Toyota Repair: previa starting issue, compression check, leak check

Question
Hi, Ted.  I wrote to you before about a problem with my Toyota Previa.  Problem:  Enginer turns over 10-15 times before starting.  Also very slight unstable idle barely noticeable sometimes and sometimes a little worse.  Other than that runs pretty good  I have check just about everything and it seems to check good.  Last time you recommended a compression check and cylinder leak check.  I took it to Toyota and they checked that and all was good.  I would like to focus in on fuel system and specifially fuel injectors  Do not really have good way to check fuel pressure but I think it is good and will assume so.  What checks of the injectors in what order would you recommend.  Thanks for any help, henry

Answer
I would be concerned with the cold start system, this engine uses a cold start injector located on the intake chamber, this injector is controlled by the computer which receives a signal from the cold start injector time switch, the problem may be that the cold start injector is not functioning or the injector time switch is bad, in most cases the injector time switch is the problem.