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2005 Mazda 6, 2.3 liter, car starts then stalls right away, engine is flooded and spark plugs are wet. No fault codes, fuel pressure is 60 psi(in spec), spark looks weak with dull orange at all plugs. Cleaned all grounds in engine bay, Vref at MAF is 5.0. Still thinking might be a bad PCM ground but very difficult to back probe this pcm. When the car stalls it seems like an electrical problem because as the engine cuts out immobilizer and CEL both turn on & off as engine cuts out. Once severely flooded won't restart. Battery voltage at coil and two other connections from coil go to PCM.
Any help would be awesome!
bwyl wrote: At coil terminal B it should read battery voltage.
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Monde means you would see 12V on the reference wire (instead of 5V) at the MAF. Start stall hmmmm.... how dirty are the throttle plates, try giving that a clean.
Throttle body had been done earlier, but anyways changed the ignition coil. Spark at plugs is now blue and we have ignition. Engine is now running! Wiggled a zillion wires and relays etc to make sure I hadn't inadvertently repaired it another way. Road tested OK other than the fact now some TCM codes and in limp mode 3rd gear! I'll start a new post if I cant repair this. Thanks.
