water in fuel light stuck on - Ford Powerstroke Diesel Forum
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post #1 of 2 Old 06-29-2007, 09:46 PM Thread Starter
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water in fuel light stuck on

I have a early 99 f350 7.3 and recently upgraded to a year 03 model 7.3 PCM. It made a huge difference, and the truck drives much nicer. My only problem is as soon as I started the truck with the 03 PCM the water in fuel light was on, and has been on ever since. I have drained the fuel bowl twice but it made no difference. The weird thing is that the light has never been on with the original PCM, and came on as soon as the new one was put in. Everything else works fine with the newer PCM. I changed my fuel filter about 1000 miles ago and the housing was very clean inside. Anyone have any idea why this might be happening?
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post #2 of 2 Old 06-30-2007, 12:44 PM
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might need to swap a few pins at the pcm plug id get wiring diagrams for both years and see if any pins need to be moved to different locations

00 f250 psd crew cab lariat 4x4 - sold
02 f250 ccsb lariat 4x4 - 12v conversion with nv4500
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