I have a '02 Lincoln Ls with 77k miles. Since last July (08) driving home on highway it started overheating. Took it to my regular mechanic as check engine light was on and he told me that I had a blown head gasket. Apprently, the computer told him that there was a misfire in one of the cylinders. Took it to second mechanic... He tested the block and determined that there was no blow head gasket. Replaced the hydrulic fan, changed hydrulic fluid/oil, serviced the cooling system, changed the thermostat and basically told me it has him baffled. He could not find anything wrong with the car! Took it to the local FORD dealer, (yesterday) was told that there was a air pocket in the cooling system so they bled the system. It did not fix the problem. The car is still overheating. Yet it is only intermittent, and no check engine light appears. I have put alot of money into this car and still have the problem. I can tell when it's going to overheat as there is distinct sound like a whining noise from the fan area and boom it overheats. I have to pull over or turn on the heating system to help bring the temp down. Today it happened on the highway I pulled over, turned the car off, waited 5 minutes and the cars temp was back in the normal range. I am completely frustrated and need help. Any help you can give me would be so appreciated. Thanks I'm having a similar problem but mine never has a check engine light or overheat light or anything. The fan just run a very high speed in an attemp, I assume, to keep the engine cool. Mine is a 2004, any suggestions?
A little old but if you havent found your answer yet, I would diffently look up a forum called - www.lincolnvscadillac.com - Great group of guys/techs and will give you a solution within a hour or less of posting the problem - Just tell them I sent ya, and you will be golden!! Hope this Helps!
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You have to bleed the air out of the system. There are 1 maybe 2 bleeders on the front of the engine on the cooling system bypass pipe one near the upper hose the the othe on the drivers side of the pipe. They are brass with a small bleeder valve in the middle. Get the car up to temperature and take your time to allow all the air out. Refill cooling system after it cools. Hope you didn't do any damage running it hot.
the fan will turn on when the engine temp reaches a set temperature and will only turn off when the engine drops below a certain temp and on the highway running hard it may stay on longer
Fans are not coming on for the radiator so when your at a stop no air is flowing through the radiator. Check to make sure the fans are kicking on before the car starts to overheat.
I would take it to a shop,not the dealer,have them add 12 oz of freon,see if this does the trick,they will do this if they are a little low.If this does not help,have the shop check for vacuum problems to the ac control head.If this was at all helpful,please rate,thank you.
youre using more power during highway drives, therefore more vaccum. check your vaccum lines for leaks which may cause the vent door to close/or open which may be causing your problem. if your temp gauge shows the needle in the center of the gauge while driving on highway, your thermostat is fine. check vaccum.
Guys it is the heat sensor part # TS465 Google it and you shall find it. The tempurature jumps to hot then to low. Shut the car off and just minutes later it is back to normal, does this not send up a red flag that it is a false alarm. The car slows down (reduced power) as a safety cause computer recieves a false signal telling it that it has gotten hot.. I can't believe so many could have the same problem and still spend hundrreds trying to fix something that can be done by themselves for under $20..
you most likely have a coil pack going bad.
This can cause an electrical spike and cause computers to reboot just like your home PC in and electrical storm,that is why the transmission acts as if it does not know which gear to go in.
You need to have someone hook up a scan tool and retrieve the trouble codes and see if there is a miss-fire code stored in memory.
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