High idle mod worthy for all?

[Mopar1973Man]

Yep within the VP44.

 

I supposed fuel temp plays a role in kicking on the fuel bowl heater? 

 

No. The fuel heater is self contained thermostatic switch inside the fuel heater itself. There is no ECM control of the fuel heater.

 

[Ilikeoldfords]

So what would the reason be to have a temp sensor in the VP? Just for monitoring?

[joecool911]

My truck is definitely noisier at startup than it is after it warms up. Good to know the reason for this.

[Me78569]

Thans Mike,  Good to know.

[Mopar1973Man]

So what would the reason be to have a temp sensor in the VP? Just for monitoring?

 

From what I can figure out is temperature of the fuel will effect timing of the VP44 so the colder the fuel the more advanced the timing. This allows more time for the VP44 to inject the fuel, convert from liquid to vapor then to ignite. Where hotter fuel would ignite easy and would require less timing. Then of the fuel got excessively hot then defuel the VP44 to attempt to protect it from damage. But you would be shocked at the temperature it has to get to to trip a code of VP44 over temp.