Thanks Dave,I will check the fpr vacuum source and the plastic line with a vacuum gauge to see if enough vacuum is getting to the fpr,the fpr is only 3 months old and is a bosch unit from IPS.The fitting to check actual fuel pressure at the fuel rail is frozen together so I can't check fuel pressure at the fuel rail but I can check pressure down at the fuel filter outlet if needed although that won't be as accurate.This b234 has been a good engine and I wan't to get the smoother Idle it once had,perhaps a leak-down test will be needed to check the condition of the valves.Another thought was the Idle air valve,is it possible that it is allowing too much air at idle throwing off the the idle mixture or will the the system compensate for additional air?I will press on with testing and report back.
Thanks again