Question about Cars & Trucks
I have 93 Thunderbird lx 3.8l. V6. It runs hot at times but not too hot. I live in arizona (very hot here) so i do run ac at times. When i run ac, the car has idled high above average, ever since it happened once it happened even without the ac on. i took off the iac and cleaned it out it did help but is starting to act up again. could this be a fan clutch problem? It will run hot slower without ac on. but when its on it happens within 15 minutes. Also when im sitting at idle with the ac on in gear the car shakes a little. The radiator was replaced not long before i got this car. theres no leaks and the hoses look good. when it runs hot the radiator makes a slight clicking noise. anyway i need help now before it gets worse. i dont want to spend 1200 dollars on a head replacement when it could be something minor. im diy guy and i need to know before the problem gets worse. thanks.
Sounds like thermostat problem. of course it will heat up faster if you run a/c because motor is under more stress. follow the big hose from radiator and where it goes into the top of engine is your thermostat
Posted on Jul 14, 2013
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Posted on Jan 02, 2017
hi i am dieter
here is something to try
keep some cold water with you and the next time it happens very quickly get out and pour the water on the crankshaft sensor then restart. If it starts right away without the usual two minutes than you will need to change this sensor. The sensor is easy to find you will see a wiring harness around the crankshaft pulley(the large one at the bottom the basically runs all your accessories like the p/s pump, alternator, water pump). Try to famaliarize yourself as to the location of the sensor first so that you can try to restart it within about 30 seconds.
Posted on Nov 28, 2008
SOURCE: Idle fluctuates
Its could be a few things. Most likely cause is you IAC (Idle air control valve) If this valve gets clogged up with carbon it will cause a idle surge on cold starts like you are describing.
Next your FITV (fast idle thermal valve). When the hot wax inside of this valve starts to wear it will cause a idle surge on cold starts.
Posted on Dec 13, 2008
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.
Posted on Mar 09, 2009
your fan is the problem...it's not turning fast enough to cool the engine off. I need more info on what type of fan you have....elec fan or a clutch fan?
Posted on Apr 24, 2009
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