Just because the car starts OK when cold does NOT mean the cold start system is working properly. The real test of it would be when it is cold, ie, below 30 degrees F. Other systems also operate when cold so it could be a combination. For instance you could have a problem with the Control Pressure Regulator or the wiring to it or the vacuum. The bypass relay for the ballast resistor may not be working. The vacuum advance system has a temperature sensitve valve to control vacuum for the advance. MY point is that if you have a problem with the car warming up there is no way to know which system is not operating properly without troubleshooting each system individually. I can tell you what commonly fails but it is just shooting from the hip without testing things to KNOW what is going on. BTW just because you replaced a part does not mean you can rule it out as a cause of a problem. It could be bad, you could have installed it incorrectly, or possibly damaged it during installation. When diagnosing a problem you have to go where logic leads you. Keep a can of Ether handy the next time you can't start the car. If it gets you going you can assume it is a fuel related problem. If it does not then you can safely guess it is ignition related. At least it narrows the diagnosis down a lot. Ether is a strange substance. It puts people to sleep yet it gets motors going????? David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, doctorDHD@... wrote: > > > > Dave, did you read my post. Hot start is an accumulator / pressure problem > not a RPM relay problem. > John > > John - somehow I thought that if the Hot Start is a pressure problem, it > could be overcome by running the fuel pump longer before starting. > > Dave T - My car starts well when cold ie overnight, every time, would this > mean the cold start system is working OK? > > Dick - I replaced the impulse coil as part of the process of fixing my > ignition twitch. > > I'll have to do some more diagnostic work-up if it happens again... > > Thanks for the tips > > Dave Delman > D² & 6530 + 2700 ohms > > > > > > > ************************************** See what's free at http://www.aol.com. > > > [Non-text portions of this message have been removed] > To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: mailto:dmcnews-digest@xxxxxxxxxxxxxxx mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/