Check fuel pressure with a mechanical gauge and spark with a spark tester.
Fuel pressure should hold at 40 or so psi when pump turns off, if not then check fuel pressure regulator vacuum line for the presence of gas which indicates a ruptured diaphram.
Also check the idle air control valve, remove and clean.
Generally on FI engines flooring the throttle (ign on, not running) will put ECM in "clear flood" mode, which will reduce fuel injector pulse and provide less fuel.
Don't rule out ignition as a possible cause (weak).
Friday, January 30th, 2009 AT 10:56 AM