changed glow plug relay, still wont start cold - Ford Powerstroke Diesel Forum
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post #1 of 17 Old 01-04-2012, 07:13 AM Thread Starter
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changed glow plug relay, still wont start cold

whats the next thing to check? It starts fine when warm or plugged in. When cold it just turns over.
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post #2 of 17 Old 01-04-2012, 07:16 AM
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did you check the glow plugs themselves? What have you done so far other than just the relay?
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post #3 of 17 Old 01-04-2012, 07:19 AM
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Mine does the same. I have to push the pedal down to start it (which is standard starting procedure in the owners manual).

Could be your oil as well by the way

Nonconformist. Functionality over bling.

My three rules for 7.3l troubleshooting: 1) Replace CPS and keep a spare. 2) Replace FPR and know your fuel pressure. 3) Hook it to a scanner and check for codes.
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post #4 of 17 Old 01-04-2012, 07:26 AM
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Have you checked to see if the GPR is, in fact, putting out voltage to the GPs? Could the GPs or wiring to the GPs be faulty?
Do you try to start as soon as the WTS light goes out? When it's cold the GPR stays on for up to 2 minutes. Have you tried waiting longer after the WTS light goes to try to start?

Sometimes here in CA it gets to the cold-for-us 20*s - I will count to 30 after the WTS light goes out. Seems to help some.

Just some thoughts - It's what I would check. Hope it gives you a direction to go.


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post #5 of 17 Old 01-04-2012, 04:07 PM
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Does it ever act like a engine with the timming off?
If it does chances are you could have a bad injector or more.
But I would do all the trouble shooting prior to replacing any injectors.
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post #6 of 17 Old 01-04-2012, 05:17 PM
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ive found alot of trucks that the valve cover gaskets bad and cause that problem

00 f350 crewcab dually 4x4
7.3l psd 6 speed
edge attitude box
4 in turbo back silverline stainless steel
centurion conversion
short throw shift package
exhaust brake
bully dog flashed ecm
cold air intake
"the money pit"

99 ranger
2.5l 5 spd
stepside
4/5 drop

88 chevy 1500 4x4
thrush turbo/gutted cats
mud tires
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post #7 of 17 Old 01-04-2012, 06:06 PM
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Quote:
Originally Posted by darkostoj View Post
whats the next thing to check? It starts fine when warm or plugged in. When cold it just turns over.
My '02 is the same way....it will eventually start, but it takes a little while. I had my oil changed at Firestone not to long ago and I can't remember what they put in it. When its time to change it again I'm gonna make sure they put 5w40 (I think that's what was recommended by a few guys on here, if I remember correctly. Damn this getting old thing! )


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Por15 the frame and underside of the truck
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post #8 of 17 Old 01-04-2012, 06:22 PM
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Check GPR for proper operation and voltage
Check GPs for proper resistance. There is a sticky. Search it.
Check the UVCHs for good connections as they supply power to the GPs.
Last fuel filter change?
Last oil change and what weight?

Pushing pedal down is only going to help once it's started, and that has to do with increasing the IPR duty cycle and ICP, which helps flow that cold, thick oil at those high pressures better. That's just a thick oil and weaker HPOP.



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post #9 of 17 Old 01-05-2012, 08:51 AM
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Ok, so after reading this, I decided not to plug my truck in last night and try to start the dang thing "cold". The overnight low here was in the low 20's.

Went out this morning and turned the key, let the glow plugs heat up for about 30 seconds or so and cranked. No start. Let off and tried again...no start. Re-cycled the key and GP's....no start. Noticed some white smoke that smelled like fuel, so I'm assuming it's getting plenty of fuel. Re-cycled the key and let the GP's warm for about 30-40 seconds and she fired up.

What do you experienced guys think??? Change out the GP's and the relay?? If I plug it in, I have absolutely ZERO problem starting it up.


2002 F250 XLT CrewCab
ISSPRO Gauges
TS Performance Chip
4" exhaust, turbo back
6" stainless tip
DIY 6637 intake
One Source Bumper Replacement
Marinco Mod
Wanted
New tires
Por15 the frame and underside of the truck
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post #10 of 17 Old 01-05-2012, 09:08 AM
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im the same way man, it says i have 4 glow plugs out, and dont know whether to change the module or glow plugs.

2008 f250 ccsb 4x4 lariat.. 8 inch lift, 24in fuel hostage, 40in ss m16, Arp studs, egr delete, street diesel performance down pipe, intake elbow and cac pipe, Diesel site boots, xrt pro with kem tunes, s&b intake, 5 inch exhaust, edge cts, tinted mirror lights, pioneer 8400 double din, hid headlights and fogs, two jl audio 13tw5 with rockford 1500 watt amp, jl audio door speakers and tweeters, prestige 2 way alarm and remote start.

00 f350 lariat 7.3 cc lb. (the worker)
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