Loss of power while towing... - Ford Powerstroke Diesel Forum
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Old 08-09-2013, 02:01 PM
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Loss of power while towing...

I have an '05 6.0 with 4" down tube, no cat, or muffler.... While towing our tow hauler yesterday after about an hour it wouldn't go over 10# of boost, or barely get over 50mph downhill and was a real POS for any pull. When this happened in the past, I pulled codes and it said low exhaust back pressure... Well, yesterday when it happened, I ran it for a bit and pulled over, turned the truck off, unplugged the CPU for 30 seconds and I was back on the road and it ran normal.

So my question is, do I need to have my cat to have the necessary back pressure while towing to keep the CPU from "tuning it down?" Any feedback would be appreciated.

Thanks for the help

-Al
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Old 08-09-2013, 05:20 PM
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Quote:
Originally Posted by BigAlSkid View Post
I have an '05 6.0 with 4" down tube, no cat, or muffler.... While towing our tow hauler yesterday after about an hour it wouldn't go over 10# of boost, or barely get over 50mph downhill and was a real POS for any pull. When this happened in the past, I pulled codes and it said low exhaust back pressure... Well, yesterday when it happened, I ran it for a bit and pulled over, turned the truck off, unplugged the CPU for 30 seconds and I was back on the road and it ran normal.

So my question is, do I need to have my cat to have the necessary back pressure while towing to keep the CPU from "tuning it down?" Any feedback would be appreciated.

Thanks for the help

-Al
Are you running gauges? What was your ECT and EOT? Are you sure it wasnt running hot and defueling?
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Old 08-12-2013, 06:33 AM
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My EOT was around 200 and the EGT was 980.
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