[DML] Re: Cold starting and horrifically rough idle

["Harold" <hmcelraft@xxxxxxx>]

May be something to do with the warm up regulator. There are some vacuum lines there with a "delay" valve - part of the Acceleration Enrichment Circuit. See the vacuum hose label for routing. As you stand at the back of the car facing the engine - be sure the black part of the delay valve ("carb") is facing you. If not it is backwards. This circuit is functional until the engine warms up. If the valve is backwards it will not enrich properly and the engine may act as you describe.

Harold McElraft - 3354

--- In dmcnews@xxxxxxxxxxxxxxx, JP Hindin <jplist2008@...> wrote:
>
> 
> Greetings;
> 
> I went to have a look at the coldstart valve and see if I could work out
> where the thermotime switch was and noticed that the retaining clip on the
> connector to the CSV wasn't on right, impinging on the connection. I
> corrected the clip and plugged the cable in properly and the car starts
> noticeably easier than it has before, however it idles REALLY rough for
> the first 30s or so, and then becomes very smooth.
> 
> On start, the engine pulses wildly, and it must be missing badly because
> the whole car shudders. If I let my foot off the pedal it will immediately
> stall out. If I pump the pedal, it'll idle, but badly, with more shaking
> and coughing, until it smooths out. If I hold my foot down, the engine
> will work its way through the spluttering and rev high, and above about
> 1500rpm it sounds smooth, but once you let it back to idle, it goes back
> to shaking like mad... until it warms up.
> 
> The mechanic who worked on it said he'd replaced the fuel filter... but he
> also said he'd flushed the tank, which I've proven he didn't, so I'm going
> to replace the filter and see if that helps. But I was wondering if this
> is a "known" issue as well.
> 
> Thank you all, have a wonderful Friday & better weekends;
> 
>  - JP
>




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