if I suspect fuel getting in when it shouldn't ..
I would go directly the seals at the bottom of the bowl each injector
sits in .
If those leak ..
and they do deteriorate ..
fuel goes right into a cylinder . or cylinders. ..
any time there is fuel pressure. ..
engine doesn't even have to run.
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On 5/5/2012 8:11 PM, Don wrote:
--- In subaruvanagon@...
<mailto:subaruvanagon%40yahoogroups.com>, "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
