[boatbuster]

Just got back from a 700 mile trip with my 02 AWD Astro pulling a 2500 pound enclosed trailer behind it. About 300 miles into the trip the engine light came on and stayed on for the duration of the trip. I did pull through some pretty hilly terrain for about 150 miles prior to the engine light coming on and on some hills I did use the tow button when taking off. When I got home, I unhitched the trailer and went out to pick up a few things. When I came out of one store I noticed the engine light was no longer on. I don't know if towing the trailer had anything to do with this. So I plugged my code reader into the van and got a P0300 code - Random/Multiple cylinder misfire detector. Also got fuel sys1 and fuel sys2, OL, drive conditions.

The van is equipped with a towing package that has tranny and engine oil coolers. Temp and oil pressure were normal for the whole trip, the only difference is that I was doing about 14 miles per gallon compare to the 18 to 20 I usually get without the trailer.

Can anyone tell me if there is something I should check? Would the fact that I pulled that trailer have anything to do with it? Should I worry about this?

I replaced the complete ignition this spring, including a new distributor, also replaced the cat converter in march of this year. The van runs only on Castrol Sythetic 5W30 oil. Tranny, transfer case and diff fluids were changed over the winter.

Thanks for any help!