4g93 gdi engine starts wont rev above 3000 rpm-starts misfiring cuts off as i mash the x sounds like starving for air scan tool once said fuel rail sensor swapped - air flow sensor, fuel pump & fuel pump (tank) is there a fuel pressure boost pump on the engine? I have this exact same problem, what is the solution?

check fuel pressre

Replace the air filter and IAC idler air control valve.

The 4.0 and the 5.2 engines are dauntless. I expect something external to the engine such as I've listed

Have the OBD scan checked for engine error codes!!

1. Very dirty air Cleaner/Mouse nest in air box
2. Dirty fuel filter -starving for gas
3. Failing Fuel Pump
4. In tank fuel filter
5. Plugged catalytic converter

Have the fuel pressure checked

Jaguar wont rev 3000 rpm Questions & Answers - Fixya

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1998 Jaguar XJ8 won't rev over 3000 rpm ... Wont go beyong 3000 Revs s type 2001, wont go beyond 3000 Revs and it' in limp ... Question about 2002 X-Type ... My jaguar xjr8 year 2000 battery went dead started car went for short drive back ...

Jaguar engine cuts 3000 rpm Questions & Answers - Fixya

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1998 Jaguar XJ8 won't rev over 3000 rpm ... engine cuts out and shudders at 3000 rpm won't accelerateobd code p0332 2002 jaguar x type 3.0 l P0332 - Knock ... Car is boging out in park and will not go over ... driving, don't worry about it.

Rev Won't go up

www.jaguarforum.com/showthread.php?t=14662

If your in park or neutral, the PCM stops the engine from revving up to high. If your driving, then the fuel filter is clogged up.

diesel? won't rev above 2k is because it's being fuel starved , ck filter ,.lift pump , injector rail pressure reg.

I have a 2002 Lesabre with the 3.8 engine. Mine started running really bad. The code was random engine misfiring. I changed plugs, wires and a few other parts with no success. It ended up being the ignition control module. It sits under the coils on my car. Cost around $150. Mine went bad at around 110,000 miles.

sounds like the fuel pump in the tank ? without seeing the vehicle myself i cannot tell you anymore .

Check & replace ambient air temperature sensor

Hi it sounds like your high pressure pump needs replacing. the pump can be repaired but you will have to find someone who knows about it, i fix a lot of them before. there is a spring that pushes out the piston in the pump so it can compress the fuel that spring losses its ability to extract the piston back out. i have pictures of one if anyone wants to see