crappy conversion will have bad (messy) wiring that is often a butchered gasser harness made to work with the diesel. A good job involves installing the real diesel harness(es) and making it appear as though the car was a diesel to begin with. Anything that looks like it's a carryover from the gasser is a negative in my book.

steve a

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Steve A
92 W140 OM603
97 VW Jetta TDI
90 Passat variant TDI 6 speed MT
94 Chevy K1500 6.5TD
05 E320 CDI
+ others