Dpd light comes on but wont dispense and check engine stay on,engine rev is restricted to only 3000 rpm

Marvin

• 85242 Answers
• Posted on Feb 20, 2009

SOURCE: 1998 Jaguar XJ8 won't rev over 3000 rpm

have u ever replaced the fuel filter? sounds like low fuel pressure.

SOURCE: p1613 fault code & engine will not rev over

Crank sensor or engine speed sensor is faulty.

Fault:
Irregular power loss on accelerating
The speed of the engine is limited till 2500rpm
Frequent loss of crankshaft position sensor signal

Cause:
It is caused due to leaking from thermostat housing into crankshaft position sensor harness multi-plug

Remedy:
Check and clean the crankshaft position sensor harness multi-plug contacts. Rectify the engine coolant leak from the thermostat housing if found. Take a note of the engine coolant level and monitor it for changes, showing a leak is indeed occurring.

SOURCE: engine starts cutting out at 3000 rpm and wont rev up

fuel pump pressure too low.causing lean mixture .

SOURCE: engine will not rev above 3000 rpm

Inadequate fuel pressure, change the fuel filter first, make sure the car sits for at least two hours before replacing the fuel filter because these fuel lines are under high pressure during the time of operation. The pressure usually decreases over time in the lines but wear safety glasses just the same, I would recomend depressurizing the fuel system first, buy a Haynes repair manual for detailed procedure to be safe. If problem persists go to Auto Zone and ask them to check for trouble codes these codes if present may instuct you in detail to replace the MAF sensor or give you a code that must be looked up to find the problem.