torquefoot
Veteran Member
Hey guys,
I have a thread on vediesel.net but thought I'd chime in here.
1984 mk1 Jetta with newer motor, I believe its code MF from an '89.
Basically after changing some seals on a leaky IP (shaft seal, main seal, cold start seal, pressure valve o-rings) my pump will not draw fuel but runs when gravity fed.
Everything has been timed properly and checked twice and basically the motor runs fine when fed through a funnel but does not produce any vacuum to draw fuel. It wont even pull fuel from a bottle right next to it. Similarly, it does not push anything out through the return side.
Notes: Return bolt orifice is clear, no visible leaks on the pump, I can pull fuel easily from the IP return with a MityVac when hooked up to the bottle or the main tank with fuel filter connected, etc.
I'm waiting for some Diesel Purge now so I can soak the pump - the latest suggestion is that one of the 'vanes' might be stuck and a good soak for a few days might clear it.
If this doesnt work I have no choice but to open up the IP (which I've never done) or replace it (which I cant afford). For what its worth I have all the tools and am pretty hands on mechanically (have rebuilt carbs and a few motorcycle engines before).
Any insights are appreciated.
Bless your souls.
I have a thread on vediesel.net but thought I'd chime in here.
1984 mk1 Jetta with newer motor, I believe its code MF from an '89.
Basically after changing some seals on a leaky IP (shaft seal, main seal, cold start seal, pressure valve o-rings) my pump will not draw fuel but runs when gravity fed.
Everything has been timed properly and checked twice and basically the motor runs fine when fed through a funnel but does not produce any vacuum to draw fuel. It wont even pull fuel from a bottle right next to it. Similarly, it does not push anything out through the return side.
Notes: Return bolt orifice is clear, no visible leaks on the pump, I can pull fuel easily from the IP return with a MityVac when hooked up to the bottle or the main tank with fuel filter connected, etc.
I'm waiting for some Diesel Purge now so I can soak the pump - the latest suggestion is that one of the 'vanes' might be stuck and a good soak for a few days might clear it.
If this doesnt work I have no choice but to open up the IP (which I've never done) or replace it (which I cant afford). For what its worth I have all the tools and am pretty hands on mechanically (have rebuilt carbs and a few motorcycle engines before).
Any insights are appreciated.
Bless your souls.