[Vwdiesel] was starting and now a bomb
biovolks at yahoo.com
Fri Mar 10 16:46:04 EST 2006
Actually ,I should have been more clear, that idea was something I thought up while typing the first part of the message.
I wasn't planning on hooking up a guage, just using my hand over the pipe then intake, and giving a relative comparasin ,because I figured , it would have to be a obvious drop in pressuse/suction (pre and post starting) to make it that difficult to start.
I counted the time for it to start and it's anywhere from 5 to 15 seconds to start it.
I have replaced all the lines from and to the fuel pump and filter (it has the return line running through it for fuel warming (85 engine/tranny and 91 everything else)), so there's still a possibility of a air leak on the supply from the tank ). I'd put a clear section on a small part of the lines, but I'm told that diesel hates the wrong type of rubber and polypropelene.
Thank you all for the suggestions, and help, I will have a busy weekend ahead of me
The President <quantum-man at hotmail.co.uk> wrote:
Paul unless you block off the exhaust you will see no gain/ difference in
pressure between a good cylinder and a duffer. Blocking exhaust would mean
pressurising on the exhaust stroke creating a 1600 cc footpump... This I'm
sure could increase over many strokes but utimately it would need to rise
to 200psi for a bad ring and 400psi or more for a perfect cylinder.
Wouldn't like to be standing next to you when the exhaust gave up holding
that quantity of air at that pressure...
It'll be like those guys who shoot cars into the air with an air cannon.
Do as I suggested before and check for 'priming' fuel starvation. ...Even a
bad injector would let you start the car and then run lumpy/smokey. But to
have 4 'fail' I dunno...But you say it runswell when it starts didn't you?
>From: paul lew
>To: vwdiesel at vwfans.com
>Subject: [Vwdiesel] starting problem testing injectors
>Date: Thu, 9 Mar 2006 12:59:29 -0800 (PST)
> Me again
> Does anyone have a way of testing/inspecting the injectors without the
>pressure machine mentioned in the book, or taking them somewhere, as this
>is my only transportation ,so when the're pulled, i'm not drivin.
> There's one thing I'm thinking about trying...
> If the cylinder compression is low when cranking ,then the exhaust
>threoretically should be too, so I'm going to check what kind of pressure
>comes out when cold trouble starting ,then when it's running and hot,
>disconnect the fuel pump solenoid lead and compare pressure.
> I'll also compare the air intake this way.
> Hopefully it will tell me something about overall compression.
> exercise in futility??? thoughts???
> British Columbia
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