Dear
olopezm
Thanks for nice pictures. I located the vacume check valve, checked vacume reservoir and all the pipes. Vacume check valve seemed to be defective and so replaced. As a further savegaurd I positioned the valve vertically instead horrizontally.
I will mention that in hot days after drive of 150 miles sometimes my windstar 2000 is not accelerate or does not maintain speed particularly at up-slopes some times but at night it is normal. (probably fuel pump problem??) The problem of A/C withiching to defrost improved, that previously I had to off the cruiseor reduce the speed to bring the switch normal. However, it still persists. Can u or any one guide me what to do next?