adrianholmes Posted February 13, 2012 Report Share Posted February 13, 2012 my 1970 CP is reluctant to start from cold usually needing 3 or 4 turns minimum to get going with the usual build up to all 6 firing, i have recently fitted Lumenition ignition & new leads, & once started she runs well , cold start was poor before the conversion. I have checked the new plugs & strangely 1,2 &3 are white suggesting weak mixture, 4 & 5 are sooty black & 6 is perfect light brown . Any ideas ? Quote Link to post Share on other sites
PJM Posted February 13, 2012 Report Share Posted February 13, 2012 I leave the fuel pump running for a while to "recharge" the fuel lines. Basically I wait until the voltmeter stops moving then give it a go, it can take a few turns when its been left standing for a while. Quote Link to post Share on other sites
Rien Posted February 13, 2012 Report Share Posted February 13, 2012 Hi, do you have checked the compression end pressure? all cylinders must almost equal have a 12 bar HOT! I think you have a valve seat problem. Rien Quote Link to post Share on other sites
Steve in Dublin Posted February 13, 2012 Report Share Posted February 13, 2012 Check the choke is correctly set in the first place. Both at the MU and at the throttle. Do not use too much choke and get rid of it as soon the car will run without it. As PJM said give it sometime, say 30 seconds, to 'recharge' the fuel lines and then as a good friend of mine tipped me keep the accelerator peddle about 1/3rd down when cranking it. As I said in another post recently, might need a good blow\clean out too. Go on a run and keep the revs +3000 and constant. They need to be driven. Quote Link to post Share on other sites
adrianholmes Posted February 16, 2012 Author Report Share Posted February 16, 2012 Thanks for the replies i will let you know how i get on. Adrian Quote Link to post Share on other sites
thirdangle Posted February 22, 2012 Report Share Posted February 22, 2012 Worth checking that the end of the choke cable by the MU has not slipped out of it's retaining 'P' clip Quote Link to post Share on other sites
badshead Posted February 22, 2012 Report Share Posted February 22, 2012 (edited) Adrian If you literally mean "3 or 4 turns" from cold, I wouldn't worry about it, not unusual in my experience. Sound advice above - allowing the pump 20/30 seconds or so to prime the system before crankling does help considerably. Mine needs 100% choke, a tickle of the throttle and then the choke 80% off immediately after starting and fully off a minute or so later. Edited February 22, 2012 by badshead Quote Link to post Share on other sites
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