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I murdered all my emissions equipment on certain vehicles a long time ago.
Here crackheads have been stealing catalytic converters, most of the people who have their converters stolen just have a pipe welded in its place so it don't happen again.
Something strange diesel engines do is over time they produce less NOx, where gasoline engines produce more. So if the EGR was blocked now, the engine could very well be making less NOx then when it was new. The break even point between gas vs diesel NOx back then in the 1990s was something like 50,000 miles.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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