Question about 1997 Ford F150 Regular Cab

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98 f-150 check light po-170&po171 help - 1997 Ford F150 Regular Cab

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!70 and 171 are lean mixture codes, I'd start by changing the fuel filter. It's located under the truck, inside the frame rail, just about right under the drivers seat. The fuel lines are under pressure so you have to relieve the pressure before you disconnect the lines. You can let the vehicle sit for at least a 1/2 hour with the key off, or find the pressure test port on the fuel rail (on top of the engine) and bleed the pressure off there. You are going to need a special tool(s) to disconnect the lines. Helpfull hint push the line on to the filter while you insert the release tool(s), a little WD-40 or penetrating oil helps. Keep in mind your dealing with gasoline, keep your hot trouble light far away so there is no chance of gas splashing onto the hot bulb.

Posted on Nov 19, 2009

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