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Fuel Pressure Gauge/ No Start Issue

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Old 08-19-2011, 07:31 PM
  #91  
theiceman
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Well that is encouraging .. so what now ... do a thorough test and back the parts out one at a time ?
Old 08-19-2011, 08:00 PM
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Originally Posted by theiceman
Well that is encouraging .. so what now ... do a thorough test and back the parts out one at a time ?
Exactly. I didn't swap out the ICV (idle control) because it's fairly new and the problem existed before it went in. Rusnak says to put my AFM back in next and see if it still fires at first tap. I've been out several times now and it fires right up.

...and if you are curious about all the drugs I've got the worst case of Hemochromatosis that my HMO has ever seen and the pain is catching up to me:

http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0001368/


http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0001458/
Old 08-19-2011, 08:34 PM
  #93  
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wasn't curious .. but im just like that

what do you think this is the Porsche club ? this is rennlist .. "it's not about the people .. just the cars "
Old 08-19-2011, 09:03 PM
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It's sounding more and more like the ECU. Obviously it's not ok to jump to conclusions, but....

I think the next step is to change out the ecu back to your old one.

The reason is that a bad afm can fry an ecu in a second. Same with a bad tach. If your afm fried your ecu, then that's why I said to change them both (they are both confirmed good parts). So, you change out the ecu back to your original, leaving the known good afm in there. If it fails to start each time, then you can suspect your ecu. On the other hand, if the car starts each time, then it could be the afm. If you put the new ecu back in, then make sure that you keep the known good afm in there as well.
Old 08-19-2011, 09:55 PM
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Originally Posted by rusnak
It's sounding more and more like the ECU. Obviously it's not ok to jump to conclusions, but....

I think the next step is to change out the ecu back to your old one.

The reason is that a bad afm can fry an ecu in a second. Same with a bad tach. If your afm fried your ecu, then that's why I said to change them both (they are both confirmed good parts). So, you change out the ecu back to your original, leaving the known good afm in there. If it fails to start each time, then you can suspect your ecu. On the other hand, if the car starts each time, then it could be the afm. If you put the new ecu back in, then make sure that you keep the known good afm in there as well.
Good plan and much easier to do.
Old 08-19-2011, 10:14 PM
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It is the ECU.

Went out, tapped the started and it fired right up. Swapped out the ECU and no start. I think we have narrowed it down a bit.
Old 08-19-2011, 11:15 PM
  #97  
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I would have to agree. Stella Time!
Old 08-19-2011, 11:57 PM
  #98  
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Still have that non stock chip in there ? I would suggest inspecting the ecu for folder joints and put your stock chop back
Old 08-20-2011, 12:00 AM
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Originally Posted by theiceman
Still have that non stock chip in there ? I would suggest inspecting the ecu for folder joints and put your stock chop back
Clive, you been drinking again?

It seems a shame to drop the motor now that we have this figured out.....but that is the story of my life.
Old 08-20-2011, 12:09 AM
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Can't edit with an iPhone damn it
Stock chip of course and look for bad solder joints on the ecu board.
Didn't you have a russel and Hobbs chip or some such thing ?
Old 08-20-2011, 12:14 AM
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Originally Posted by theiceman
Can't edit with an iPhone damn it
Stock chip of course and look for bad solder joints on the ecu board.
Didn't you have a russel and Hobbs chip or some such thing ?
The stock chip is back in and I've gone over every inch of the boards. It's time to break out the schematic and really take a hard look at the boards, joints, and flux capacitors.
Old 08-20-2011, 12:29 AM
  #102  
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I've got the schematic somewhere, but if you ask me, it's time to take her out and drive her.
Old 08-20-2011, 01:03 AM
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Originally Posted by rusnak
I've got the schematic somewhere, but if you ask me, it's time to take her out and drive her.
I can't seem to find my Bentley this evening.
Old 08-20-2011, 01:52 AM
  #104  
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"The reason is that a bad afm can fry an ecu in a second."

As always, not true!

And the tach itself RARELY if ever damages the DME ECM.
It's the mis-wiring of the tach signals from the ECM that
damages the ECM.

Bottom line: Must have read the above over on the 'Dark Side'
as they have been really providing some mis-leading info
lately, e.g. It's always an air leak problem for any 3.2 problem,
with the exception of AM reception.

Example: Read the latest thread for intermittent no-start here:
http://forums.pelicanparts.com/porsc...e-problem.html
Poor Pelican thread starter! They get sucked right in.
Old 08-20-2011, 02:01 AM
  #105  
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Doug, it's not in Bentley. I think I have the pdf in my remote HD back at the office.

I forgot to mention that Steve Wong has diagnosed intermittant no start to broken solder joints on a small board that is perpendicular to the two large boards.


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