Ci cars are very very prone to starting issues with heat soak and residual pressure loss. If you don't have a check valve and accumulator to maintain pressure at the injectors, the fuel vaporizes. You are relying on fuel pressure to open the mechanical injector, and it takes forever to push enough liquid fuel through for it to run properly. It can be a bit of a bear to track down the leaks, as it can be back through the pump check valve, out the fuel distributor through the fuel return line, from the warm up regulator to the return line, or out the injector or cold start injector tips. A lack of accumulator only makes it worse, since you have a smaller volume of fuel to leak before the vapor problem rears its head.
Thats the bad news. Good news is that a fairly effective repair (or hack job, depending upon your opinion) is to add a pushbutton to actuate the cold start injector when you are cranking the car. On a race car, you could just replace the factory actuating wires with your own power and ground supply, but on customer pay jobs I used to leave the factory setup in place, and add a second ground wire through the pushbutton. The injector is supplied power from the starter bypass terminal on every start. It is grounded through a thermal timer, which is an electrical switch that is normally closed while cold, but opens when warmed from either engine heat , or from the current flowing through it while cranking. Piggyback a wire on the ground side, run it to a normally open pushbutton, and ground the other side of the button. Mount it on the opposite side of the steering column, so you can push it while cranking the engine. This should make it acceptible, at least.
Beware, my experience is with Volvo, so there may be subtle differences in wiring. The systems are substantially similar.