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cold start problem.....at a loss...

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Old Nov 2, 2005 | 08:07 PM
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cold start problem.....at a loss...

so ive had a cold start problem with my 97 7.3 ......after doing some research, i found that it was either the relay or the glow plugs themselves.......so i replaced the relay and all 8 glowplugs......the problem still persists......looking for more info, i found that it is possible that this was caused by weak batteries, so i hooked the truck up to my 55amp battery jump starter (plug in type, not battery charged type) and tried.....still no go.....


I dont know where to turn now....anyone have any ideas???
 
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Old Nov 2, 2005 | 08:12 PM
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Any blown fuses? Like maxi-fuse #22 under the hood.
 
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Old Nov 2, 2005 | 08:14 PM
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How cold is it where your at?? Plug your truck in and see if it makes any difference. If it starts after being plugged in for a few hours it most likley still a glow plug problem.
 
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Old Nov 2, 2005 | 09:21 PM
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its only about 52 degrees here.....should still start without a problem( i would think)

Unfortunatly, this truck was ordered without a block heater......i would rather not get a block heater to "bandaid" the problem.....

fuse 22 under the hood is good....fuse #12 label "diode" (20a) is gone, i will replace that on tommorow....will that one have any effect? does anyone have a listing of what each of those go to????....thanks for the idea....

i'm still taking anymore ideas you guys have !!
 

Last edited by norcalbmxer; Nov 2, 2005 at 09:28 PM.
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Old Nov 2, 2005 | 09:42 PM
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How long since it's been running? Is there fuel in the filter bowl?
 
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Old Nov 2, 2005 | 09:47 PM
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i can get it started...it takes a few trys though....sometimes 10-15 trys.....
This only happens when it gets below 60ish.....
 
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Old Nov 2, 2005 | 09:51 PM
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You're sure the new relay is working?
 
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Old Nov 2, 2005 | 10:45 PM
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Originally Posted by cookie88
You're sure the new relay is working?
havent tested, just trusting that it is new....will test....
 
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Old Nov 3, 2005 | 12:29 AM
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Did you replace the under valve cover (UVC) harnesses when you replaced the glow plugs? Do the pins in the connectors for these harnesses look OK?
 
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Old Nov 3, 2005 | 01:43 AM
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Boy, 50deg. is a summer morning to me! I have started my truck at -10deg. after cycling the glow plugs a couple times. I only do that when i dont have power for the block heater and no generator.
It doesnt sound like your glow plugs are working at all. Not even a little. DOes the gauge show a discharge for a minute or so after turning the key on?
 
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Old Nov 3, 2005 | 07:32 AM
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gpr gpr gpr gpr gpr
 
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Old Nov 3, 2005 | 07:38 AM
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Originally Posted by 1997F-350
gpr gpr gpr gpr gpr
Yes, or the wiring, or it's not commanded on for some reason. Your truck should start like it's fully warmed up on 50 degree morning with a functioning glow plug system. If all eight glow plugs are getting hot it will start within two or three seconds of cranking all the way down to -20.
 
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Old Nov 3, 2005 | 07:41 AM
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touch both terminals on the gpr with a screwdriver for about 10 seconds and then try to start it. if she rips then you need a new gpr.
 
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Old Nov 3, 2005 | 09:17 AM
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Originally Posted by 1997F-350
touch both terminals on the gpr with a screwdriver for about 10 seconds and then try to start it. if she rips then you need a new gpr.
just did that this morning.....i got a hot screwdriver now, but not a starting truck......

looks like i should test the harness next huh?
 
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Old Nov 3, 2005 | 11:55 AM
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look at the pins on the harness to valve cover connection. its the outside pin on every plug and gasket.

like this:

[gp] [inj] [inj] [inj] [gp] if that makes sense
 
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