I have a 2000 ford mustang that is having problems. I already replaced the fuel pump, fuel filter, fuel injectors, spark plugs and cables, and the coil but its still the same thing. As soon as you turn it on the motor starts shaking very bad. I also checked for vacuum leaks and its still the same thing. What have I missed?
-Sounds like blow head gasket, broken or burn valve.
-Do compression check each cylinder to see what you have and compare to its specification.
Or
-Was it recently rebuild?
If so then timing might be off.
spark plug wire connect to the wrong spark plug.
Vacuum line might connect to the wrong line.
Bad rotor or cap .
Good luck
Mai
Motor mounts can cause vibration . Which engine ? Stuck open EGR valves can cause misfire at idle . Faulty MAP sensor can retard timing at idle causing rough idle .
SOURCE: 2000 ford explorer 4.0 x-engine is stalling, missing and lose power while driving
I personally would check the fuel pressure. Then I would go back to the coil. I have seen brand new bad coils out of the box. The symptoms of a loss of power point to this component, especially if the car idles well, but loses power when accelerating. Please do not rate this reply - we all are left to grasp at straws since you have changed pretty much everything. Good Luck. Please post the final fix of the problem.
SOURCE: engine cuts out on acceleration
could be the pump or injectors or both. while your at it check your fuel tank for rust dirt any thing.
good luck
Jason
SOURCE: rough running, erratic spark
Run a compression test on the cylinders.If reading is low on any drop a little engine oil into the pot. If compression rises you have compession ring problems. Remove all plugs before you try this and place leads away from engine.
SOURCE: I HAVE A 2001 FORD MUSTANG GT THAT WON'T START, I
Before you go any further open the trunk and check the fuel pump roll over valve switch, mounted on the left side inside the trunk, push the switch down and try the vehicle.
SOURCE: vehicle came in for check
A misfire at idle that smooths out at cruise is ALMOST ALWAYS caused by a vacuum leak. Take a hard look at your fuel trims at idle. If the Bank 2 Long Term Fuel Trim is more than + a couple points higher than the Bank 1 trim, your problem is most likely a vacuum leak. If the Fuel Trims even-out while holding the engine at 2000 RPM for about 20 seconds, then a vacuum leak is DEFINITELY your problem. I would suspect a leaking lower intake gasket leak because an upper plenum leak will normally affect all cylinders.
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