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Mercury Cougar Engine Questions

63 messages,  Last post on Nov 20, 2009 at 7:44 PM

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What is this discussion about? Mercury Cougar, Engine, Coupe

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#32 of 63 Re: 89 Cougar LS [vtraudt] by 89cougar Jan 29, 2009 (1:03 pm)
Replying to: vtraudt (Jan 29, 2009 12:23 pm) We found a line vaccum line off but do not know were it belongs and the diagram under the hood does not help and the book only shows the line for a supercharger and we have a 3.8L with out charger my son never said the dash went crazy it just shut off the started thanks for the help I will keep tring to get it.
#33 of 63 Mercury Cougar Trouble codes by johnnie632000 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 Replies to this message: 89cougar (Feb 05, 2009 8:56 am)
#34 of 63 Re: trouble codes question [vtraudt1] by johnnie632000 Feb 05, 2009 (8:17 am)
Replying to: vtraudt1 (Jun 21, 2008 2:59 pm) 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 Replies to this message: vtraudt (Feb 05, 2009 8:33 am)
#35 of 63 Re: trouble codes question [johnnie632000] by vtraudt Feb 05, 2009 (8:33 am)
Replying to: johnnie632000 (Feb 05, 2009 8:17 am) Johnnie, 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.   Volker
#36 of 63 Re: Mercury Cougar Trouble codes [johnnie632000] by 89cougar Feb 05, 2009 (8:56 am)
Replying to: johnnie632000 (Feb 04, 2009 2:50 pm) On my 89 I had no check engine light on and it passed smog with no problem
#37 of 63 Re: Idles until gas pressed [86Cougar] by thundercat Mar 04, 2009 (9:07 am)
Replying to: 86Cougar (Jan 23, 2009 1:27 pm) 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?   Johny
#38 of 63 Re: no get up and go 2002 mecury cougar XR coupe [tcastillo] by jaybirdjr Apr 29, 2009 (1:55 am)
Replying to: tcastillo (Aug 02, 2008 12:56 pm) Have the sparkplugs been changed? If so make sure they are platinum plugs and not regular resistor plugs
#39 of 63 Re: Crazy Gauges? Help an old CSG member out [advocatus] by jaybirdjr Apr 29, 2009 (1:59 am)
Replying to: advocatus (Nov 20, 2008 5:35 pm) battery or alternator problem. check the battery because the same thing happens when the battery is disconnected
#40 of 63 egr trouble code 2002 cougar by jaybirdjr 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 Replies to this message: pf_flyer (Apr 29, 2009 2:19 am)
#41 of 63 Re: egr trouble code 2002 cougar [jaybirdjr] by pf_flyer HOST Apr 29, 2009 (2:19 am)
Replying to: jaybirdjr (Apr 29, 2009 2:08 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.

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