[urq] ** SOS - Stranded!! ** Ignition Problem?

[Ingo Rautenberg]

Eric,

Could be, but I'd look at the more obvious -- vacuum leak or tear in the
intake/boost hoses.  If the tear gets big enough, it'll mess up your fueling
enough to give you those same symptoms.  I take it you checked the wiring
connections at the fuel pump and have it relayed?

HTH

On Thu, Jul 2, 2009 at 11:34 PM, <racingiron at comcast.net> wrote:

>
> So, I'm on my way to Mid-Ohio, enjoying the cooler weather and the urq...
> The problem started as a very occasional and brief cut of power while under
> partial boost (5-10 psi). It was just like a quick hiccup, then everything
> was fine again. Then it progressively got more frequent and pronounced. It
> would idle OK and seemed to smooth out under full boost, but part throttle
> on or off boost was bucking wildly. For a time I could downshift to 4th and
> run about 4200 rpm with fewer troubles, but even that eventually got bad. It
> got to the point that full boost wouldn't even work right, and idle would
> sometimes be bad, even stalled a few times.
>
> Here's all the stuff that didn't fix it:
> - Parked for about an hour while I had dinner--problem returned almost
> immediately after restart.
> - Pulled cap, it and rotor look fine, as do wires. Haven't checked the
> plugs yet.
> - Unplugged O2, still bucked but there seemed to be more unburnt fuel, lots
> of backfire pops accompanied by smoke.
> - It hasn't had any starting issues all day.
> It got so bad that it was undrivable on the interstate. I parked it and
> have continued on (luckily, the fair Elizabeth was following in her Mini).
>
> So, it doesn't seem isolated to a cylinder, so I'm thinking the coil's
> dying, or maybe the ignition module? Am I overlooking anything? Any BTDT or
> advice for me?
>
> What are my chances of scoring a coil on a holiday weekend? Is this coil
> shared with other I5s or is it special to the urq?
>
> I'm headed for the hotel right now and will return tomorrow morning to see
> what can be done.
>
> Thanks in advance,
> Eric R.
> '86 urq
> '92 urS
> '93 urS
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