[Vwdiesel] Strange IP Problem

[James Hansen]

Oh.  just thinking along the lines of a bad ground to the engine.
A lot of times, when you do something mechanical like push a clutch 
pedal and suddenly the thing behaves itself, your ground path has 
changed for the better, suddenly all is well, the bucking farting beast 
from hell purrs like a kitten and you tear your hair out trying to find it.

Probably not in this case however...

stillthinking.
-James



Val Christian wrote:
> Starts OK, charges OK, runs AC OK (inplying good alt output).  Why
> do you ask about grounding?
> 
> When it goes in idle mode, it runs smoothly, and never stalls.
> 
> Val
> 
>> Hmm.
>> motor is well grounded?
>> -James
>>
>> Val Christian wrote:
>>>> In a message dated 8/22/2006 9:03:33 PM Pacific Daylight Time, 
>>>> val at mongobird.com writes:
>>>>
>>>>> It's happened a couple of times, usually shifting from 1st to 2nd.
>>>>> Shift into 2 (or 4th), and power drops to idle.  Foot pedal is not
>>>>> responsive with car in gear, and car slows down.  Push in clutch,
>>>>> and rapidly operate the foot pedal, and things get better right 
>>>>> away.
>>>>>
>>>>> The idle power is smooth, with no roughness.
>>>>>
>>>>> IP crowd, any ideas?
>>>>>
>>>>> Val
>>>>>
>>>>   Sounds like air in the fuel line.  Is there a kink or crack 
>>>> in the IP supply line that will allow air in when the engine 
>>>> rocks one way or the other?
>>>>   If it's a top-of-the-tank pickup setup (instead of a fitting on 
>>>> the bottom) maybe there's a leak in the tube going down, 
>>>> letting air in as the fuel sloshes between shifts?
>>>>      Loren
>>> A fuel flow appears to be great everytime I can check it.  There are no bubbles
>>> of any consequence in the IP feed line.  There are no signs of marginalized
>>> fuel flow, as the car is frequently driven at 80 MPH, with AC, which 
>>> pretty much assures that the power is at about 65% or higher.
>>>
>>> The problem seems to mostly happen between first and second gear, and
>>> on level ground.  Repeating the shift sequence going up or down hill
>>> doesn't seem to increase the failure rate.  It happened once on a 3 to 
>>> 4 shift.
>>>
>>> Releasing the clutch, and reving the engine once, clears the problem.
>>> When it gets into this modality, it idles smoothly.  In every other respect
>>> the engine appears to work OK, and developes power and RPM OK.  
>>>
>>> A starved IP was a suspicion, but has not been supported by any observation.
>>>
>>> Val
>>>
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