Question about 1998 Ford Mustang
Did the 4 mechanics read an code's in the engine computer . I'am assuming they had a scan tool hooked up to the vehicle . You probably won't know the answer to these questions . What was the data for the fuel trim's ,short an long term , are the O2 sensors switching normally , What is the fuel pressure ,did they check it ? What kind of mechanics were they ? Dealer , independant , back yard etc.... Without testing i'm not going to supply you with any guesses.
FORD V8 SYSTEM LEAN BANK 1 AND BANK 2
Posted on Dec 31, 2017
Oxygen sensors may be reading false rich making it go too lean .
Posted on Dec 31, 2017
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Posted on Jan 02, 2017
Ther is a air Idle control valve located on the side of the throttle body. unplug it remove it spray it and clean it with carb cleaner replace it plug it back in and you will be a Happy person again.
Posted on Feb 01, 2009
Sounds like bad injectors, bad O2 sensors, and or too much fuel psi. Check the fuel psi against what the service manual says. If the fuel psi is too high, your regulator is bad. If the fuel psi checks out ok, you likely have a bad O2 or bad fuel injector(s).
Posted on Apr 15, 2009
SOURCE: 04 mazda 6 lean condition
sounds like you have a vacuum leak. It is sucking in extra air from somewhere. possibly the intake manifold gaskets. The extra air coming in fools the computer / o2 sensors to believe it has a lean mixture then it will try to compensate for the lean mixture and add more fuel.
Posted on Oct 30, 2009
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