1986 Volvo 740 gle (unsure on problem)

[sethvolvo740gle86]

I have an 86 740 gle and if my car sits for (usually) 8 hours or longer, or overnight, and I go to start it. it's turns over fine, and the writhing a few seconds dies. If I give it gas it sometimes stays on but otherwise dies. if I try to start it again it will start and drive fine. I'm thinking it might be a failing fuel pump or fuel pump relay. if I shift it into neutral and give it some gas, then let off the pedal, the engine Rpms go up and down and it idles rough. I recently did a partial tranny fluid change (used 3 quarts of dextron 3), cleaned the throttle body, and another valve that was on top of the fuel injectors.any help in finding the problem is appretiated

[lummert]

Investigate fuel pressure regulator.

[93Regina]

86 740....few seconds dies...if I try to start it again it will start and drive fine.

Runs Fine - Everything is Good

Potential Electrical Issues:

1. Fuel Pump Relay
2. Radio Suppressor Relay

See this thread for more details