I guess I'm not sure what you are referring to or what a fuel sync is??

 

I've searched but couldn't really find much help. I don't have a Schrader valve in the fuel rail so I need to put a tee in somewhere to check fuel pressure. What have you all done or seen done? Where did they put the tee in? I dont want to splice at the hose going in to the fuel rail, right?

 

Fuel sync is a fancy term Dodge uses for injector timing. It's set by turning the distributor on our engines. Timing is controlled by the ECM.

 

Yep. Need a scan tool to set fuel sync, one that is actually able to tell you what that value is.

Turning the distributor won't affect ignition timing either. That is all dealt with via the crank position sensor.

 

That's why I'm curious if setting it advanced, at 0, or a little retarded affects MPG. There's huge factors in driving style, elevation, hwy or city driving a person's commute involves, idle time, but some get 16 and some get 10 or 11 MPG. It would be interesting to know everyones MPG and where their fuel sync is set to see if a pattern develops.

 

Fuel sync will like have some affect on fuel economy, but, I doubt it would be more than 1 or 2 mpg, at best. Lots of things can contribute to poor fuel economy, and the condition of the engine, and rest of the components play a much bigger role. If fuel sync gets to far off, the engine simply runs terrible. If at all.

 

Sorry for getting off topic, but it would be really cool to know if a certain spot was better for
mpg. It would be an easy fix for a lot of people, or at least a good starting point.

 

Setting it to factory spec is best for performance, which would also turn out to be best for fuel consumption. (I refuse to call it 'economy' on these trucks. ) Plus or minus 7 degrees.