[urq] RE : Cold start valve ?

[Ado Sigal]

Nice one Alain. I was also thinking to do a permanent conversion with 
press switch somewhere easy reachable on the left side.  That way one 
would be able to control the amount of injected fuel when starting cold 
or hot. Think that TTS as per chart has to long duration, and all it 
needs is a touch of the button, as you've found with your conversion.

Cheers,

Ado



Louis-Alain Richard wrote:

>Ado and Martin, 
>
>Did a few tests today:
>
>Thermo time switch: Good, continuity (at -15C),
>Spark plugs: OK, sparks when cranking,
>Battery: marginal, a new German-made MOLL was purchased this morning,
>Cold Start Valve: 12V while cranking? NO ! 
>
>Bingo, I have my culprit. As Martin Pajak told me, the red/brown wire
>at the starter usually break internally, and then no 12+ at the CSV.
>
>Now, maybe I'm getting old, but working outside by -15C is not my
>desired week-end task anymore... This will wait for next week, in a
>friend's heated garage. 
>
>So, because I needed to start the car to move it, I created an
>"alternative" harness. I picked a correct female connector for the CSV
>(from Eric's Coupe that is now in boxes in my basement...), and I
>hooked it to ground and to the easiest 12+ driver switched source
>under the hood, the washer pump connector!
>
>Now I can start the car easily, just by grabbing the wiper lever which
>now makes the CSV fire ! Amazing how a little squirt of fuel is all it
>needs to start. Pulling the lever with the engine hot produce lots of
>stumble, as one would expect. I think I will try it at WOT too, just
>to see if this makes more power... :-)
>
>Thanks again friends, this one was easy to diagnose because of your
>input. 
>
>Louis-Alain
>
>
>
>-----Message d'origine-----
>Hi Alain
>
>Good to hear about the new job. The CSI is connected (earth switched 
>12V) to the thermo time switch (on the back of the head), and
>energized only with the key on "start" position (on GV, WR), so the
>test is easy with a bulb or LED or V meter connected to the CSI plug.
>The test device should show the duration of the spray, as per CIS
>chart (think 3-15 sec depending on engine temp). The TTS operation,
>continuity, or contact corrosion is usually the case, so only if those
>tests prove OK, check the CSI operation, which rarely fails. 
>
>Ado
>
>
>Louis-Alain Richard wrote:
>
>  
>
>>So, last night and this morning, at -20C, my beloved urQ refused to
>>fire, for the first time in years. I suspect the cold start valve, 
>>since I didn't smell any gas, and it finally catched after a long 
>>cranking period, with the help of another battery. Otherwise, car
>>    
>>
>runs fine, and pull strongly thanks to cold air (yeah!).
>  
>
>>So question: what is the firing sequence, or circuitry for the CSV ?
>>Which sensor provides the signal ? Is the ECU involved ? How to test
>>    
>>
>it easily ?
>  
>
>>Thanks in advance,
>>
>>Louis-Alain
>>    
>>
>   
>