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Since replacing my VP44 and the onset of colder weather, I have had a recurring problem, setting a 1693 code. Typically the code will clear itself after a few engine starts, but return the same day or maybe a couple of days later. What might be a likely cause of this problem and where should I...

Took the truck into the folks that rebuilt the VP 44 and had them do an analysis with their machine. There was a code in the RCM. All was fine with ECM and the pressure transmitter for my low fuel pressure light was bad, as I suspected. Truck is now fine with the Smarty in the stock position...

Few days ago I had my VP44 changed due to an abrupt failure resulting in engine shutdown and no restart. Had the following codes 1688, P0254, P0602 and 1693. Got in the truck this morning after getting back from the shop yesterday and my fuel pressure light did not go out when I turned the key...

Thanks for the replies. Mike

I have looked but not found any reference to what if anything needs to be done if you have a VP44 failure and a Smarty program in use at the time of the failure. Is it necessary to go back to stock or ? Thanks Mike S

Dana 80 I just rebuilt my Dana 80. Thought only the locker was bad, but when checking the unit, found lots of metal in the oil caused by the bearing races sloughing chunks. Oil had been changed and Friction modifier was used at oil changes. Mileage on the differential... ... ... ..... 135,000...

Isn't true that the VP44 internally relieves at 21psi? Mike

G56 conversion Dan at Quad 4x4 was suppose to do a NV5600 to G56 conversion this past fall. Might want to ask him. Mike S

Speaker Anyone have 1999 Infinity drivers door speaker/amp they might want to sell? Thanks Mike