Noise when accelerating

FORD F-150
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CAROLLEE
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Hello I have a 1999 Ford F-150 V6 4.2L, 2wd with no fluid leaks. It has about 86500Miles on it. I recently had my service engine light come on and when I went to get Diaganostic at Autozone it came up with two codes on it that said vehicle is too lean. I cleaned my MAF, Changed my PCV and changed my Idle control speed valve and it seem to of gotten better. But now the light is back on and now I'm hearing a strange noise when I accelerate at a speed of 65pmh. Any help would be appreciated. Thanks :D
Aug 6, 2007 at 3:35 PM
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2CARPRO JACK
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Have it scanned again. Check for vacuum leaks, especially the pcv line where it attaches to the intake, they go bad and will create a lean condition
Aug 7, 2007 at 8:04 AM