Warning light on dash

You could be experiencing something like turbo lag!

I have that water fuel light as well ............. thats not it

just says ..... Warning ..........
in yellow on dash only comes on after I have had my foot into it, and then goes out once I let out of it for a few seconds

Everyone here seams to think its air flow. I had a 1998 diesel that would flash an amber light (water in fuel) for just a second or two when ever I got hard into the throttle. Never did figure out why because my fuel and filers were clean. I blamed it on the low sulfur fuel I had to use but never really knew why.

Many diesels have a system built in that when engine tries to suck air the small device operates to indicate basically the lack of air flow through the filter. I linked a photo of one earlier.
Do you have a turbo?

^^^. Like what kind of air intake problem. What makes you say that?
Thanks. What should I look for?

Still sounds like a problem with air intake!

Has all new filters ..... It only happens when I acellerate quickly for several seconds. Once I let out and cruise along for a few more seconds at a reasonable speed the light then goes right out.

Sounds like an air problem to me, or something with the vac system.... Need more info if possible.

Check your fuel filters. They may need changing.

Nothing?