Good Idea To Do GPR Cutoff
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Fleet Mechanic
Joined: Mar 2007
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From: Rio Rancho NM
Good Idea To Do GPR Cutoff
I drove my pickup to work last Friday. I hardly ever drive it to work but I made 6 stops on the way home and only turned on my glow plugs once - when I left work. It was about 35deg out and I was thinking how much time my GPR and GPs would have been on for each start had I not put in a GPR cutoff switch. Since the PCM keeps them on longer in the colder months, it makes sense that having a GPR cutoff would help extend GP and GPR life this time of year. I installed my switch in the hot wire that always supplies 12V to the GPR.
Post Fiend
Joined: Mar 2007
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From: Johnson City, TN.
The programming on a '97 and maybe even a '96 will not allow them to stay on the full time when the engine is up to temp. This may be a good idea in '95 and older trucks though. Especially in the summer.
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Fleet Mechanic
Joined: Mar 2007
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From: Rio Rancho NM
Neal, I guess I should have been more clear in that I left the GPR switch off when restarting during all my errands. If they don't come on at all during several starts, even though the engine may be warm, it has to help the life span of both. Especially for a daily driver.
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Originally Posted by powrstrkr
Neal, I guess I should have been more clear in that I left the GPR switch off when restarting during all my errands. If they don't come on at all during several starts, even though the engine may be warm, it has to help the life span of both. Especially for a daily driver.
Posting Guru
Joined: Sep 2004
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From: Ohio
they take combustion temp on when not in use, sincew they are ceramic like. When energized, they shoot off the scale, something like 2400 degrees or more, atleast thats where my infra red stopped......
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Fleet Mechanic
Joined: Mar 2007
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From: Rio Rancho NM
Originally Posted by Neal 97 250
I guess I'll leave mine on and cycling as they were intended.
That makes perfect sense but is it really necessary if you're running errands with repeated starts in just a few hours? I'm asking because I wasn't aware of the necessity of burning off deposits. I was just hoping to point out the advantage of a cutoff switch. My bad.
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Originally Posted by powrstrkr
'
That makes perfect sense but is it really necessary if you're running errands with repeated starts in just a few hours? I'm asking because I wasn't aware of the necessity of burning off deposits. I was just hoping to point out the advantage of a cutoff switch. My bad.
That makes perfect sense but is it really necessary if you're running errands with repeated starts in just a few hours? I'm asking because I wasn't aware of the necessity of burning off deposits. I was just hoping to point out the advantage of a cutoff switch. My bad.
My guess would be, (depending on how much), the crap would burn off when you did have to use them...
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