Vapor lock is when gas boils in the fuel line and the vapor or air pockets cause cutting out and stalling.
Never owned one but maybe your car is Vapor locked...It's when your gas tank pressure becomes greater than your fuel pump..It's caused from years of over filling your gas tank...Your car is designed to burn vapors. But gas goes down the line instead and clogs up your canister meant to filter fumes...Then it builds pressure up in the gas tank. When the pressure in your tank becomes greater than your car...It shuts off and want start back until the pressure has gone down...If this is the problem just loosen your gas cap...it releases the pressure immediately...You usually will hear a suction sound when you open your gas cap....Hope this helps...It could be the problem...maybe not...But something you might not think about or know
SOURCE: 1989 jaguar xjs v12 fuel mixture
Chances are the coolant temperature sensor or its wiring have failed, or the vacuum line to the MAP sensor is leaky or broken (I believe the V12 in '89 guise uses MAP sensors). The MAP sensor measures Manifold Absolute Pressure. Along with this pressure the ECU looks at engine RPM. It also measures air temperature. Knowing pressure and temperature we know density, and knowing engine speed tells us how much volume of air is going through the engine. All of this together is computed into air mass and is used to calculate how much fuel mass should be admitted. If the vacuum line is broken, the ECU reads less vacuum and produces rich mixture thinking that the engine is under high load.
SOURCE: no power to fuel pump
If you tested the pump with another equal voltage source then the pump is bad and needs replacement
SOURCE: No oil pressure what so ever in v12 jaguar
have you tried reversing the pipes and see if that makes any difference other than that there must be a pressure difference between the two pumps try priming the filter with oil before starting.
SOURCE: I have a 1986 Jaguar XJS V12. I'm trying to remove
There are two 13mm bolts in the back window under the carpet that have to be removed. Remove the two plastic screws, Remove the carpet and find the two 13mm bolts..
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jaq xjs
Hey, I have 1990 xj6 sovereign and im having the exact same problem. Plus the car wont start when its warm, i can drive it for a long drive perfectly and cut it off and it wont start again. The engine will turn over but not start. If I let it sit for about ten minutes then it starts up fine. Any ideas?
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