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Intermittent Start/Stall problem

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  #1  
Old 08-27-2011, 07:18 PM
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Default Intermittent Start/Stall problem

Before anyone brings it up, I did search extensively, but didnt find anything matching my exact problem.

2003 A4 1.8t Quattro 5spd

I just bought the car and didnt even have the problem happen to me until my wife mentioned it.
Intermittently immediately after starting, the car stalls. Its a manual trans and I have the car in neutral with the clutch pushed in. Once I start it again its fine. Like I said, it completely starts, and runs at about 1000rpm and then it immediately drop to 0. Its not like its just not starting at all. The engine is definitely running for a second or two.
 
  #2  
Old 08-29-2011, 03:49 PM
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anyone?
 
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Old 08-30-2011, 04:19 PM
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i also have this intermitten problem... same scenario manual trans in neutral starts fine after stall with the rpms just dropping from 1 grand to 0. if you find anything out let me know. i myself have been looking into this problem also.
 
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Old 08-31-2011, 07:48 AM
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well I really have no experience with German cars, but if I was diagnosing a GM the first thing Id suspect is the fuel pump. I plan on doing some power upgrades soon, so maybe I'll just replace the fuel filter and upgrade to a walbro 255 and see what happens.
 
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Old 08-31-2011, 12:13 PM
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sounds like the engine speed sensor. check the codes.
 
  #6  
Old 09-01-2011, 12:04 PM
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Is that the same as a crank position sensor?

There are no codes...
 
  #7  
Old 09-02-2011, 01:39 PM
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has the fuel filter been done?
 
  #8  
Old 09-02-2011, 07:57 PM
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No. That's the first thing I thought of though. Try to get a new one this week.
 
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Old 09-03-2011, 11:00 AM
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I would start with that. Check the pressure at the fuel rail by depressing the schraeder valve on the firewall end with the ignition switched on. There should be a pretty good spray. If there isn't much pressure it's either a bad filter or the fuel pump. There are write ups on the filter and the pump either at audidiy.com or possibly on audizine.
 
  #10  
Old 09-04-2011, 10:18 AM
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good call shane, but I think Id rather hook up my fuel pressure gauge than just let it spray everywhere, lol.
 


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