GP's or GPCM bad w/out codes?
Thread Starter
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Logistics Pro
Joined: Jul 2004
Posts: 4,859
Likes: 55
From: Middleville, MI
GP's or GPCM bad w/out codes?
so my truck refuses to start this morning. i run
-5w40 synthetic
-Ed's FICM w/ Atlas 40
-diesel kleen in every tank
-blue fuel spring
EOT is currently mid 20*'s, ECT is mid 30*'s
is it possible for the glow plugs or module to be failing without showing any codes on my scan gauge II? are one of these two likely the culprit based on my list above?
-5w40 synthetic
-Ed's FICM w/ Atlas 40
-diesel kleen in every tank
-blue fuel spring
EOT is currently mid 20*'s, ECT is mid 30*'s
is it possible for the glow plugs or module to be failing without showing any codes on my scan gauge II? are one of these two likely the culprit based on my list above?
Posting Guru
Joined: Nov 2012
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Glow plugs have there own module, each time you go to start it will self test the glow plugs. If it fails it will leave the glow plug light on, it passes it turns it off.
Glow plugs may or may not leave a code or message on the communications center of a newer 6.0
You may have other issues. Low ICP, bad fuel, no sync. ficm problems etc.
Glow plugs may or may not leave a code or message on the communications center of a newer 6.0
You may have other issues. Low ICP, bad fuel, no sync. ficm problems etc.
Hotshot
Joined: Apr 2010
Posts: 19,061
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From: Saratoga Springs,UT
If you had ANY Glow Plug SYSTEM Issues the CEL would be ON
Its Considered Emmissions componet and any problem will trigger CEL Imediatly
No CEL for GP issues Id say your problem is something else
Its Considered Emmissions componet and any problem will trigger CEL Imediatly
No CEL for GP issues Id say your problem is something else
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Josh
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On my '05 I had two bad glow plugs, with no codes on my scan gauge 2 or my slightly better OBD2 scanner. Also no CEL, and glow plug light acted normal. Just sayin'...
Andrew B.
Edit: And it wouldn't start at 30°, after replacement, it started fine at 20°... Haven't had a chance to test it at colder temps yet...
Andrew B.
Edit: And it wouldn't start at 30°, after replacement, it started fine at 20°... Haven't had a chance to test it at colder temps yet...
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Hotshot
Joined: Apr 2010
Posts: 19,061
Likes: 238
From: Saratoga Springs,UT
On my '05 I had two bad glow plugs, with no codes on my scan gauge 2 or my slightly better OBD2 scanner. Also no CEL, and glow plug light acted normal. Just sayin'...
Andrew B.
Edit: And it wouldn't start at 30°, after replacement, it started fine at 20°... Haven't had a chance to test it at colder temps yet...
Andrew B.
Edit: And it wouldn't start at 30°, after replacement, it started fine at 20°... Haven't had a chance to test it at colder temps yet...
I could very well Be Wrong about the CEL and Glow Plug Problems
Maybe the CEL only triggers for Certain Type GP Failures IDK enough to say for shure or maybe it has to fail so many times in a certain amount of Drive Cycles???
I am 98% shure LOL that Glow Plugs are considered an Emisions Component
Had to give myself a 2% error margine LOL
I dont mind being wrong and very well could be since 2 of you Had Glow Plug Problems and NO CEL
Thread Starter
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Logistics Pro
Joined: Jul 2004
Posts: 4,859
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From: Middleville, MI
alot of unburnt fuel came out the tailpipe between cranks, and when it finally did start it had a single, healthy little black puff. only took a couple seconds to smooth out and idle nicely.
like i said, no CEL or codes on the SGII.. is Autozone's diagnostic computer any more intuitive or would that require a dealer-caliber piece of equipment? i would be curious to hear if anyone can confirm either way the glow plug / CEL discussion above.
Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
On my '05 I had two bad glow plugs, with no codes on my scan gauge 2 or my slightly better OBD2 scanner. Also no CEL, and glow plug light acted normal. Just sayin'...
Andrew B.
Edit: And it wouldn't start at 30°, after replacement, it started fine at 20°... Haven't had a chance to test it at colder temps yet...
Andrew B.
Edit: And it wouldn't start at 30°, after replacement, it started fine at 20°... Haven't had a chance to test it at colder temps yet...
One that I found is fuel level sender faults. The information center says
there is an error (data error I think)but the SGII would not show or clear it.
I ended up getting my Snap-On tool out to clear it.
Sean
Lead Driver
Joined: Jun 2007
Posts: 6,757
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From: Corvallis, OR
I'm pretty sure I have a glow plug issue on my '03. Smokes white with fuel until it warms up, but still runs great. I don't have any codes showing up, and I scanned with an AutoEnginuity with the Ford bundle.
