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Old 10-04-2009, 01:58 PM
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Turbo?

I've been pulling a 40 ft gooseneck hay trailer with a 99 Cummins 5spd, and recently started using a 2001 F-350 powerstroke auto. I've noticed that when pulling 15K or 16K, or even 10K that it pulls great up until it shifts into third, then the turbo unspools, and i lose all my power, not good runnin an 8% grade... any ideas? This just normal for these, just keep it in her and get it spooled back up? Any way to remedy this situation? Is it because the auto tranny? Any pointers would be great thanks guys
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Old 10-04-2009, 02:00 PM
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Hmm not real sure, do you have any gauges set up to tell what the boost changes from?
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Old 10-04-2009, 02:01 PM
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The truck belongs to one of my coworkers, he just bought it about two weeks ago, so no gauges yet...
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Old 10-04-2009, 02:03 PM
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I see. Well I mean its possible the truck may be running out of power for some reason. If he has the extra money do a few mods to it and it will climb those hills no problem. Like if he could get gauges, intake, exhaust, and a custom chip he'd be set.
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Old 10-04-2009, 02:06 PM
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Thats what i told him, he's scared of the chip because thats how we blew up my cummins. But it was at 309,000 miles with a six gun and i blew a head on the same grade pullin 17K at 85 on 5... i can't figure out what happened. Sounds like i'd be best just to keep my boot in her after the shift, cuz she comes back, just kinda slow, and by then your kinda S.O.L
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Old 10-04-2009, 02:08 PM
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Yeah it must just be a hell of a hill.
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Old 10-05-2009, 04:59 AM
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You could try a hot side MAP Mod....it will show more boost to the MAP sensor and thus deliver more fuel. I've done it my truck and it does make a difference on the low end.
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Old 10-05-2009, 05:06 AM
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I've never heard of that mod. hmmmm
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Old 10-05-2009, 05:26 PM
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CSIPSD did the write up on this...Just drill and tap the hot side of the spyder about an inch away from the IC pipe and use a new piece on 1/4" air line to connect the map to the new port..and plug the old port. This mod just gets rid of the pressure loss, due to the intercooler, that the MAP reads.
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Old 10-05-2009, 05:32 PM
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don't mean to hijack but...anyone else know much about this hot side MAP mod?

here's that original post:
A little reroute of the MAP sensor tubing...

Last edited by daveyburt; 10-05-2009 at 05:38 PM.
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