--- In subaruvanagon@..., "dmz" <dmzwesty@...> wrote:
This is a 94 ej22 in a 4 speed van.
................. only noticed it when the engine is warm.
Engine spins nicely from the starter without any hint of starting.
No sputtering, coughing etc, just like spinning it without any plugs.
Gas pedal all the way down and held there, after about 10 long seconds it sounds like one cylinder starts to fire, then 2.
With the pedal held down, after a total of 20-30 seconds of cranking the rest come on, sputtering, then full on.
.......................................
Sounds like a classic case of over fueling. When you hold throttle in WOT the ECU runs in 'clear flood' mode. That is, the injectors do not fire until engine rpm's reach a target speed of over 600 rpm or so, or when you reduce throttle opening to control rpm's as the engine fires up.
I would check injectors for weeping or over pressure from the fuel pressure control. This will mean measuring the fuel pressure.
After shut down warm, you need to watch pressure and see if it drops to zero too quickly. In a warm engine, to little fuel pressure will allow the fuel to boil in the injection system and when you restart a warm engine, all that's being injected is vapor....a very lean mixture.
Most FI systems hold around 25 to 30 psi fuel pressure for 20 minutes to prevent vapor lock re starts.
regards
dk
