Fuel pressure

My '97 Cav 2.2 is in a shop having a stumbling problem checked. I received a call stating that the fuel pressure was down to 59 PSI. Apparently, it shoould be around 70 PSI. Although I am not familiar with injection systems, it seems to me that everything should still function properly at 59 PSI.

Could the 11 PSI drop in pressure cause a stumble from idle? The car runs great at cruise speeds and part throttle.

Are there any factory specs on fuel pressure range?
Thanks,

That seem very high.....per the manual. Key on, engine not running is 41 -47 psi
You may have a defective pressure regulator or a pinched or clogged fuel return line.

JzJzz ...and the man from down under....Cheer mate !!!