Last post on May 19, 2012 at 6:40 AM
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Mercury Cougar, Engine, Coupe
#21 of 153 2000 Mercury Cougar Problems
Dec 31, 2008 (9:57 am)
Need help with my cougar. Temp guage shows hot. I have replaced the coolant temp sensor three times Bought two new ones and tried one from a junk yard. One of the new ones did not mark at all on the gauge. The one from the junk yard and the other new one mark hot. I have installed a new water pump, replaced all of the belts, replaced the radiator. Put a new radiator cap, had the whole system pressure tested. All checks out to be good. Pressure holds up, no leaks anywhere. What can I check to fix this problem? Any and all help will be greatly appreciated.
#22 of 153 Re: 2000 Mercury Cougar Problems [lmoreno3]
Jan 01, 2009 (8:02 am)
Have you measured the actual temp of the coolant (to determine if the gauges/sensors are wrong)? An IR temp sensor is useful. Even the temp of the readiator metal or coolant hoses will give a good approximation.
How soon do the gauges show "hot"? If soon after startup, your coolant thermostat is stuck and won't open. In this case, one of the rubber hoses is hot, while the radiator is still cold.
#23 of 153 Re: 2000 Mercury Cougar Problems
Jan 03, 2009 (11:16 am)
If I am on the highway doing 70 mph, it takes about 10 mins. for the gauge to start marking hot. Have had it checked with an IR temp sensor, have checked the hoses to see if any are collapsed and none are. Water in the bottle, does not boil out. Thermostat is brand new.
#24 of 153 Re: 2000 Mercury Cougar Problems [lmoreno3]
Jan 03, 2009 (11:39 am)
I'd say: if not done already, change the coolant termostat ($6.99 at Autozone), install a lower temp than factory (180 deg F or less). Its not that much work and costs nothing.
Are your fans kicking in?
#25 of 153 Re: trouble codes question [lmoreno3]
Jan 04, 2009 (7:48 pm)
E-bay our buy it at the dealers.
#26 of 153 Re: 1999 Cougar: hose on top of transmission case: where does it go? [vtraudt1]
Jan 18, 2009 (11:18 am)
im sure u already have this answer, but it doesnt go anywhere, its a vent.
#27 of 153 Re: trouble codes question [yankabilly]
Jan 18, 2009 (11:28 am)
I learned back then from the posts that this is going no where, just an open vent hose.
#28 of 153 Idles until gas pressed
Jan 23, 2009 (2:27 pm)
HELP!!! My baby, an 86 Cougar, has developed a problem and you don't know when it will occur; but seems to happen after getting warmed up. For instance, drove to work, everything fine; on way home stopped by store. Waiting red light, engine idle fine...light turns green & I press the gas and she bogs & dies. Started back up OK, but then had to keep foot on brake & gas when slowing or stopping or car would die. I'm not ready to give up on the old girl---she's been too good to me for over 20 yrs. Up until now, she ran when all the others would break down!!
#29 of 153 Where is the outside sensor located?
Jan 25, 2009 (5:45 pm)
Where is outside sensor located on my newer Mercury Cougar that registers the outside air temperature on the inside of my car? Ive always wondered where this is located on a car.
#30 of 153 89 Cougar LS
Jan 29, 2009 (11:26 am)
My son car will shut off when driving down the road it will do it only sometimes and he can only get heat or air through the defrost vent will not come out the vents in dash. If anyone can help I would be very thankful he is very upset it's his first car thanks for any help :cry