Question about 1997 Volvo 850
1997 Volvo 850 GLT wagon. The car starts and then immediately stalls unless I feather the gas. It acts starved for fuel and eventually (after a few tries) will run fine. Loosened the gas cap and it did not help. It is like the fuel pump quits after a second or two. Please help. John
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!
Posted on Jul 08, 2009
FIRST CHECK THE FUEL PUMP RELAY???? AND FUEL FILTHER??? FUEL PRESSURE OK?? THEN CHECK THE FUEL--PUMP
Posted on Jul 02, 2009
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Posted on Jan 02, 2017
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