[Vwdiesel] [xjlist] Engine Questions

Wed Aug 27 09:54:34 PDT 2008

This one does not have a lift pump

Oh and for those wondering it is a 2.1l Renault Turbo Diesel, finding the
manual in english is hard as hell.

I suspect it is like most of you have said its probably air in the lines, I
guess I will just try re-bleeding the injector lines. The thing is, the
engine will run longer if I give it more fuel, perhaps I should try a lift
pump

On Tue, Aug 26, 2008 at 11:59 PM, ernest breakfield <
ernestb at backyardengineering.org> wrote:

>   hi Jim!
>
> i believe you're probably right for most diesels, but i don't think
> my old Mercedes 617.952 has a lift pump,...
>
> cheers!
> e
>
>
> Jim wrote:
> >
> > Diesels have 2 fuel pumps- the injector pump which times and meters the
> > fuel delivery, which the injector lines come out of; and the lift pump,
> > which is a high volume, low pressure pump to feed the fuel to the
> > injection pump. The lift pump is usually mechanical on older diesels,
> > but could be electric. Usually its a mechanical pump mounted to the side
> > of the block somewhere. The fuel feeds from the tank to the engine, in
> > through the lift pump, then through the fuel filter, then to the
> > injection pump.
> >
> > As for the turbo, a diesel will run just fine without the turbo,
> > especially at idle. It just won't have the power, and like Neal said,
> > will run rich. This will be seen by black smoke out the exhaust. You
> > also don't want to drive like this, because the exhaust temps can get
> > very high...you don't want to melt a piston.
> >
> > If you just assembled the engine, did you bleed the fuel system? Start
> > the engine (or aty least have someone crank it, if it won't start) and
> > loosen the first bleeder screw in line- there is usually one on top of
> > the fuel filter housing. Just crank it loose a hair and let any air come
> > out. If you just get a nice constant supply of fuel, close it up. Next
> > bleed the lines. Where the lines attach to the injectors, loosen the
> > fitting on the first injector, and let any air out until you just get
> > nice fuel. Snug it up and move on to the next injector, until you have
> > done all of them. Most injectors won't fire if they have air behind them.
> >
> > Jim
> >
> > Neal Hoover wrote:
> > >
> > > is yours a mechanical fuel pump or electrical? those thing have to be
> > > timed
> > > just right so fuel is injected precisely when it needs to be.
> > > do you have a factory service manual for that motor?
> > > that's where i'd start.
> > >
> > > Neal A. Hoover
> > > Project '76 J-10
> > > Project '96 XJ
> > > http://community.webshots.com/user/proj96xj
> > <http://community.webshots.com/user/proj96xj>
> > > <http://community.webshots.com/user/proj96xj
> > <http://community.webshots.com/user/proj96xj>>
> > >
> > > ----- Original Message -----
> > > From: "Stephen Kraus" <UB3RATL4Sf00 at gmail.com<UB3RATL4Sf00%40gmail.com>
> > <mailto:UB3RATL4Sf00%40gmail.com <UB3RATL4Sf00%2540gmail.com>>
> > > <mailto:UB3RATL4Sf00%40gmail.com <UB3RATL4Sf00%2540gmail.com>>>
> > > To: <vwdiesel at vwfans.com <vwdiesel%40vwfans.com> <mailto:
> vwdiesel%40vwfans.com <vwdiesel%2540vwfans.com>>
> > <mailto:vwdiesel%40vwfans.com <vwdiesel%2540vwfans.com>>>;
> > > <xjlist at yahoogroups.com <xjlist%40yahoogroups.com> <mailto:
> xjlist%40yahoogroups.com <xjlist%2540yahoogroups.com>>
> > <mailto:xjlist%40yahoogroups.com <xjlist%2540yahoogroups.com>>>
> > > Sent: Tuesday, August 26, 2008 4:32 PM
> > > Subject: [xjlist] Engine Questions
> > >
> > > > I have nearly completed the 2.1l Turbo Diesel I am putting in the
> > > Jeep, I
> > > > have a couple questions:
> > > >
> > > > Should the lack of the turbo keep the engine from running
> > constantly? I
> > > can
> > > > get the engine started and it fires up but it acts like its choking,
> > > slows
> > > > down, and then stops firing. The longest I've gotten the engine to
> > hold
> > > for
> > > > is about 30 seconds to a minute, that is without the turbo. I don't
> > > have a
> > > > reliable hose made to port the turbo air to the air intake yet.
> > > >
> > > > Mike Strawbridge been a big help in both the headgasket job and
> > > torqueing
> > > > down the head (and letting me make a horrible mess of his garage)
> > > >
> > > > I'm posting this to both the VW diesel list and the Jeep list
> > > because I'm
> > > > hoping with all the answers I get I should be able to piece together
> > > what
> > > I
> > > > need to do. I just want to remove that damned 2.8l V6
> > > >
> > > > --
> > > > ______________________________
> > > > Stephen Kraus
> > > > UB3RATL4Sf00 at gmail.com <UB3RATL4Sf00%40gmail.com> <mailto:
> UB3RATL4Sf00%40gmail.com <UB3RATL4Sf00%2540gmail.com>>
> > <mailto:UB3RATL4Sf00%40gmail.com <UB3RATL4Sf00%2540gmail.com>>;
> > > >
> > >
> > >
> >
> >
>
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-- 
______________________________
Stephen Kraus
UB3RATL4Sf00 at gmail.com;