I am still trying to solve the issue of the engine stumbling and stalling in my 94 XJS.
I will update for those who haven’t seen my earlier posts.
4.0L 94 XJS coupe, 50,000 miles +
Ran fine until a little while after I changed the fuel filter, which was probably original.
Has had the full 50,000 mile servicing and tune up.
New water temp. sensor, oxygen sensor, throttle position sensor, crank position sensor, cap, rotor, plugs, wires, valve cover gasket.
Tested to make sure they are okay: ECU, injector ECU, and a couple other ignition parts have been replaced.
I let the car sit for a while after bringing it home on a trailer from a mechanic that couldn’t sort it. Today I decided to put a battery in it and try to start it. After cranking it three times, which isn’t normal, it started up. I let it run for a couple of minutes and took it to 3000 RPM, fine. I dropped it back to idle and let it run. It ran for about five minutes, stumbled and stalled. It then wouldn’t stat back up. I have a fuel pressure gauge in line and it was bouncing a little but stayed right around 36 PSI while it was running. When shut off the pressure started dropping and I assume will go to zero in short order. The car has been gone through extensively with no cure to the issue. There is no one anywhere reasonably close with the needed Jaguar diagnostic equipment. I plan on removing the injectors and have them serviced and tested. Not sure where to go from there.
Any helpful insight will be greatly appreciated. That includes referral to someone that has the skillset and equipment to sort this out.