Mechanics

FORD F-150 SENSOR PROBLEM

1997 Ford F-150 • 98,000 miles

I'm experiencing a lack of power and misfiring at any speed above idle.
I have replaced the plugs, boots, throttle position sensor, IAT sensor, and checked visually the catalytic converter.
The fuel pressure is 40lbs. At the rail. It shows no trouble codes.
What am I missing?
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Dickdiamond
April 1, 2013.




Try cleaning the MAF sensor and see what happens-

Tiny
Rasmataz
Apr 1, 2013.
I already did, wasn't showing any contamination. Pulled exhaust off of manifold thus taking catalytic converter out of system. It is still misfiring and running extremely rough. Can you think of anything else to try?
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Tiny
Dickdiamond
Apr 1, 2013.
Could be the EGR and PCV valve. Go to this link: http://www.2carpros.com/articles/engine-misfires-or-runs-rough

Tiny
Rasmataz
Apr 1, 2013.

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