87 cougar cat. conv. problems October 26, 2008, 06:18:28 PM i have just bouht another 20th anniversary edition and started to restore it (starting with the engine) and have noticed that the motor has almost no power and after only a minute of driving all 3 catalytic converters are smoking like crazy. ive replaced the plugs,wires,dist. cap and rotor. could the converters be stopped up or the timing be off? also i thought it could be the pcv valve, but i cant find out where it is. Quote Selected
87 cougar cat. conv. problems Reply #1 – October 26, 2008, 08:46:13 PM Sounds like you need cats.Remove the o2 sensors from the exaust and take it for a drive,if the power is up,there's your problem. Quote Selected
87 cougar cat. conv. problems Reply #2 – October 26, 2008, 10:52:45 PM convert it to true duals using stang headers and a high flow hpipe since you need new cats anyways.... Quote Selected
87 cougar cat. conv. problems Reply #3 – October 27, 2008, 12:04:15 AM i appreciate it guys ill try removing the o2 sensors but if that dosent solve it any more possibilities? Quote Selected
87 cougar cat. conv. problems Reply #4 – October 27, 2008, 01:02:26 AM what have you done other than plugs and tune up.You should only need to gut the last cat,, easy enough,then retest.Drive the car at night then park it.,, if the last cat is glowing redish, then its clogged so gut it.at worse case, loosen up the header bolts and lower the y pipe so exhaust escapes around the . that will bypass the cats while you troubleshoot.You also need to pull codes, jot down your compression numbers, and also supply your fuel presure reading.put up some more details, Quote Selected
87 cougar cat. conv. problems Reply #5 – October 27, 2008, 03:56:58 AM My cats where glowing and my car would run like after it warmed up and all was just the vac hose on the MAP sensor. Just another easy check Quote Selected
87 cougar cat. conv. problems Reply #6 – October 27, 2008, 11:12:15 AM What's your timing set at? Quote Selected
87 cougar cat. conv. problems Reply #7 – October 27, 2008, 11:47:56 AM Have you run codes?Always a good thing to do with ANY EEC4 car that is not running well. It may not tell you anything, but sometimes it will tell you all you need to know. Quote Selected
87 cougar cat. conv. problems Reply #8 – October 27, 2008, 04:46:31 PM Quote from: Chuck W;240533Have you run codes? Always a good thing to do with ANY EEC4 car that is not running well. It may not tell you anything, but sometimes it will tell you all you need to know. That should be a rule.post the codes before askin for help. Quote Selected
87 cougar cat. conv. problems Reply #9 – October 27, 2008, 06:57:51 PM pulled the o2 sensors, that made it run a little better, as far as the codes, call me retarded but im not really sure how to pull them w/o a scanner, ive read jcassity's link on pulling them but its still kind of hazy i understand most of it connecting the jumper from the signal return to the STO, letting the car warm up, shutting it off waiting ten secs. and watching the check engine light with the key on, but nothing happens. could this also be done with connecting a test light to the positive terminal and the signal out? Quote Selected
87 cougar cat. conv. problems Reply #10 – October 27, 2008, 07:02:22 PM only othewr things i have done to it so far are replacing valve cover gaskets, transmission filter and gasket, and a new fuel filter Quote Selected
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