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Old 10-31-2017, 12:20 PM   #1

Name: 03five9
Title: Rookie
Status: Not Here
Join Date: Sep 2017
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Posts: 17
03 lope

Hey was wondering if anyone could help me out. I have an 03 cummins w/ afe intake and afe blade runner GT turbo. My truck has been loping on and off for over a month now, if I put it in gear itís smooth(Auto) if I turn the ac on itís smooth compressor kicks off it lopes kicks back on itís smooth. Also lopes when decelerating if thereís no load. No smoke 💨 great mileage took a 10k lb 5 horse trailer to globe and back to see if injectors were needing to be cleaned that didnít change anything. Also no change with tuner hooked up or not. Only thing Iíve replaced is the FCA with no change. Idle is steady @800 even when it lopes. Any help is appreciated. Has NO CEL or codes hooked to snap on scanner. Cleaned a whole bunch of sensors and connections last weekend.

Old 06-18-2018, 07:55 PM   #2

Name: Tim@usfleet
Title: Master EVT
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Join Date: Jan 2018
Location: Long Island, NY
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What tuner is on the truck? If it's custom tuning I'd look at the PID data for the main duration. If the duration drops below like 200-high 100s it doesn't fire the injectors. Pretty much the ECM saying that it's useless to fire at that low of a duration. Had it happen on my truck when messing around with different tuning files. Bumped up the duration a little bit and the lope at idle stopped.

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