Intermittent missing @ idle - Ford Powerstroke Diesel Forum
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post #1 of 7 Old 03-12-2012, 06:04 AM Thread Starter
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Intermittent missing @ idle

I have a Job 1 F350 with Spartan 250 tune running, DPF Delete. At idle I get what I would desribe as a missfire or stumble. It reoccurs every 20-30 seconds, the FRP drops for a split second, then everything goes back to being fine. Could it be EGR cycling? Bad injector? Anyone else feel this?

Thanks
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post #2 of 7 Old 03-12-2012, 08:27 AM
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I thought mine was also. This was about the same time I was having my truck smoke like a locomotive during regen. I tried deisel kleen and it smoothed it out but didn't stop the smoking. I deleted to stop the smoking.

Try diesel kleen

2008 F250 KR 4x4 Crew cab H&S mini maxx, s&B cai; dpf/cat delete; EGR delete; Firestone Airbags
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post #3 of 7 Old 03-12-2012, 11:09 AM
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Monitor your EGR percentage while at idle. It should be under Commanded EGR or something like that. You will see it cycle every 20-30 seconds to about 30-35% open. The exhaust note will change.

Jeff Dodd
spartan_jeff12@yahoo.com

2012 Ford F-250 Lariat CC/SB

Mods - Spartan tuned via laptop, 4" AFE stainless exhaust system, 2.5" PMF BMC leveling spacers, 3" PMF lift blocks, Fox Racing 2.0 shocks, Recon smoked mirror & cab lights
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post #4 of 7 Old 03-12-2012, 11:14 AM Thread Starter
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Ok, will do, and check back,

but the bigger question would be, should I feel it cycling? I mean when it stumbles for the split second, you can feel it, and hear it. It would seem like an 8 cylinder diesel shouldn't sputter when a load like this is applied (at least I wouldn't of thought so)
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post #5 of 7 Old 03-12-2012, 11:16 AM
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Do you have any codes?

Jeff Dodd
spartan_jeff12@yahoo.com

2012 Ford F-250 Lariat CC/SB

Mods - Spartan tuned via laptop, 4" AFE stainless exhaust system, 2.5" PMF BMC leveling spacers, 3" PMF lift blocks, Fox Racing 2.0 shocks, Recon smoked mirror & cab lights
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post #6 of 7 Old 03-12-2012, 11:18 AM Thread Starter
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Nope no codes
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post #7 of 7 Old 03-12-2012, 12:00 PM
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Mine is doing something similar and I'm tuned by SCT....

2009 Subaru WRX Premium
Type RS BOV
CAI
Muffler Delete



Had to park it with some real diesel muscle....
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