Surging, stalling, overheating, check engine light flashing, loss of power

Fuel Pump is overheating and Stalling

odb1 code 42 could be a bad ground,be it a body,chassis,or engine ground.the only other thing it could mean would be for a transmission sensor gone bad,but i would check the grounds first.

CODE SCAN FOR FAULTY TPS SENSOR.IF TPS SENSOR BAD YOU WILL SEE CHECK ENGINE LIGHT FLASH ON.A BAD TPS SENSOR WILL CAUSE HESITATION DURING ACCELERATION. IF TPS SENSOR OKAY NO CHECK ENGINE LIGHT FLASHING. DIRTY FUEL INJECTORS AND STOPPED UP FUEL FILTER WILL CAUSE SAME PROBLEM.

You have very limited information listed. I don't know what year or model you have. Any way I would check fuel filter and perform a fuel pressure test to make sure your fuel pump is working correctly. Your vehicle may just be in need of a tune up. Does your check engine light come on? If so you need to have it plugged into a scanner or a code reader at the very least to find out why it is on.

A flashing CEL (check engine light) means the computer is recognizing a "catastrophic failure" in your emissions system, warning you of the possibility of severe damage to your catalytic converter(s). The power loss could be a number of things, but the knocking, combined with the flashing light, means there is a severe problem with one (or more) cylinders. Get your vehicle towed to a shop for full diagnostics.

I suspect you have plugged catalytic converter - hence the whistle. If you hook up a vacuum gauge to the intake manifold vacuum port, it will be low, like around 10 when it shoul dbe 17 incehs of vacuum.
Was you check engine light flashing? If so, too much raw fuel getting in converter overheating it.

Change the Mass Air Sensor it is dirty should solve all your trouble

the 2.7l has a sludge problem. This could cause the stalling and loss of power. There's a few fixes, the new water pump (which is part of the problem) doesn't dump coolant into the oil pan. Easy way to check is to simply drop the oil pan.

Check your converter on your exhaust when it's running and see if the noise of rattling is coming from there.If it is you have a plugged converter,it's broken up and in piece's which will make noise and no power especially when calling for power.Be sure to let exhaust cool before repair is done.If the engine is making the noise like a knocking sound you should bring it to have it checked.Hope this help's.

IT LOOKS LIKE YOUR FUEL PUMP IS GOING BAD