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02-05-2018
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Newbie
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Join Date: Mar 2014
Posts: 42 What Jeep do I drive?: WG
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Liked 9 Times in 8 Posts
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2.7L CRD Misfiring Badly at low RPM
Hey fellas,
Have developed a bad misfire at idle/low RPM over the last few days at Straddie last weekend. Grew from a bit of surging at idle to full-on skipping a few cylinders, and crazy hard to start. OK-ish once up at speed.
I've done some reading, but not had much of a chance to investigate on the vehicle itself nor checkout codes yet.
Any obvious things to look out for? Air-leaks in fuel lines? EGR or SWIRL etc?
Your collective wisdoms are appreciated!
__________________
03 Grand Cherokee Overland 2.7L CRD; Quadradrive; 2" Spacer Lift; HD Adj Contrl Arms, JK Wheels
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02-05-2018
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Lowranger Shocker
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Join Date: Jul 2017
Location: SE Qld
Posts: 1,509 What Jeep do I drive?: WG
Likes: 171
Liked 273 Times in 220 Posts
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You should be able to see bubbles in the LP fuel lines, if that's the issue. I'd be checking fuel rail pressure. Any smoke?
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02-05-2018
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Rock Munki
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Join Date: Aug 2009
Location: Castle Hill, NSW
Posts: 2,136 What Jeep do I drive?: WG
Likes: 11
Liked 300 Times in 245 Posts
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I've seen this before and for me it was a faulty fuel pressure regulator which is located at the southern end of the fuel rail. If you check for codes I'd expect to see a P-1130.
Not a hard fix, or a overly expensive.
It may also be air in the fuel lines due to bad rings on the file supply hoses, check for air in the lines to let you know if that's the problem.
Jason
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03-05-2018
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Newbie
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Join Date: Mar 2014
Posts: 42 What Jeep do I drive?: WG
Likes: 16
Liked 9 Times in 8 Posts
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Quote:
Originally Posted by JeanLuke
....Any smoke?
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of course
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03 Grand Cherokee Overland 2.7L CRD; Quadradrive; 2" Spacer Lift; HD Adj Contrl Arms, JK Wheels
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07-05-2018
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Rock Munki
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Join Date: Aug 2009
Location: Castle Hill, NSW
Posts: 2,136 What Jeep do I drive?: WG
Likes: 11
Liked 300 Times in 245 Posts
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Quote:
Originally Posted by RichRen
of course
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Any worse than before the problem?
Have you tried a good dose of injector cleaner to see if that helps with the problem?
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13-05-2018
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Newbie
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Join Date: Mar 2014
Posts: 42 What Jeep do I drive?: WG
Likes: 16
Liked 9 Times in 8 Posts
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Quote:
Originally Posted by bodgie
I've seen this before and for me it was a faulty fuel pressure regulator which is located at the southern end of the fuel rail. If you check for codes I'd expect to see a P-1130.
Not a hard fix, or a overly expensive.
It may also be air in the fuel lines due to bad rings on the file supply hoses, check for air in the lines to let you know if that's the problem.
Jason
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Hi Jason, having trouble finding this part on ebay etc. Where did you get yours from?
Sent from my CLT-L29 using Tapatalk
__________________
03 Grand Cherokee Overland 2.7L CRD; Quadradrive; 2" Spacer Lift; HD Adj Contrl Arms, JK Wheels
Last edited by RichRen; 13-05-2018 at 09:05 PM.
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13-05-2018
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Newbie
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Join Date: Mar 2014
Posts: 42 What Jeep do I drive?: WG
Likes: 16
Liked 9 Times in 8 Posts
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Never mind found it on alibaba
Sent from my CLT-L29 using Tapatalk
__________________
03 Grand Cherokee Overland 2.7L CRD; Quadradrive; 2" Spacer Lift; HD Adj Contrl Arms, JK Wheels
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