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Subject:Re: Update on stalling '87
From:David Kao
Date:Thu, 5 Jul 2007 09:31:14 -0700

--- TC <trclark@SHAW.CA> wrote:

> > I have rebuilt ECUs in stock if you find you need one.  They are $250 plus
> $100 core charge.  They are superior to the other ones out on the market
> (Fuel Injection Corporation rebuilds).  I tried these at one point and had a
> 50% mortality rate (in other words 50% of them were defective right out of
> the box!).
> Do you also have a similar experience with FIC rebuils on the 1.9 afm's ???
> What about the brand new FIC fuel pumps any ffed bacl on those ??
>

In my opinion the problem isn't likely to be a defective ECU. AFM is likely.
But I have a different observation.

The 87 starts and spins fast when it is cold. This already tells a lot about
it. First the ignition is fine. All wires that sometimes will break all your
bones loose are connected and the plugs are spitting fire. 2ndly the fuel line
is too connected up front to the tank with proper effort from the pump.

The temp sensors appear to be doing their job by telling the ECU to feed more
fuel when they feel cold. And the engine does spin and spin faster. The only
trouble is when it does warm up it coughs. That tells me that the air/fuel mixture
is not right for warm idle.

Check for air leak in the intake system, especially between the AFM and the actual
intake manifold. My 83 and 84 will idle even with the AFM cable unplugged.
This is a very nice Vanagon feature allowing me to point fingers at other parts
of the engine. Be aware that very often 10 fingers are not enough. Use your toes.

David

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