First pull up the Saluda Grade - Ford Powerstroke Diesel Forum
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Old 07-10-2012, 07:05 PM
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First pull up the Saluda Grade

First pull up the Saluda Grade (7% grade) pulling my 16K 5th wheel. Truck did well. Top the hill at about 45 mph. EOT 217, ECT 203, TFT 187...

Everything cooled off quickly after topping the hill. Only thing I noticed was about 3/4 the way up, the engine seemed to start surging. RPMs would go up and down about 500 RPMs. What would cause this?
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Old 07-11-2012, 06:52 PM
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no ideas on my surging????
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Old 07-11-2012, 07:19 PM
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Automatic or manual? If it's an automatic, I can think of about 3 things that it could be. If it's a manual, I can think of only one. I'm new here, so that's just my .02.

Good luck with the trouble shooting though!
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Old 07-11-2012, 07:24 PM
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It is an automatic.
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Old 07-11-2012, 07:34 PM
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Someone is going to jump in and tell me that I am wrong, but I would think that it was some slipping clutch packs or the torque converter. I have heard that under heavy load, your torque converter can heat up and make the fluid "froth". Please correct me if I am wrong.
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Old 07-11-2012, 08:00 PM
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For what it's worth, I think your numbers look great! I can't help on the surging though... sorry! Nice truck, btw!
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Old 07-11-2012, 08:22 PM
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What was the elevation? Dirty fuel filters or a bad fan clutch are known to cause surging type issues. Did your fan kick on full blast at any time?
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Old 07-12-2012, 04:51 AM
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I drove up Pikes Peak a few weeks ago that has an average grade of 11% and my temp were eot235 ect 225 tft170. I never pulled over and but I used the tow/haul button. No surging. sounds to me like your T.C. Slipping.
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Old 07-14-2012, 07:32 PM
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OP, did you ever find the problem?

Sent from my SGH-T769 using AutoGuide.Com Free App
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