Re: [DMCForum] Stuck in the doldrums....
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Re: [DMCForum] Stuck in the doldrums....



Travis,

> The initial acceleration in first is slack, but beyond about 2000 RPM it
> seems fine. At tope highway speed it feels like I'm getting a miss
somehow
> (feels a little herky-jerky).

It is possible that you got some particulates in the system while you had
the fuel lines open.  Try to determine if the symptoms are temperature
related -- if it is worse with a cold engine or is present all the time.
Temperature related problems are usually caused by the control pressure
regulator.  If you are a serious DIY'er, invest in a fuel pressure gauge.
This will go a long way toward helping you diagnose fuel system problems.
Also pick up a copy of "Bosch Fuel Injection Systems" by Forbes Aird, ISBN
1-55788-365-3.  Chapters 6 & 7 are all about Continuous Injection like
what
is used on the DeLorean.

I suggest the following test:

Unseat all the fuel injectors and aim them into a test fixture.  If you
don't want to spend the money on one, you can get by using 6 graduated
cylinders or even small jars if you are really cheap.

With the ignition off, jumper pins 87 & 30 in the RPM relay connector so
that the fuel pump runs continuously.  (See section D:02:02 in the
DeLorean
Workshop Manual.)  No fuel should leak from the injectors with the air
meter
plate at rest.

Pushing on the air meter plate will cause the injectors to spray.  The
spray
patterns should be cone-shaped.  Slight asymmetry is okay as long as the
fuel volume from each is within 10% of the others.  Drips or streams are
not
acceptable.

Let us know what you find.

Walt


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