Fuel line heaters

[Jchristenson]

When the temperature here in Breckenridge CO drops down closed to zero, which is about every night, and I let my pickup sit without being plugged in, the fuel line heaters and intake heaters do not work. What is the Problem?



-- email address removed --

 

[BushWakr - RIP]

I think there is a temp sensor in the manifold that triggers the heaters. Have you got access to a serv. manual? Tell us a little more about your truck for start, that would help with diagnostics.



Regards, Bob

 

[ETOBICOKE]

Heaters

First off our trucks don't have a heater for the fuel line. There is however a heater for the fuel filter which should always be on when the engine is running. As Bob has stated above, most likely your problem is the temp sensor. This sensor also operates the wait to start light via the engine controller. Normaly when you start on a cold day the wait to start lamp will light while the heaters are in operation. If you need some help with wiring diagrams send me an email.



Neil

 

[Jchristenson]

Hey, thanks fellas. My pickup is a 91 3/4 ton with the 5. 9 cummins. The heaters(for the fuel filter I just learned) work when the temp is above 10 degrees or so. But below that they don't work. Still sound like a temp sensor?



John

 

[ETOBICOKE]

Fuel Heater

My 92 manual shows the heater hard wired to the ignition switch, it's actualy tapped off of the feed to the injector pump solinoid. Possibly it has a bad ground connection? or the connector may be dirty? Now the intake heater solinoids share the same ground as the fuel heater, this is located near the right (passenger) headlamp, this also grounds several other things as well.



Neil