Jaguar xjs 1995 v12 engine lack of power - 1995 Jaguar XJS

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 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.

Colin Stickland

• 22516 Answers
• Posted on Apr 11, 2009

SOURCE: Jaguar XJS Dead Battery, Trunk Won't Open

jumper lead point under bonnet

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..

SOURCE: p0411 1995 jaguar xjs

secondary air injection system incorrect downstream flow. this has to do with the air pump that is driven by one of the fan belts. if the check valve is not operating or the one way valve is burned through. it will trigger this code. check the valve on each side of the exhaust if v12(one on each part of manifold in L6) and remove the hose and start the engine. if exhaust flows through replace the valve/s. this can also be triggered by excessive moisture build up inside the pump and then freezing overnight not allowing the pump to rotate(pump).