When i start focus 2001 goes to 3000 rpm, after about two minutes comesdown toabout 750 rpm,butwhen i put tran indrive or reverse the car practically goes on its own ,the rpmgoes up past a 1000, and thecar gradually increases speed without any accelarator input, i have to continually use my brakes.
Those IAC motors are specific to the engine and have a number on them that has to be matched.
SOURCE: 98 SaturnSL1 engin races in park and neutral engin lights on& off
Check your coils. Make sure that they are working properly.
SOURCE: 2001 v6 escape rough idle when cold
To update my earlier repair on the 2001 6 cyl Escape: When cold, and when the ignition was turned over but no accelerator pressure given, the rough idle finally returned the P0303 code again when the check engine light came on indicating that it wasn't caused by the plugs or the coil. FYI, I had replaced the intake manifold gaskets during the original repair and just prior to that I had replaced the fuel filter which was very dirty (I cut it open to see).
The repair manual referred to fuel injectors as a possible problem. I have run three tanks of fuel using different injector cleaning products and am very pleased with the results. Cold starts are much smoother and I am unable to coax out the P0303 code or any other code.
My opinion, change the fuel filter, use a fuel injector cleaner for a couple of tanks, change the plugs if the problem still exists. The coils were not the problem on my vehicle.
SOURCE: engine races hot or cold
It sounds very much like the idle air valve is faulty as I have just had same sort of problem I fitted a new idle air valve and it has cured mine. Unfortunately these idle air valves are not cheap. They are about £70 from ford but you can get them on ebay for about £30 from partsdome
SOURCE: once car is indrive the car will not go any faster
It is possible that the transmission filter and governor solenoid need to be changed. I have a similar problem. Try letting your Jeep warm up for about 15 minutes before you take off. This has solved my problem for now, but I know that I need to change the filter and while the tranny pan is off, going to replace governor solenoid.
SOURCE: i have a 1999 saturn sc1 1.9 lilter engine auto
Check and repair any diagnostic codes, Clean the Throttle body and IAC unit (Idle Air Control). Check for any vacuum leaks.
Unplug the electrical connector on the IAC valve located on the back of the throttle body near the firewall. No tools are needed to unplug the connector. Squeeze the release tab on the plug and pull to remove it.
Turn the ignition key to the run position but do not start it at this time. Unplug the electrical connector once again, and turn the key off.
Start the engine, and adjust the minimum air rate by turning the adjusting screw located on the throttle cable side of the throttle body until the idle speed is 650 rpm plus/minus 50 rpm. Turn the engine off, and plug the electrical connector back in--pushing until it clicks into place.
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