112000 miles no check engine light and all origanal equipment on it except muffler. Runs good but has some pinging on exceleration. Gas milage is down to 12 mpg. Recently have developed a hole in the extention pipe and on last fill up since developing hole has gained 2 mpg which is not much but it is somehting I am wondering about. could partial blockage of muffler be part of some of the cause for poor mpg. original cat. and o2 sensor and egr valve still on there. Have had tune ups of course and normal maintance. bought van new. Use injector cleaners usually lucas. Use octane computer is rated for. Good tire presure most of the time. any sugestions?
Your exhaust or cat is plugged. A friend of mine had the same vehicle and symptoms. His was the cat. The exhaust system would get so hot it would glow dull red at night from the cat foward. We put on a universal cat and problem solved.
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