Re: Failure means progress, right? XN6 no-start diagnosis help needed
From: Lance Duchesneau (ducaati@gmail.com)
Date: Mon 26 May 2008 - 22:21:56 EDT
Martin
A coil should be shorted from one sideo f the primary to the other, and open
between primary and secondary. Is there continuity between the coil primary
and the triggering device in the distributor?
Sometimes when I troubleshoot, I start in the middle and establish whether
the problem is up stream or downstream first.
Lance
On Mon, May 26, 2008 at 7:34 PM, zumkopf <martin.karo@verizon.net> wrote:
> My new (to me) '84 505 XN6, when I first got it last winter, behaved
> oddly in that it would run for about 20 minutes, then stop on its
> own, and would often not restart. It did not matter if it were being
> driven, or idling still: it would suddenly stop. Shortly, I couldn't
> get it to start at all. As it was winter and I have no garage, I
> left it alone. Fast forward to spring. On a lark, I tried to start
> it; after a few seconds of cranking, it caught and ran for about ten
> seconds. Then it died again, and would not restart.
>
> Battery is fine. Cranks strong. Fuel pump is running (buzzes fairly
> loudly). I tried loosening the connection at the fuel distributor to
> check for fuel flow, and fuel sprayed freely. So I'm guessing it's
> not fuel. I then checked for spark, as suggested by Haynes (is this
> the right way to do it?): I pulled a plug lead, placed it near a
> ground (intake manifold) and had my son crank the motor; no spark. I
> did the same with the main lead from the coil; again no spark.
>
> What next? What's the method for checking the coil? Haynes is
> pretty obscure on the topic. Would a bad coil explain the previous
> problem, running for a while and then dying? How does one check the
> ECU? What else could it be? Was my spark check method incorrect,
> and could it still be fuel?
>
> I appreciate any advice on this. I'd love to get the car running,
> what with diesel at $4.50 a gallon.
>
> Marty
> '85 505 STI TD Auto
> '84 505 STI XN6 5 speed (motionless)
>
>
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-- Lance[Non-text portions of this message have been removed]
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