Replaced glow plugs and still hard starting - Ford Powerstroke Diesel Forum
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post #1 of 8 Old 01-28-2013, 12:45 PM Thread Starter
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Replaced glow plugs and still hard starting

Hey guys, I just replaced the glow plugs in my 03, and it still is hard starting on cold mornings. It never used to be hard starting and now at approaching mid winter 0 degree weather its starting to anoy me. It starts fine once warm, just when it's cold. The mechanic says it's probably the injectors getting old, I have 150,000miles on them. Does this make sense, as I don't want to spend a whole lot of money on injectors if I don't have to. How do you know when injectors are bad? Power and economy seems good and the HPOP and IPR tested fine.

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post #2 of 8 Old 01-28-2013, 12:48 PM
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Originally Posted by stock View Post
Hey guys, I just replaced the glow plugs in my 03, and it still is hard starting on cold mornings. It never used to be hard starting and now at approaching mid winter 0 degree weather its starting to anoy me. It starts fine once warm, just when it's cold. The mechanic says it's probably the injectors getting old, I have 150,000miles on them. Does this make sense, as I don't want to spend a whole lot of money on injectors if I don't have to. How do you know when injectors are bad? Power and economy seems good and the HPOP and IPR tested fine.
How cold is it currently when you're trying to start your truck?

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post #3 of 8 Old 01-28-2013, 12:53 PM Thread Starter
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Its about -10C or I think thats about 10F.

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post #4 of 8 Old 01-28-2013, 12:59 PM
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Its about -10C or I think thats about 10F.
At about that temp, you shouldn't be trying to start your truck on GPs alone. They're usually good for about 30*F to about 17*F(not sure what those temps are in metric.) Try using your block heater when experiencing really cold temps. If you get a day where it's about 20*F, try starting the truck with just GPs & no chord, see if you still have the romps.

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post #5 of 8 Old 01-28-2013, 01:07 PM Thread Starter
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Yes, I have done that as well, and plugging it in does sure help, but it still chugs little for a second or two and then idles fine.

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post #6 of 8 Old 01-28-2013, 01:11 PM
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Yes, I have done that as well, and plugging it in does sure help, but it still chugs little for a second or two and then idles fine.
Really? That's odd. You replaced ALL of the GPs? How's your GPR?

"HEAVY" 2001 F-250 XLT 4x4 EC SB:
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post #7 of 8 Old 01-28-2013, 02:02 PM
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ya i would check the gpr.
how are your batteries too? they gotta be atleast 875 cc amps. also try cleaning the battery terminals and connections, mine got dirty and that was causing slow starts for me.
also when did you last do an oil change? consider switching to a 5w-40 synthetic

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post #8 of 8 Old 01-28-2013, 02:26 PM Thread Starter
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Thanks Guy's, I only replaced the one side of the Glow plugs, as I had two none working GPL's on the right side. The other side all tested within factory OHM's, but with 150,000miles I may just as well as replace them. I already replaced the GPR with a GP109 instead of the GP110 as it was cheaper. I may try a stancor, not sure where to get one. I run 5w-40 synthetic and know that makes a difference as well. I guess I will start with some more glow plugs and go from there.

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4inch turbo back Flow Pro Exhaust
Edge evolution II programmer/monitor
AFE intake
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