Ignition on, engine floods - Defender Source
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Old April 25th, 2013, 10:20 PM
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Chris Davis
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Ignition on, engine floods

If any of you leave your ignition on, like listening to the radio, does your engine flood? Mine always does. If my key is on over a minute, I have truly tough time starting the truck for a few. I have used two sets of injectors so it probably isn't a leaking injector and when I swapped them, I also swapped the fuel rail and pressure regulator, so probably isn't that. I have several ECU's and swapping them doesn't change anything. I am thinking it may be something related to my fuel return--Maybe it is blocked and the excess pressure goes into the engine somehow? Or does everyone's do this (which I doubt)...
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Old April 25th, 2013, 11:03 PM
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Ian Gregory
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Are you sure its flooded and not starved? Based on your other thread its possible your pump could be letting the pressure drop and you don't have enough pressure in the rail to start it? Worth a check.
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Old April 25th, 2013, 11:07 PM
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When you turn the key, the fuel pump should run for a few seconds and then turn off. If you fit a standard relay in place of the silver relay, it will just turn on and keep running which could cause your issue or maybe your silver relay has had it and sticks on.

Another issue is that you should not leave the truck all the way on as it causes the coil to heat up. That could be part of the issue. If you want to listen to just the radio, you need to turn to the first not the second position.
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Old April 25th, 2013, 11:09 PM
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Chris Davis
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Awesome suggestion-- I'll check it out. Thing is, the truck can sit for a month and start first try. Can you think of a reason why it may starve with the ignition on (versus just sitting with it off)? It would help think of what to check...
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Old April 25th, 2013, 11:10 PM
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George
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Sounds like you need the updated PROM chip. Check out this thread for more info: http://www.defendersource.com/forum/...eferrerid=7260
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Old April 25th, 2013, 11:16 PM
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Chris Davis
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I am running a custom prom chip from Pendy specifically for the 4.6. We tried trouble shooting it a couple years ago (to no avail). The condition also happens with a 4.2 cold start PROM and the original 3.9 one, swapped into 3 different ECUs. SO FRUSTRATING!
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Old April 25th, 2013, 11:24 PM
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Quote:
Originally Posted by Davis View Post
Awesome suggestion-- I'll check it out. Thing is, the truck can sit for a month and start first try. Can you think of a reason why it may starve with the ignition on (versus just sitting with it off)? It would help think of what to check...
Just what I mentioned above. There is no timer on the ignition as to sending power to the coil so if you put it in position 2 (all on just not hitting the starter) the coil keeps getting juice. I would not recommend trying it, but the coil will get very hot after a short while. That could be the issue. Neither of my suggestions would have any impact on long term sitting and then starting.

In other words don't do what you are doing it is bad for it!
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Old April 27th, 2013, 03:56 PM
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Thanks--I'll try and not do that anymore.
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