2003 Ford Windstar MIL is on - code states "running le

2003 FORD WINDSTAR
116,000 MILES • 6 CYL • FWD • AUTOMATIC
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DANDUNN
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have tuned engine (full) recently. air cleaner is good, but will put new one in anyway. codes were cleared, keep coming back.
Idles rough until it warms, then seems better.
I want to clean the throttle body, but the haynes manual stated that there is a coating inside the body, DO NOT CLEAN! any thoughts on this? Where do I start looking for the cause of teh lean running condition?
Jun 1, 2009 at 9:10 AM
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JIS001
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There is a tech bulletin on lean codes.
Article # 3-16-1 You could have a leaking valve cover gasket causing oil to leak on vacuum hose for the fuel pressure regulator. Also they could have a leaking intake gasket which should be replaced and an upgraded pcm software is available. If it were my car I would replace the intake and valve cover gasket along with the vacuum hose for the fuel pressure regulator and clean the mass air flow sensor. As the upgrade is concern your pretty much stuck having to go to the dealer unless you can find a repair shop that specializes on domestics only? Good luck.
Jun 3, 2009 at 8:21 PM