SOLVED , fingers crossed!!
So I installed the new Fuel Pressure regulator ( Delphi model FP10302) sourced from FCPEro ( $96) , yikes!! and I am pleased to say that, so far, the stuttering / hesitation issue appears to be solved. After the install of the FPR , the car started promptly after the usual several primes ( installing the fuel pump is next to resolve the fuel flow back due to a bad built in check valve in the only intank fuel pump ( regina ). After the car warmed up I did several hard acceleration events while in park and engine rev up was normal. Thanks everyone who chimed in to possible causes.Much appreciated.
Fuel pump is next and will report back in the thread I created about the no start on the first attempt.
Cheers
Paul
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