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Rosy red glow Posted by Ari [Email] (#2847) [Profile/Gallery] (more from Ari) on Fri, 14 May 2004 05:56:58 In Reply to: Maybe a catalytic converter meltdown caused by DI, SWEDECAR [Profile/Gallery] , Thu, 13 May 2004 20:56:13 Members do not see ads below this line. - Help Keep This Site Online - Signup |
One warm summer evening a few years back I saw a guy in a parking lot with a Chevy SomethingOrOther. The engine was badly missing on at least one cylinder. The guy kept reving it, hoping that somehow that would make everything all right. There was a warm, rosy red glow coming from under the car, right where the Cat lives. All that raw gas from the missing cylinder was pouring into the cat, and the cat was doing it's best to convert. In the process, it was producing LOTS of extra heat. At some point all that extra heat and raw gas was going to produce something unfortunate. Spectacular, but unfortunate.
Basic rule - if the engine is obviously misfiring, Don't keep driving it. Don't hope that somehow it'll straighten itself out. Don't think you can limp it home just a little farther. No spark means unburned fuel is pouring into the exhaust system. In the pre-cat days, this usually did nothing more than blow the exhaust system off the car. With a cat, things are different, and nasty engine fires result.
This is easily done without a DI - a bad distributor cap, bad spark plug wire, or just a plug wire that fell off.
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