!!!! The rear of the inj RETURN hoses are capped (last inj) The front goes to the top of the fuel filter, there is a nipple on the return line. Do not drive anymore with the fuel hooked to the shutoff if this is what they have done. Just plug that last line.

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1983 Mercedes 300SD
1987 Mercedes 300SDL
2001 VW Passat 2.8 AWD
2007 OM642 Jeep WK 4x4