[urq] Re: intermittent ignition cutout, tach drops to zero

[Ed Kellock]

More info...

Just back from lunch and I believe the cutout happens more often or
exclusive on decel or similar periods of high vacuum like between
shifts.

Ed

On Mon, 14 Feb 2005 12:38:07 -0700, Ed Kellock <ekellock at gmail.com> wrote:
> In the last few days, my urq has started to cut out intermittently.
> The tach drops to zero and most of the time it comes right back on its
> own, but sometimes I have to cycle the ignition switch.  Every time I
> do have to cycle the ignition switch it comes back immediately
> afterwards.
> 
> Over the last couple days I have fixed some vacuum leaks, cleaned the
> contacts on the cap and rotor, replaced the spark plugs with some
> f5dpor (20-valve turbo) plugs, and replaced a blob of black goo that
> was originally a breather hose down on the side of the block.
> 
> The car has a little history of this type of cutting out.  It did it
> one time on the day I started home with it from SC when I first bought
> it.  Cycling the key fixed it then and it was fine the rest of the
> 1500 miles home.  Since then (Oct '02), it's done it a grand total of
> maybe 3 times.   Did the whole Park City trip without this ever
> happening.
> 
> The issues I fixed in the last few days have existed since I got the
> car.  I feel I've either disturbed something or, I've gotten things
> more buttoned down than they've been for a long time and something's
> not quite used to working right again.
> 
> That last statement may sound stupid, but after I fixed the vacuum
> leaks (metering head bolt missing, other's loose, and a small diameter
> hose was torn at the nipple it connects to), the car started up with
> very little cranking and settled into a nice idle of about 800 rpm,
> which is something it has never done.  While the car was idling, I was
> fiddling with the mixture a little and out of the blue the frequency
> valve kicked in (started buzzing constantly) and the idle went up to
> about 1100 like it used to always be.  But then the buzzing stopped
> and the idle settled back down again and this hasn't reoccurred.  Ever
> since that round of wrenching though, I've had the intermittent
> ignition cutout.
> 
> Also the main hoses to the carbon canister are not connected, but the
> very small diameter hose from the control valve to the intake manifold
> is still connected.  One of the nipples on the intake dome is broken
> off and plugged and the other is capped.  I assume that's when the
> previous owner or one of his monkey-lad minions just disconnected the
> hoses to the carbon canister.
> 
> I guess my main question right now is: is there any way that the
> fuel/vacuum functions can trigger an ignition cutout for any reason?
> That is the main area I've affected and this ignition cutout just
> seems like a breaker flipping and resetting.  I've wiggled and jiggled
> all the wires in the areas where I had my hands stuffed and haven't
> been able to intentially cause the cutout.
> 
> Ed
> Colorado Springs
>