[urq] No hot start (speed or reference sensor?)

[n-engelbert at terrans.net]

> In the good old days, it was :"It's always ignition".
>
> Testing for spark is very easy, you only need an old spark plug that you
> connect to cylinder #1 wire, with the plug body conveniently resting in
> the
> hole of that big bracket at the front of the engine. Isn't that bracket
> made specifically for that ? :-P

Got extra spark plugs, will try that.

>
> No kidding, my limited comprehension of ignition let me believe that if
> there is spark, the system works. So rule that out before looking for fuel
> problems.
>
> If indeed there is no spark, there is at least three areas to look for,
> before replacing components at random:
>
> 1- the ignition control module (ICU) is grounded at the top of the intake
> manifold near the cold start valve. Flaky wire = no spark. Ask me how I
> know...

Can check that, it was tight last time I checked.  I'll clean it up.

> 2- The coil and many other engine components (maybe the timing sensors
> ???)
> are grounded on the coil bracket. When I was poking there to clean these
> ground wires, the stud where they are bolted just sheared with a very
> small
> effort. Give it a look.

Will do, and will clean.

> 3- The ICU is in the top of the glovebox: verify if there is dielectric
> grease between the ICU and its heat sink: there is a reason this stuff is
> there.

It's there.  If the ICU failed though, it wouldn't spark at all, right? 
Not fail during cranking, then mysteriously work when the engine finally
did start?

>
> Good luck and HTH,
>
> Louis-Alain