running rough and rich

I have just finished converting my 89 back to fuel injetion.The car starts fine but it runs like it has a big cam and very rich.It does this for about three to four minutes and then smoths out and not running rich at least not compared to what is was.The car does this every time i start it,it does not matter if its cold or hot.I am running an explorer intake, stock injetors,a gms 75mm mass air meter and kirben adjustable regulater set at 40psi.I have installed a new atc sensor and my egr valve is not plugged in to wire harness or vacum.I also have a 255 fuel pump.Any help with this would be greatly appreciated.

tvmango said:

stupid ? for ya, the maf is calibrated for your injectors?? right? where is it mounted? Are your injectors old? one may be leaking... just a few suggestions

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the maf is calibrated for the 19lb injedtors and in the stock location.The injectors are not new but pulled them from a nother 89 i drove home to part out.I have tried two sets with the same results.

banditmwp said:

have you tried fooling with the fuel pressure regulator at all?

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I have tried adjusting the regulater with no luck.When i turn it down past 38lbs the car hesitates.