Half the GP's shot? Cold starting help needed. - Ford Powerstroke Diesel Forum
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Old 01-17-2012, 06:45 PM
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Half the GP's shot? Cold starting help needed.

My early 99 has trouble starting when its cold. And by cold i only mean about 30 degrees in the garage. It should start much better than this, its starting to chap me a bit. I have to keep the block heater plugged in to get it to fire. I put a stancor relay in, and new batteries. Still no change. I did the glow plug diagnostic and found 1.44 ohms resistance on all 4 on the drivers side. Passenger side showed .01 ohms on all 4. Relay has 12 volts and "clicks" off after about 1 1/2 minutes. Could there be something unplugged on the passenger side or are all 4 gp's on that side shot? Could there be another problem? What do you guys think.
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Old 01-17-2012, 08:04 PM
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Quote:
Originally Posted by WOODYBC View Post
My early 99 has trouble starting when its cold. And by cold i only mean about 30 degrees in the garage. It should start much better than this, its starting to chap me a bit. I have to keep the block heater plugged in to get it to fire. I put a stancor relay in, and new batteries. Still no change. I did the glow plug diagnostic and found 1.44 ohms resistance on all 4 on the drivers side. Passenger side showed .01 ohms on all 4. Relay has 12 volts and "clicks" off after about 1 1/2 minutes. Could there be something unplugged on the passenger side or are all 4 gp's on that side shot? Could there be another problem? What do you guys think.
I would bet your UVCH is bad.... I would pop the VC and check the harness, specifically to look for burnt pins:

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To check for burnt pins: UVCH burned center pin - Ford Truck Enthusiasts Forums
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Old 01-17-2012, 09:52 PM
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UVCH............
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Old 01-18-2012, 12:57 PM
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Thank you, I'll check on it tonight. So if it looks burnt, do I just clean it off, or do I replace the entire harness? The truck runs fine once started, just the gp's are dead.
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Old 01-18-2012, 01:01 PM
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Glow Plug and Glow Plug Relay Test: GP & GPR System - Ford Truck Enthusiasts Forums

If the UVCH is burnt up or melted it needs to be replaced.

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Old 01-19-2012, 03:15 PM
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I was able to pull the passenger side valve cover tonight and inspected the wiring harness. I unplugged it and inspected the pins and connectors. There were no burnt pins everything was shiny and clean. The plug was pushed in tight and secure. I expected to see the burnt pin as suggested but it appeared good.
I did change the relay to a Stancor relay last winter when it was acting up like it is now. Nothing changed. Could it be possible that I hooked the wires up incorrectly on the relay to cause this issue. ( again no glow plug ohms on the passenger side, hard to start cold.) Thanks guys, I really appreciate your input.
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Old 01-30-2012, 05:48 AM
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Ok I'm a tool. I re-traced my steps on the Stancor Relay and discovered that I had put the small wires on the wrong terminals. Everything seems to be working much better now.
Thanks everyone.
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