Fuel Heater - Ford Powerstroke Diesel Forum
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post #1 of 11 Old 09-20-2017, 07:32 AM Thread Starter
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Fuel Heater

When is the fuel heater powered, specific temperature or range?

97 F350 XL std cab, zf5, srw (converted), 4wd, 3.55s, stock wheels/tires & rebuilt 9.18
2 Donaldsons, 3" dp, ACs, T500, HV LPOP, Hydra w/PHP, DIY 60 gl tank w/6 gl sump, eFuel/Cat filters, Aeromotive RR, Auber instruments, 140v IDM, KC 300X 63/70/84, boost fooler, RiffRaff bellowed up pipes, 6.0 IC, 3" plenums w/RiffRaff inserts & SB 425HD
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post #2 of 11 Old 09-20-2017, 06:37 PM
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You would need to figure out what the feedthrough on the fuel bowl does at various temperatures. I'm not sure what it actually is (a thermistor???), but it gets battery voltage all the time and must vary the current or voltage with temperature. Cheers!

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post #3 of 11 Old 09-20-2017, 10:40 PM
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Maybe with EOT temp? Since its a glow plug motor and fuel blends have gotten better i'd say its fairly out dated but some people don't like messing with the factory stuff
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post #4 of 11 Old 09-21-2017, 05:02 AM Thread Starter
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Thanks for the replies.

I have DYI efuel, no fuel bowl, so the heater control is not being used. I was wondering if the control voltage is variable or on/off? If it was on/off I would try using it to control a relay which would have the glow plugs signal from the PCM. Essentially, the glow plugs would only heat when necessary. If I need to use a snap switch, so be it.

97 F350 XL std cab, zf5, srw (converted), 4wd, 3.55s, stock wheels/tires & rebuilt 9.18
2 Donaldsons, 3" dp, ACs, T500, HV LPOP, Hydra w/PHP, DIY 60 gl tank w/6 gl sump, eFuel/Cat filters, Aeromotive RR, Auber instruments, 140v IDM, KC 300X 63/70/84, boost fooler, RiffRaff bellowed up pipes, 6.0 IC, 3" plenums w/RiffRaff inserts & SB 425HD
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post #5 of 11 Old 09-21-2017, 07:02 AM
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You can hook a voltmeter up to the fuel bowl heater wire and see what it does.

You can use the GPR as a signal to a relay without any problems.
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post #6 of 11 Old 09-21-2017, 07:35 AM Thread Starter
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Quote:
Originally Posted by White95f250 View Post
You can use the GPR as a signal to a relay without any problems.
That would be backwards from what I want. I'm going to limit the GPR to closing only below about 80 degrees F engine temp.

97 F350 XL std cab, zf5, srw (converted), 4wd, 3.55s, stock wheels/tires & rebuilt 9.18
2 Donaldsons, 3" dp, ACs, T500, HV LPOP, Hydra w/PHP, DIY 60 gl tank w/6 gl sump, eFuel/Cat filters, Aeromotive RR, Auber instruments, 140v IDM, KC 300X 63/70/84, boost fooler, RiffRaff bellowed up pipes, 6.0 IC, 3" plenums w/RiffRaff inserts & SB 425HD
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post #7 of 11 Old 09-21-2017, 08:00 AM
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EOT should already send that signal. I'd leave glow plug signal alone unless you have something special going on.
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post #8 of 11 Old 09-21-2017, 08:33 AM Thread Starter
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The something special is, my glow plugs will not be on when the engine is warm.

97 F350 XL std cab, zf5, srw (converted), 4wd, 3.55s, stock wheels/tires & rebuilt 9.18
2 Donaldsons, 3" dp, ACs, T500, HV LPOP, Hydra w/PHP, DIY 60 gl tank w/6 gl sump, eFuel/Cat filters, Aeromotive RR, Auber instruments, 140v IDM, KC 300X 63/70/84, boost fooler, RiffRaff bellowed up pipes, 6.0 IC, 3" plenums w/RiffRaff inserts & SB 425HD
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post #9 of 11 Old 09-21-2017, 09:37 AM
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They are not on once engine is warm. PCM reads EOT and when that hits a certain temp then they shut off. Even in 95 degree weather my glow plugs are on for a few seconds then shut off. If yours are staying on then you have another issue.
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post #10 of 11 Old 09-24-2017, 08:36 AM Thread Starter
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Well, mine come on every time the engine is started no matter what temp the engine is. The duration declines with engine temp increase. IMO, the GP and GPR don't need to be activated at all when the engine is above ~ 100 F. I would imagine this Ford configuration would reduce smog some what?

97 F350 XL std cab, zf5, srw (converted), 4wd, 3.55s, stock wheels/tires & rebuilt 9.18
2 Donaldsons, 3" dp, ACs, T500, HV LPOP, Hydra w/PHP, DIY 60 gl tank w/6 gl sump, eFuel/Cat filters, Aeromotive RR, Auber instruments, 140v IDM, KC 300X 63/70/84, boost fooler, RiffRaff bellowed up pipes, 6.0 IC, 3" plenums w/RiffRaff inserts & SB 425HD

Last edited by MeTo; 09-24-2017 at 08:41 AM.
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