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Clear flood mode ?

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Old Jan 2, 2008 | 10:51 AM
  #1  
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Default Clear flood mode ?

I think I read this in a workshop manual, but I'm not sure anymore, so : do our 993's have a "clear flood mode", meaning that if cranking at full throttle the DME shuts off the injectors to vent a flooded engine ? I know that my Saab 900 has that feature and I use it to build up oil pressure before I start an engine that didn't run for a couple of weeks.

Many thanks and happy 2008

Alain from Luxembourg
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Old Jan 2, 2008 | 12:22 PM
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Alain, don't have an answer to your question, but I'd just like to say I have been to your lovely country in 1968 and it has always been a wonderful memory. I wonder how much it has changed since then.
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Old Jan 2, 2008 | 12:29 PM
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Good question and I have no idea. I have been using the "remove the DME and crank" method of years so, if this works, I am interested in knowing!

Cheers,

Mike
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Old Jan 2, 2008 | 05:43 PM
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Mike ,

Using "I have been using the "remove the DME and crank" method means no spark , no injector fuel squirt so absolutely no need for anything else .
In my book you are absolutely spot on !! Well done .

Geoff
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Old Jan 4, 2008 | 05:09 AM
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Larry,

in 1968 I was 6 years old, so I can't remember that well but afaik there was no speed limit at that time......more seriously : I think a lot of things have changed, Luxembourg being "the heart of Europe" and nearby 50% of the working population is coming from abroad every morning.

As to my initial question : I actually also pull the DME, but it would be much easier if I could just floor it and it would not start. So the question remains : will a 993 start if cranked at WOT and not been driven for a couple of days ?

Alain
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Old Jan 4, 2008 | 12:54 PM
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There's one way to find out...
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Old Jan 4, 2008 | 01:09 PM
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Originally Posted by brucec59
There's one way to find out...
My thoughts exactly ...
Were I motivated to try it, I would pull the stunt on a well warmed and oiled engine: that way, my unbridled ignorance of the experiments consquences have a lesser opportunity to graduate to full fledged stupidity ..... like bouncing off the rev limiter on a cold engine before the toes release the pedal
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Old Jan 4, 2008 | 01:09 PM
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Originally Posted by brucec59
There's one way to find out...
That's what I was thinking! Slam the pedal to the floor and try starting it. It's not like you have to keep it at WOT if it starts. Might be best to have a warmed-up engine before attempting, though.

That procedure is that same as what one does with flooded carbs. Geez, I'm getting old.
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Old Jan 4, 2008 | 01:15 PM
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Originally Posted by Garth S
My thoughts exactly ...
Were I motivated to try it, I would pull the stunt on a well warmed and oiled engine: that way, my unbridled ignorance of the experiments consquences have a lesser opportunity to graduate to full fledged stupidity ..... like bouncing off the rev limiter on a cold engine before the toes release the pedal
Dammit, Garth, you beat me to it by a few seconds. Good to know that great minds think alike, though. You are very wise and, no doubt, good looking.
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Old Jan 4, 2008 | 02:29 PM
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I vaguely remember some advice about NOT flooring a fuel injected car when starting it. IIRC it had to do with a potential backfire that could cause problems upstream in the intake (like the airflow sensor). Maybe it's just an old wive's tale though. I'm very happy to let someone else try this experiment.
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Old Jan 4, 2008 | 04:36 PM
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Originally Posted by jimbo3
Dammit, Garth, you beat me to it by a few seconds. Good to know that great minds think alike, though. You are very wise and, no doubt, good looking.
Jim ... so it's you!! I knew I had a twin somewhere ....
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Old Jan 6, 2008 | 01:34 PM
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MythBusters reloaded !
Well, I can now tell you that it does NOT work, the engine will start !! So I will have to pull the DME or tap into the harness if I want to install a switch in the cabin.

Alain
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