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Re: [T3] Fuel Injectors always on


On 29 Sep 2003 at 7:52, Todd Heimer wrote:

> My '68 squareback engine quit while driving and will
> not restart.
> Initial diagnosis revealed ignition OK, fuel injectors
> pumping fuel, but it looks like way too much, and
> engine becomes flooded.
> 
> I measured the signal going to one of the injectors
> with an oscilloscope while cranking the engine, and
> found a constant 12V, not a tens of milliseconds
> pulse.
> The fuel flow from the injector also appears constant,
> not pulsing.

It sounds like you've done your homework, and I've never seen this happen. 
There is ONE situation that I've seen mention this, but that is with a 
particular (mis-) setting of the Bosch FI tester box switches.  

While brain box failures ARE rare, they are bound to get more frequent as these 
cars get older. I have spare B brains, which are the ones you want, and I would 
be willing to sell you one to swap in. If it doesn't help you could return it 
and I would refund your money, less the postage.  

If you could find a FI tester to check out the rest of the components and 
wiring first, that would be ideal, because there just might be a chaffed wire 
that is causing this problem (although I don't know of any kind of short that 
should do this.).  

You're in Maryland. If there's someone closer to you that would be even more 
convenient than getting one from me.  

-- 
*******************************
Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
*******************************

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