I have a 1992 ford tarus it idles fast and will not rev up I have changed fuel pump and filters and also changed plugs and wires when you give the car gas it rev and go back to idle even with gas peddel on the floor

Check the fuel pressure at idle. Did you replace the fuel filter? They can be restricted,mimicking a bad fuel pump. Does it have any codes? don-ohio

If it runs good in park or at idle but is slugish when you try to accelerate it is likely a fuel issue. I would start with a new fuel filter. When you press on the gas you need more fuel pressure and if the pump cant get more through the clogged filter you will get that. If it runs bad even at idle it is likely a spark issue and needs new plugs and wires. I would give it a good tune up - oil change, spark plugs (platinum or iridium), plug wires, air filter, fuel filter, PCV Valve and see how she runs after that.

check fuel pump pressure- fuel filter --air filter --egr valve if carboned up clean or replace and cat converter feel the exhaust if feels restricted may be clogging up

Sounds like it could be a fuel delivery problem.Check the fuel pressure it should be 35-45 psi with engine running.If its not within these specs then replace pump and filter.

You have two coils on this engine. Test each wire for spark with the engine running. You'll find at least one wire not sparking. replace the coil that has the wire that's not sparking.

Check the spark plug wires... idle after dark... look under hood, rev it up and see if you see any spark jumping from the distributor or wires to plugs.

Check the fuel filter, may be plugged allowing only enough fuel to idle. Electric fuel pump may be shutting down, oil level full? there is a corrolation between the two I believe.

There are several problems and they are all related. Check plugs if they a white with gray ash buildup. Gap .054

1. Fuel pressure regulator, if it is ruptured fuel will be vacuumed straight into the the intake causing idle surge also in causes temperature fluctuation and poor performance. It will also cause lean running condition.
2. The Mass Airflow Sensor also has a huge impact on mixture, defective symptom was a knocking and clattering under load especially uphill. Cleaning will only give temporary fix.
3. Spark Plugs- Do not use Platinum plugs they run hotter than standard plugs!
4. Any intermittent starting problems are likely fuel pump related, when you turn the key in the ignition you should hear the pump running!!
5. Preventive maintenance is the key change your fuel filter at recommended intervals.

I have a 94 Explorer, it run very poorly after changing these items it runs great, restored power, idles great and great mileage again and finally no more temperature fluctuation.

Check your fuel pump, fuel pressure regulator, EGR valve, IAC(Idle Air Control Valve) and your spark plugs and wires.

run a presher test on your fuel pump.check your fuel filter. have nice day

check fuse that controlls fuel