Last post on Sep 03, 2013 at 4:07 AM
You are in the Cougar Support Group
What is this discussion about?
Mercury Cougar, Engine, Coupe
#33 of 156 Mercury Cougar Trouble codes
Feb 04, 2009 (2:50 pm)
I have a 1997 Mercury Cougar 4.6 engine. I am getting 2 trouble codes. (1) P0171 and (2)P0174. From what it tells me is that bank 1 and bank 2 are to lean. Can you tell me what cause's that and what I can do to fix it. Also I would like to know if these 2 codes will keep my car from passing an emissions test. Thank You for your time. John
#34 of 156 Re: trouble codes question [vtraudt1]
Feb 05, 2009 (8:17 am)
Hi There, Was wondering if you ever found out the cause of your trouble codes P0171 (bank 1), P0174 (bank 2. I have the same codes on mine stating that both banks are running lean. Thank You John johnnie632000yahoo.com
#35 of 156 Re: trouble codes question [johnnie632000]
Feb 05, 2009 (8:33 am)
mine is a 1999 Cougar (2.5l V6 auto). We had tons of error codes, and recently had "white smoke" and fouled spark plug, a strong sign for head gasket problems.
We finally took everything aport, had both heads flow tested and planed, did a valve job. We also removed the "internals" of the pre-cat and installed the electronic dummy parts to fool the oxygen sensor.
After everything is back together, it is working fine.
Regarding the lean running: It was likely caused by a vacuum leak, possibly from not installing the seal of the upper intake manifold correctly when we had it off a long time ago.
We also found a broken vac line which caused the vents to not operate (air only coming out of defrost nozzles). Shrink tube and electrical tape to connect the broken line fixed that, too.
The only real problem left is now: the starter "grinds", it does not slip into the flywheel. We replaced starter about a year ago, but the problem soon came back.
The only way to get it going is to switch gear into drive, then wiggle the car back and forth (in the hope to move the flywheel a bit to let the teeth of the starter engage).
We are looking for a rigged solution to move the flywheel to allow the starter to engage. I don't think changing the starter will do any good. And changing the flywheel sound like a major job.
#36 of 156 Re: Mercury Cougar Trouble codes [johnnie632000]
Feb 05, 2009 (8:56 am)
On my 89 I had no check engine light on and it passed smog with no problem
#37 of 156 Re: Idles until gas pressed [86Cougar]
Mar 04, 2009 (9:07 am)
It sounds like your EGR valve is malfunctioning. It may be stuck. Do you know any one with a code reader capable of OBDI diagnostics?
#38 of 156 Re: no get up and go 2002 mecury cougar XR coupe [tcastillo]
Apr 29, 2009 (1:55 am)
Have the sparkplugs been changed? If so make sure they are platinum plugs and not regular resistor plugs
#39 of 156 Re: Crazy Gauges? Help an old CSG member out [advocatus]
Apr 29, 2009 (1:59 am)
battery or alternator problem. check the battery because the same thing happens when the battery is disconnected
#40 of 156 egr trouble code 2002 cougar
Apr 29, 2009 (2:08 am)
I have a 2002 cougar and the engine light is on. The code says egr. have replaced the egr valve, egr solenoid, egr pressure sensor, and the fuel cap. It still comes on after the code has been cleared. any suggestions? Thankyou in advance
#41 of 156 Re: egr trouble code 2002 cougar [jaybirdjr]
by PFFlyer@Edmunds HOST
Apr 29, 2009 (2:19 am)
I had a code indicated egr valve malfunction but it turned out not to be the valve itself but a leak in one of the lines connected to the valve.
#42 of 156 2000 Mercury Cougar Continuing Problem
Jun 15, 2009 (7:45 am)
Hey fellas, lmoreno3 here. I am still having the same problems with my sons cougar, As last posted. New radiator, new cap, new belts, new temperature sensor, put in a 160 degree thermostat(aftermarket). New water pump. Had it retested for any leaks. Holds pressure, no leaks. Had radiator and hoses checked with IR. All shows good. Seems water is flowing as it should. Temp gauge still shows hot after driving it for about 10 minutes at 70 mph or for 30 minutes driving at 35-40 mph, city driving. I have just bought a new aftermarket electrical water temp gauge, Exxus brand at O'Reilly's for 17.00 bucks. I am going to hook that one up and deaden the factory one. I want to see what the real water temp is. When I find out if it is overheating or not, I will post my results. Again, water does not boil in the resevoir, or boil out.
Post results soon.