Backhoe will start up quickly and run for a few seconds then stall. After several tries at cranking will eventually start and run fine for the rest of the day, Same problem if sits for a day or longer.
Indicates air in the pump
very slow leak to allow pump pressure to drop to a point where it starts but then the supply is below requirement until the continued cranking removes the air and then the engine starts and runs
SOURCE: The car starts and immediately stalls unless I
Hey Jruthesq
The 850 is equipped with an Idle Air Control Valve (IACV) which supplies the engine with air when idleing (a necessity since the main throttle body valve is completely closed when no throttle is applied, thus the engine would lack air without the IACV when idleing). The IACV is suspended in a rubber mount on the front of the throttle body itself, and is easily removed and inspected/cleaned. If it's dead a good cleaning usually gets it going again. Also make sure that the air from the IACV is unhindered on its way from the IACV to the throttle body (it's actually common for the holes in the throttle body to be gunked up so bad by hardened carbon deposits that one sometimes needs a nail or even a drill to open it up again).
Just thought I'd mention this since you said that the gas needs to be feathered for the engine to start. When you press down on the gas the main valve in the throttle body opens up, closing the IACV and supplying the engine with enough air.
Oh and if your fuel pump relay is a green one marked 103 you should replace it with the new and improved red one. The relay is located under the fuse box cover under the hood. Remove the 4 torx srews holding the cover in place and you'll see the relays under there.
Good luck mate!
SOURCE: Volvo 850 intermittant starting after sitting several days
The power stage module,can do this on you vehicle after a hot restart
SOURCE: I need a routing diagram for serpentine belt on a John Deere 310SE backhoe?
You should be able to get that by going to the website for Gates rubber and belts.
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