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RE: [T3] Dead Injectors Puzzler

On 12 Jan 2001, at 12:56, Fuhriman, Mark wrote:

> Yes, maybe lots of different kinds of brain fade going on.  You're rght, I
> meant 1&4 are failing now.  It was kind of late...

That's still okay. I think you're a lot closer to a solution now and 
you've accomplished a LOT!

> The 3/4 injector wiring harness is kind of jury-rigged, and the trigger
> point harness is also a bit messy looking, although the crimped connections
> all look and test (resistance-wise) OK.  But I have a couple of spare
> harnesses from which I can cut pretty pieces, complete with the connector
> boots.  I'll splice these in.  I know, ..be careful.!

I recommend that you not do that just yet. It is probably a good 
thing to consider for the future, but right now it is important not to 
do anything that might set you back. Wait until you're back on level 

> When I'm done with that I'll look again at all those grounds and other
> wiring paths with the VOM.  If, after all this, I can rule out a
> wiring/ground problem I'll try another (third!) ECU and maybe a third set of
> trigger points.

Yes, I think I would specifically check another set or 2 of trigger 
points. When you're done, I'd like to at least see the ones that you 
had that were bad. BTW, it's a good idea to lube the trigger point 
cam with something. The Bosch cam grease is perfect for this. 
Running either dist cam dry will lead to rapid rubbing block wear.

> > This is a pretty good test. Do it again WHILE the engine is running
> > on just 2&3 (failure mode). That would show up a problem in the
> > trigger points or the trigger point wiring.
> That's what I did- tested this in failure mode.  However, I did *not* test
> this while the car was running on all 4.  And I'm not sure I need to as long
> as whatever voltage I measure here is the same for both sides.


> I guess the easiest thing to do next is measure resistance across each set
> of trigger points.  Measured both at the trigger connector pins and at the
> corresponding ECU connector wires.

I agree.

Jim Adney
Madison, WI 53711-3054

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