Check to be sure that the electrical and vacuum hose connections at the warm up regulator are correct and working. DMC Joe / DeLorean Services / <dmcjoe@xxxx> Web Site: <http://www.deloreanservices.com> ---------- From: Graham Wells <gwells@xxxx> Apart from one occasion when there was a real reluctance to start when cold, starting has mostly been OK. However, until the engine has run for 2 or 3 minutes, there is a misfire problem on any load or acceleration which seems to me, as a novice to fuel injection, to be similar to over use of the choke on a carburettor based engine. I feel sure it is an excess of fuel causing the problem, but it does appear to go away after a few minutes. I have checked the cold start injector which does not appear to be leaking excess fuel into the system. Does anyone have any other ideas? Graham gwells@xxxx VIN 17152