78 VW Rabbit Diesel TIming Belt/Injector Timing Question

Definitely don't do that. The way the pump is designed . The cam wear
doesn't affect anything its always .83. Your measuring lift. if the cam is
worn the .83 will be in a different spot , but the fuel timing and duration
will be the same. If you advance it out of limits higher it wont start in
the winter. if you lower it , your car will smoke.
"Corrado Daddy" > wrote in message
ups.com...
>
>> I do have a question. The Bentley manual says to adjust the dial to
>> .83 mm. Since the injector pump is worn, could I increase this
>> measurement to compensate for wear, and advance the timing a bit?
>
> No! A worn pump will only generate less pressure, the timing is
> affected by the adjustment you make with the dial indicator. Setting
> this value compensates for any wear in the mechanism. A worn shaft
> bushing on the pump will cause it to suck air past this bushing instead
> of fuel from the tank causing a great loss of power. Make sure all
> your fuel line connections from the filter to the pump are snug and not
> allowing air to get in. That too will cause a loss of power.
> TEMiller
>

Also , the instrument is sensitive , sometimes when you tighten the fuel
pump down the needle moves. Its because the bolts are too loose. you want it
at .83 when your all tight.
"Corrado Daddy" > wrote in message
ups.com...
>
>> I do have a question. The Bentley manual says to adjust the dial to
>> .83 mm. Since the injector pump is worn, could I increase this
>> measurement to compensate for wear, and advance the timing a bit?
>
> No! A worn pump will only generate less pressure, the timing is
> affected by the adjustment you make with the dial indicator. Setting
> this value compensates for any wear in the mechanism. A worn shaft
> bushing on the pump will cause it to suck air past this bushing instead
> of fuel from the tank causing a great loss of power. Make sure all
> your fuel line connections from the filter to the pump are snug and not
> allowing air to get in. That too will cause a loss of power.
> TEMiller
>

I have a question regarding setting the fuel injection pump timing:

I have followed the steps in the Bentley manual. Using the dial, I
have found that the injection timing is set to 1.32mm. I have loosened
the three allen head bolts on the injector pump plate. I cannot not
remove the bolt w/ the yellow paint and the standard type screw head,
it's stuck.

Do I need to loosen the screw with the yellow paint? Have I loosened
the correct screws? Now, how do I adjust the pump down to .83mm?

Thank you!

Jeff

none2u wrote:
> Also , the instrument is sensitive , sometimes when you tighten the fuel
> pump down the needle moves. Its because the bolts are too loose. you want it
> at .83 when your all tight.
> "Corrado Daddy" > wrote in message
> ups.com...
> >
> >> I do have a question. The Bentley manual says to adjust the dial to
> >> .83 mm. Since the injector pump is worn, could I increase this
> >> measurement to compensate for wear, and advance the timing a bit?
> >
> > No! A worn pump will only generate less pressure, the timing is
> > affected by the adjustment you make with the dial indicator. Setting
> > this value compensates for any wear in the mechanism. A worn shaft
> > bushing on the pump will cause it to suck air past this bushing instead
> > of fuel from the tank causing a great loss of power. Make sure all
> > your fuel line connections from the filter to the pump are snug and not
> > allowing air to get in. That too will cause a loss of power.
> > TEMiller
> >

I posted at your other post. Loosen the fuel pump mounting bolts. don't move
the painted one, you removed the wrong bolts.
"JH" > wrote in message
ps.com...
>I have a question regarding setting the fuel injection pump timing:
>
> I have followed the steps in the Bentley manual. Using the dial, I
> have found that the injection timing is set to 1.32mm. I have loosened
> the three allen head bolts on the injector pump plate. I cannot not
> remove the bolt w/ the yellow paint and the standard type screw head,
> it's stuck.
>
> Do I need to loosen the screw with the yellow paint? Have I loosened
> the correct screws? Now, how do I adjust the pump down to .83mm?
>
> Thank you!
>
> Jeff
>
> none2u wrote:
>> Also , the instrument is sensitive , sometimes when you tighten the fuel
>> pump down the needle moves. Its because the bolts are too loose. you want
>> it
>> at .83 when your all tight.
>> "Corrado Daddy" > wrote in message
>> ups.com...
>> >
>> >> I do have a question. The Bentley manual says to adjust the dial to
>> >> .83 mm. Since the injector pump is worn, could I increase this
>> >> measurement to compensate for wear, and advance the timing a bit?
>> >
>> > No! A worn pump will only generate less pressure, the timing is
>> > affected by the adjustment you make with the dial indicator. Setting
>> > this value compensates for any wear in the mechanism. A worn shaft
>> > bushing on the pump will cause it to suck air past this bushing instead
>> > of fuel from the tank causing a great loss of power. Make sure all
>> > your fuel line connections from the filter to the pump are snug and not
>> > allowing air to get in. That too will cause a loss of power.
>> > TEMiller
>> >
>