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Unread 11-05-2007, 08:20 AM   #1
s68139c
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1991 YJ Wrangler 
 
Join Date: Dec 2006
Location: South Nisku
Posts: 54
CRD long crank time

Got an 06 CRD.... when after sitting overnight when abient air temp is below 10 degrees C, it will crank for around 11 seconds before starting, then run rough and smoke for a few seconds then clear up and run fine. Air/fuel filter is new, new glow plugs, injectors all tests ok, fuel pressure ok. But still cranks long time... Anyone run into this before?

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Unread 11-05-2007, 12:10 PM   #2
indianrefining
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Quote:
Originally Posted by s68139c
Got an 06 CRD.... when after sitting overnight when abient air temp is below 10 degrees C, it will crank for around 11 seconds before starting, then run rough and smoke for a few seconds then clear up and run fine. Air/fuel filter is new, new glow plugs, injectors all tests ok, fuel pressure ok. But still cranks long time... Anyone run into this before?
Are you waiting for your glow plug light to go off?
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Unread 11-05-2007, 02:49 PM   #3
merlinTec
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HI
Check the fuel heater plug on the filter housing, unplug it and check to see if it’s burnt and also check for any signs of fuel in the socket. This is a new issue and the plug can’t take the amps the heater pulls and so over heats and melts. This lets fuel out and air in, you could find if you pump the prime pump fuel will come out of the plug. I did an 05 lib today with the same fault as you.
Regards,
Merlin
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Unread 11-05-2007, 02:54 PM   #4
chadhargis
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I've always thought this was normal behavior for a diesel. They take a little while longer to start when it's really cold outside. They are compression ignition, which relys on heat created by the compression of the fuel/air mixture. If it's really cold, it will take a little while to get the combustion chamber warm enough to fire. Of course, when it does, you've got some raw, unburned fuel in your exhaust and it will smoke.

I wouldn't worry about it. If it's that big an issue, plug in the engine block heater.
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Unread 11-05-2007, 07:14 PM   #5
CATCRD
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My 05 will crank in less than 2 seconds in any weather. Check what merlinTec said and also suggest to the dealer that your FCV may be sticking closed. It's like a throttle butterfly in your intake.
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Unread 11-05-2007, 07:20 PM   #6
s68139c
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Quote:
Originally Posted by merlinTec
HI
Check the fuel heater plug on the filter housing, unplug it and check to see if it’s burnt and also check for any signs of fuel in the socket. This is a new issue and the plug can’t take the amps the heater pulls and so over heats and melts. This lets fuel out and air in, you could find if you pump the prime pump fuel will come out of the plug. I did an 05 lib today with the same fault as you.
Regards,
Merlin

thanks for the input Merlin,We figured there was air getting in so we installed clear lines on the filter housing and let sit overnight, in morning there was large air bubles(2inches) in the clear lines. We eliminated the in tank module, no air coming from there, no cracks or holes in the lines, then we changed the filter housing. No codes in the system. Lots of power just doesn't want to start in the morning like she's hung over...

Last edited by s68139c; 11-05-2007 at 07:33 PM..
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Unread 11-07-2007, 08:57 AM   #7
JoBo
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Do a search over on LOST KJ. You have a classc air in the fuel and will need some type of lift pump. Air is seoerating from the fuel and getting trapped there. Elevated fuel pressures are causing the air to seperate from the fuel
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Unread 11-08-2007, 12:32 PM   #8
merlinTec
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Hi
Here is some pictures so you can see what to look for
Regards,
Merlin
picture076.jpg   picture079.jpg  
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Unread 08-22-2011, 04:24 PM   #9
garrettb74
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I think I'm having the same probelm.

Quote:
Originally Posted by merlinTec View Post
HI
Check the fuel heater plug on the filter housing, unplug it and check to see if itís burnt and also check for any signs of fuel in the socket. This is a new issue and the plug canít take the amps the heater pulls and so over heats and melts. This lets fuel out and air in, you could find if you pump the prime pump fuel will come out of the plug. I did an 05 lib today with the same fault as you.
Regards,
Merlin
I've had my CRD stall a couple times lately and won't start after unless I hand prime it. I did notice fuel leakage at this plug. What is the remedy?
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Unread 08-22-2011, 07:23 PM   #10
95BadBoy
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First post - welcome to JF -

Replace the fuel head & wire plug with the new revised replacement one. You should do this ASAP considering there is visible fuel leaking (not to mention the air ingress). You do not want to be a fireball on the roadway or have a three mile island type incident.

If there was no fuel leaking you could just leave the heater plug unplugged until you got to replacing it. Yours is not that way though. There have literally been a few CRDs melted to the dirt from this not being addressed. Just saying .....
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Unread 08-23-2011, 05:50 PM   #11
GDE
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The link below has the part number for the redesigned fuel head assembly. This is a must have in your case and just good preventative maintenance for anyone else.

http://www.greendieselengineering.co...s/list/76.page
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Unread 08-25-2011, 10:28 PM   #12
CodyJ5
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If its cold outside, my '05 CRD takes a couple extra seconds to turn over. Like the guy said, normal for a diesel. I agree, plug in the engine block heater.
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