Question about 1999 Mercury Cougar
99 mercury cougar v6
Posted by Anonymous on
I just got done replacing the O2 sensors in my 99 Cougar due to throwing a P0135 malfunction code. There's 3. Facing the engine there's one in the front coming off of the front header, which is easy to get to. Another more tricky one if between the engine and the fire wall on the rear header pipe. The third is under the vehicle behind the transmission pan on top of the exhaust. In order to replace the O2 sensor near the fire wall you will need to remove the 4 retaining bolts for the ECM module and move it out of the way. Additionally you will need to remove the 2 retaining nuts for a wiring harness that is seated below the ECM module. Pay close attention to the connectors because the front and under vehicle O2 sensors have round connectors the one near the firewall has a squared connector. I was able to replace all 3 by myself in approximately 35 minutes. If your throwing a O2 heater malfunction code it is most likely going to be the sensor near the firewall. make sure that you know someone with a code reader so the code can be cleared. If you're do for an emmissions inspection be sure to put at least 40 miles on the new O2 sensor with different types of driving (e.g. highway, coasting, decellerated turns and rapid acceleration). Gotta love project cars for your kids!!
Posted on Apr 04, 2009
mcdevito75 her, My immediate thought is a dead or weak battery, but it could be a bad starter also, here"s what to do, inside the car turn the key 1 notch to the on position, note the dash lights, now turn the key to start and note the dash lights again, do they go dim?? if they do you most likely have a weak battery, if the dash lights do not dim, open the door so the interior light comes on, any interior light, try to start the car, if the interoir light dims, you have a weak battery, if it does not dim with the key all the way to start, check and clean the battery connections, and suspect a bad starter. Any electrical appliance can go bad very quickly. Also if the battery is2 years old, replace it.
Posted on Jun 18, 2010
dont listen to that stupid ******* its right under your headers if you look in front of your motor there is a metal plate that says hot, take that off and you will see your headers and its under that i have the same problem with my cougar.
Posted on Sep 04, 2010
Tips for a great answer:
Jun 18, 2017 | Mercury Cars & Trucks
Oct 21, 2013 | 2002 Mercury Cougar
Feb 26, 2013 | 1999 Mercury Cougar
Aug 03, 2012 | 1999 Mercury Cougar
Mar 05, 2010 | 1999 Mercury Cougar
Dec 12, 2009 | 1999 Mercury Cougar
Oct 14, 2009 | 1999 Mercury Cougar
Jun 10, 2009 | 1999 Mercury Cougar
62 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: