Hi. I'm posting this in hopes that someone has had a similar experience and might be able to share some helpful advice. I have a 1993 850 GLT that just recently has had intermittent engine stalling problems. The engine cuts out only while being driven, not while idling as far as I have experienced. After each episode, the fuel pressure is quite low(pressed pen against valve pin and fuel merely dribbled out). For the past week, I have had my car continually checked out by volvo master technicians who cannot seem to reproduce the problem. I have tried to help them by driving the car around myself, trying to reproduce the problem with a fuel pressure gauge hooked up. I have not been able to reproduce the problem with this gauge hooked up and neither have the technicians. I removed the gauge, thinking that for some reason it may be influencing the system, and the stalling problem recurred within 100 yds of driving. Once again, the fuel pressure was low. I put the gauge back on, and the car drove fine for miles. The technicians do not seem to think that the gauge has any involvement, yet the statistics seem to indicate that it does. In the mere 15 min of driving without the gauge, it has stalled 3 times. It hasn't stalled once in over 2 hours of driving with the gauge hooked up. Could the valve be leaking fuel pressure that is otherwise compensated for with the pressure gauge hooked up? Any ideas would be greatly appreciated!