1999 Ford Expedition

Engine problem
1999 Ford Expedition v-8
Two Wheel Drive Automatic 110, 00 miles

When I turn my truck on it turns off. When I get it to run it will idle VERY LOW. When my check engine light was on I got an error code 1507, after I googled I found out it has something to do with my idle. Is there a way for me to fix this problem myself. If so where can I find that info. I can't afford to take it to the dealer and pay for parts and labor.
December 16, 2007.

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