Differential should be unrealted to no start condition.

First, check for a pinched fuel line or something connected backwards back by the tank. Then start with the basics. Confirm you've got compression, fuel and glow. After that look for vacuum leaks effecting the shutoff solenoid at the back of the IP and at the key.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)