cycle the prime sequence twice.. (ign on-off-on) does it start better?
pump the accel twice, does it start better?
If it does WORSE after that, trying flooring the accel the next day.
REmember the ECM mimics the actions of a carburetor .. and there's a reason
Thats why you dont touch the accel to start, normally.
Many Sport Tracs eventually develop a sticking Idle Air Control valve
(IAC). This will cause the engine to idle poorly or not at all, unless you
hold the gas pedal down. You can fix it by removing the IAC, and cleaning
and lubricating it. You can find discussions about this -- and instructions
on fixing it -- at http://www.mysporttrac.com (just use the website's
This may not be the cause of your problem, but I'd almost bet that it is.
My wife's ST started out having difficulty starting when cold, which
quickly progressed to no idle at any temperature. I found the IAC to be
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