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Old 07-17-2013, 10:19 PM   #2 (permalink)
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First step is to determine what you are missing on the restart.

Fuel, spark or air. Probably not air, but I would check to see if you have spark and proper fuel pressure.

A pressure guage on the fuel rail and a piece of wire from the coil to the radio antenna.

Switch to AM radio and you will get strong spark induced static in the radio.
Set up the gauge so you can read it from the drivers seat, probably tucked under a wiper arm.

This way you have an audible and visual measurement of fuel pressure and ignition signal strength. See which one is off or weak on the restart. Bump starting a FI engine, the engine should restart almost instantly.

Could be something like the fuel pressure regulator leaking into the intake manifold so you are too rich on your restart, or a weak ignition signal that does not become obvious except on a restart.

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