2004 chysler pacifica at random points when driving it wont let me go over 2500 rpms

Cud b worn or wiring corroded. Vacuum hose may b loose

Get a code scan done at an autoparts store. They are free.

Was the PCM reset after these parts where replaced, if not do so.

At dealer.

Owners & Service Manuals - Chrysler - Cars & Minivans

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Personal experience says you have a wiring harness that is grounding out and causing the codes...This is especially true if you have had the typical motor mount issues that are common on the Pacifica...Check the wiring harness behind the drivers side wheel...


Remove the front left wheel (drivers side)
-Remove the wheel well shield (just the front is all that is necessary...fold it back)


-Verify the vehicle ground is still intact (when the motor mount gives there is not enough slack in the ground wire and the wire will pull out of the grounding lug)


-Inspect the wiring harness that is around the transmission that goes to the PCM (when the motor mounts give they can crush and then rest on the harness and wear through the casing and then affect the individual wires...throwing codes...)

`The water pump is inside the timing cover and is run by the timing belt. If the water pump has been leaking I would also replace the timing belt and check the belt tensioner carefully.

Your Pacifica 2004 has a 3.5L engine 6 cylinder, you will need six spark plug's, the spark plug gap is .050", make sure you gap the spark plug's before you install them, hope this was very helpful.

solder it together and heat shrink or electrical tape

Spray with tb cleaner and scrub with tooth brush respray.Needs to be done every 6 months on Pacifica