Run a diagnostic test with a quality obd2 scanner, this will reveal any present codes and may give you a clear explanation for your issue. It could be an ignition module, crankshaft position sensor, camshaft position sensor, etc. If you've verified no fuel pressure that's a likely sign of a bad pump as you know. What happened? What are the exact symptoms and when did they start? Or did you wake up to it being like this after it was totally normal a few hours or the day before?
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SOURCE: 2002 Jaguar S-Type 4.0
this is a old model and it should have a cold start valve or it should have a coolant temp sensor, replace the colant temp sensor which is usualy located on the thermostat housing or on the intake manifold and this will sove the clod start problema!!
SOURCE: fuel pump relay 2002 Jaguar x-type 2.5
in the mass fuse box, under the dash, unless you have the manual you will not beable to tell wich one it is.. get a chiltons repair manual or a haynes...
SOURCE: Cranking but doesnt start, or intermittently not starting
My car does the same thing...sometimes it wont start....have to turn the key off then when I crank it again it fires right away. Possible that the in tank fuel pump pressure regulator isn't building to the proper pressure. Nissan did post a recall....under warranty *recall* I might add.... there is an updated pump that will cure the problem but since you most likely are out of warranty it will cast $400+ for the part plus labour if you can't install it yourself. Call nissan to verify if your car is affected by referencing your VIN with them. Dave.
SOURCE: how to test fuel pressure
I have been working on a simular problem on my daughter's vehicle. with the following additional symptoms. It only fails while hot. Runing fuel preassure checks, I noticed that the preassure rises from 30 psi while running to 40 psi after turning off the hot engine. This is caused by the expansion of the fuel in the rail. I believe that this hgh preassure is causing the regulator to stick closed preventing the fuel to get to the rail during a restart, (as the preassure drops to 0 while the fuel pump does whirrrr during the startup proceedure). It seems to free up after it has cooled then works normally. We ordered a new regulator but haven't received it yet to see if this fixes the problem. There is a possibility that the problem is a weak pump that cannot overcome the stuck regulator but since all the checks are in spec, I'm leaning toward the regulator at the moment.
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Thanks, and my apologies as the response was directed to the spam inbox that prevented viewing.
Will get mechanic to conduct test as advised and report back.
Cheers
Issac
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