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MPG decrease - Injectors, wiring harness? 700 1986

posted by  jfs356 on  Fri Dec 6 10:13 CST 2013
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last visit: Tue Oct 7 05:49 CST 2014
[RELATED]

My gas mileage went up greatly when I replaced the exhaust system, including catalytic converter. They deteriorate slowly, blow bits into rear muffler, causing poor exhaust flow. If your cat is old/original to car (mine was original, passed E-check long ago), you might want to check it. Doubt that reduced gas mileage is electrical in nature.






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