If you have a misfire or leaky injector that could clog up the converter if ran long enough.
If you fix the mission fire and give the car an Italian tune up it may go away on its own.
If one spark plug wires is not like the others, replace it.
Normally they develop really high resistance, not low.
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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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