm not super sure I'm a Benz tech I've never touched a jag before please help thank you

 

You are NEW, so welcome to the real world of motoring.

OK, same principle. The badge on the front matters little, it is an internal combustion engine, nothing much has changed since inception. Air/fuel/spark, it runs.

Are the spark plugs wet/damp after this cranking episode you have just described????

Fuel at the rail is obviously required, soooooo, crank it again, it wont run as you say, after 5 seconds, stop, CAREFULLY crack the 2 nut fuel line connector at the rear of the rail and observe the fuel in that area.

FUEL SPILLAGE WILL OCCUR SO CAREFUL PLEASE.

A good SPURT means you got fuel and pressure. So maybe NO injector pulse. Crank angle sensor perhaps.

A DRIBBLE means NO GOT, so pump/filter/relay are on the hunt list.

The fact I read into your scribing, it WAS running??, although NOT right, has me thinking something has been disturbed in the rail removal.

There is a crank angle sensor at the front at about 11 o'clock on the timing cover, and they do/can just go legs up.

The year exact would be helpful, as you are right at a change point with '94. If it has a distributor then XJ40, if a whizzy sensor, then X300, very different system (Nippon Denso).

Lets know.

 

Ok yS it was running poorly as in it had an off idle hasitation as I manipulating the the throttle by hand slowly it would choke bout but quick revs it would run. It has a distributor

 

Ok I got it to run I sprayed starter fluid into a vac line and it fired off an ran but it does at idle I don't have fuel pressure so it's a either out of gas b bad relay c bad pump

 

OK, XJ40 is what it is known as in Jaguar world.

Mmmm, out of gas will do that every time.

The fuel pump on that model is "inside" the fuel tank, and a mongrel to change. The pump should be heard to "whir" as the ignition is switched ON, and that is always a good sign, but NOT 100% the pump is OK.

The filter is inboard of the LHR wheel area, and easily seen from under the car.

Once all that is sorted, the TPS is then a suspect in the hesitation issue. Mainly due to simple old age, and then the ingress of oil from the throttle shaft thanks to gravity and maintenence slackness.

 

Kris,
I've moved your thread to the XJ40 section.
Please take time to visit
New Member Area - Intro a MUST - Jaguar Forums - Jaguar Enthusiasts Forum
so we can say 'Hello'

 

Kinda doubt, and find it hard to believe that a declared Benz Tech would be thinking that the vehicle was out of fuel and posting this to an open forum.

First check on any possible fuel related problem, is there any fuel in the bl**dy thing!

If not......

Grant is the EXPERT so follow his advice first, but I'll also throw in a possible Link Lead meltdown.

Well documented on here, and personally experienced.

 

I don't care what you think or doubt translator this car is an old pile of s it is not mine it is a friends car ad they refuse to put fuel in it saying it has fuel.