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IT'S FIXED !!! HELP : Engine barely runs ! (C240) after battery dis-connect

Old Feb 19, 2006 | 10:31 AM
  #1  
MwCH's Avatar
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Default IT'S FIXED !!! HELP : Engine barely runs ! (C240) after battery dis-connect

Well, I dis-connected the battery in hopes of re-setting the ECU and take it out of "security mode" and now the car starts but the engine just aberly runs !!! Help car is now un-drivable !! :-(((
 
Old Feb 19, 2006 | 11:15 AM
  #2  
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Default RE: HELP : Engine barely runs ! (C240) after battery dis-connect

Do it again. Disconnect ground cable first, then positive. Touch the two together for 15 seconds. Reconnect positive cable first, then negative.
 
Old Feb 19, 2006 | 11:53 AM
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Default RE: HELP : Engine barely runs ! (C240) after battery dis-connect

Well what is that supposed to do ?
 
Old Feb 19, 2006 | 11:56 AM
  #4  
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Default RE: HELP : Engine barely runs ! (C240) after battery dis-connect

Lugnut - Thanks for the reply ! never mind why it works : I'l go'n do it right now ! be back in 15 minutes with results ....
 
Old Feb 19, 2006 | 12:08 PM
  #5  
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Default RE: HELP : Engine barely runs ! (C240) after battery dis-connect

I did what u said lugnut : disconnected Negative, then positive connected 2 together 15 seconds thenput pos on then neg. NO CHANGE car still starts but will not rev ..... help can't even move car to my garage !
 
Old Feb 19, 2006 | 12:21 PM
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Default RE: HELP : Engine barely runs ! (C240) after battery dis-connect

will start but won't rev?

it must rev first before starting.

clean those battery connectors. nust be poor contact.
 
Old Feb 19, 2006 | 12:33 PM
  #7  
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Default RE: HELP : Engine barely runs ! (C240) after battery dis-connect

No probleme with battery connectors : this is an ECU issue for sure ! engine starts but just idles will take a few revs but then barely idles. help !
 
Old Feb 19, 2006 | 06:31 PM
  #8  
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Default RE: HELP : Engine barely runs ! (C240) after battery dis-connect

I think it might be mechanical. I don't know what, though It's takes just a little bit of time or miles for ECU codes and modes to set. The ECU won't instantly be in limp mode after a reset.

When the car first did this, had it been sitting for over a day?
 
Old Feb 20, 2006 | 04:44 AM
  #9  
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Default RE: HELP : Engine barely runs ! (C240) after battery dis-connect

No, the car was driven the day before, like I said all was ok (no warning lights on the dash) except that gas mileage was starting to go up and idle wasnot perfect - nothing bad but it would stumble some especialy when cold.

All I did was dis-connect then re-connect the battery....
 
Old Feb 20, 2006 | 06:26 AM
  #10  
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Default RE: HELP : Engine barely runs ! (C240) after battery dis-connect

check pressure from service valve. maybe blocked fuel filter.

i know your engine and i never heard such problem with ecu before.

[IMG]local://upfiles/1/EFC7CEF4D7FC448EAACB715BBA8C9CB1.jpg[/IMG]
 

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