2003 7.3 check engine light while towing ? - Ford Powerstroke Diesel Forum
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Old 08-07-2011, 04:45 PM
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Unhappy 2003 7.3 check engine light while towing ?

Hi, I have a problem I hope someone can give advice on, when towing my 5th wheel and I come upon some uphill roads I get a engine light on. It does not affect the power of the truck or anything and usually when I get back on level road it goes out after a couple minutes. I had it scanned today at parts store and they told me it was a P1211 code, injector pressure higher or lower than desired. Anyone out there with any advice would be appreciated.
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Old 08-07-2011, 05:00 PM
Other vehicle is an F250
 

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Got it chipped?
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Old 08-07-2011, 05:04 PM
Other vehicle is an F250
 

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Mine does this because after my mods it can handle more fuel than I can deliver to it. Soft code and probably nothing to worry about. I see it every time I get down hard on the go pedal.
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Old 08-09-2011, 04:46 AM
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I was told there was a chip in it when I bought the truck,but I have had it for several years and this problem just started occurring when I tow my 5th wheel. I hope it's nothing to worry about, but that light is there for a reason.
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Old 08-09-2011, 10:09 AM
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Your running out of HPO..which will then lose atomazation pressure= lose of HP, MPG's and more smoke. Typical of a chiped split shot Inj. 2 ways to fix this..stage 1 single shots and custom tunes or a better HPOP..like a SRP1. Single shots will get you more HP and little better MPG's.
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Old 08-11-2011, 11:25 AM
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I had a very similar problem with my 02 7.3 while towing my Jeep on trialer. Only about 6000 lbs.

I have Ford AIS (I changed it to AirRaid after the trip), I have TW chip, BB Garrett Turbo and 4" exhaust. I felt the truck could not breath properly with Ford AIS. My mileage went down after I installed Ford AIS. I use to get better mileage with AirRaid.

Last edited by dieseldesi; 08-11-2011 at 11:36 AM.
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Old 08-14-2011, 12:45 PM
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Quote:
Originally Posted by CT Performance, Inc. View Post
Your running out of HPO..which will then lose atomazation pressure= lose of HP, MPG's and more smoke. Typical of a chiped split shot Inj. 2 ways to fix this..stage 1 single shots and custom tunes or a better HPOP..like a SRP1. Single shots will get you more HP and little better MPG's.
Exactly what Cary said.
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Old 08-19-2011, 11:27 AM
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Are split shots stock in these trucks?
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Old 08-22-2011, 04:40 PM
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Quote:
Originally Posted by Young-SC-Owner View Post
Are split shots stock in these trucks?
Yeah they are.
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