Had a bad coil pack, engine misfiring. catalytic converter plugged up. Replaced exhaust system and bad coil ( 1 of 2). Now about 3000 miles later, car running poorly and told cat converter plugged again and needs replaced. My Son said check engine light was on but no codes show up. Haven't noticed any misfire or reason for cat to fail. Replaced Exhaust system again and second coil just to be safe, runs fine. Any ideas why catalytic converter would plug again?
Catalytic convertor fails due to oil burning, recent head gasket, improper fuel control,but plugging up at 3000 mile misfire surely plug it up when the vehicle is dumping gas in the catalytic, lean misfire ,running very rich due to a coolant temperature.Who is putting this on?I dont know what state you are from,a catalytic should not be installed unless the vehicle is in proper fuel control.and whoever installed this should foot the bill. You need to claim warranty regardless and plus there is a EO# that must match the vehicle.
SOURCE: 1998 crown vic police. Had check engine light with
your egr on that side is dirty try cleaning it aslo check intake boltsaround those clyinders.
SOURCE: Buick Century 97 runs rough and stutters when cold and gas applie
start by replacing the plugs and plug wires, this is esp true if car has over 100,000 miles on it. damp air can make the problem worse.
Testimonial: "helpful"
SOURCE: My car would not start, was cranking but not
Running extremely lean. Did you replace the 02 sensors? They detect lean and rich conditions and if the previous problem was too rich, the 02 sensors may have set ecu to run lean because of their problem. Now converters are free flowing and the settings should have again adjusted itself if the 02 sensors haven't flaked out. Overheating is and a fire hazard.destrucive to a converter and as hot as you say they are getting is not good. Do this, in the intake ducting is a sensor call a maf sensor. It's in a metal section. See how dirty it is. Then buy a spray can of CRCelectrical cleaner and spray wash the sensor thoroughly. Do not touch, rub, or brush the sensors, Just rinse dirt away with spray. The sensor is delicate, sensitive and very expensive to replace. DO NOT USE COMPRESSED AIR! The spray will dry quickly. Good Luck and make sure you have a clean air filter. Let me know if you will please.Ned
SOURCE: 2.2 ecotec engine. Code says random misfire. What
did you fix it? if you did what did you do? i have the same prblm thanks!
SOURCE: 2002 Chevy Trailblazer 6 cyl The catalytic
If you've gotten a tank of contaminated fuel, I'd check on the condition of the injectors first.
, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. 366 views
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