Question about 1999 Volvo V70

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99 Volvo V70 seems to stall and vaporlock, after running. The car shows an ETS light, which I understand to be the Electronic Throttle Sensor. It has shown this light for over a year, but has not given any obvious signs of problem. My wife started her car and drove roughly 4 miles before it began losing power and eventually stalled out as she was pulling to the side of the road. Long story short, we were able to get it started and it drove fine for the 3 miles or so home. When she stopped to check the mail, it died. Waited about a minute or two, started it up, and it ran for a few seconds and died again. This time we waited about 5 to 10 minutes and tried it again, and it ran well enough to pull it into the garage and shut it down. My theory: either the check valve in the fuel pump or the throttle control sensor or throttle position sensor (but that just doesn't sound quite logical). Thoughts?

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  • Michael Pickering
    Michael Pickering Nov 14, 2013

    I changed the fuel filter, sock, and fuel pump. I cleaned the throttle body. The IACV was replaced about a year ago, and what's weird is that it doesn't die every time it stops (the IACV would cause that). It also won't die out if it's sitting in the driveway. It's not until it's driven down the road a piece that it does it.
    What's weird about that, however, is that I test drove it and it was perfect. The next morning, my wife drove it almost exactly half the distance (the point where I turned around and came back), and it died on her.
    I'm thinking it's the fuel check valve, but I don't know where it is. I heard it's in the engine compartment, as opposed to in the tank, but I really have no idea (haven't had the opportunity to check, either).

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  • 377 Answers

Change your fuel filter ..your vehicle will run but your fuel pressure is weak ..also after this clean your fuel injectors by pouring injection cleaner in your gas ,,it will correct itself..Also ,,if none of what I stated works ,,Spark plugs and new spark plug wires needed ,,Lastly your fuel pump

Posted on Oct 23, 2013

  • 1 more comment 
  • Michael Pickering
    Michael Pickering Nov 14, 2013

    Changed fuel filter and fuel pump. Car drove a few miles and then continued to stall out.

  • Michael Pickering
    Michael Pickering Nov 14, 2013

    I changed the fuel filter, sock, and fuel pump. I cleaned the throttle body. The IACV was replaced about a year ago, and what's weird is that it doesn't die every time it stops (the IACV would cause that). It also won't die out if it's sitting in the driveway. It's not until it's driven down the road a piece that it does it. What's weird about that, however, is that I test drove it and it was perfect. The next morning, my wife drove it almost exactly half the distance (the point where I turned around and came back), and it died on her. I'm thinking it's the fuel check valve, but I don't know where it is. I heard it's in the engine compartment, as opposed to in the tank, but I really have no idea (haven't had the opportunity to check, either).

  • Michael Pickering
    Michael Pickering Jan 09, 2014

    Turned out to be the fuel pump relay. I've Never seen a relay act like that, but there ya go!

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Posted on Jan 02, 2017

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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!

Posted on Jul 08, 2009

  • 1 Answer

SOURCE: My Volvo 960 stalls while driving

It could be a number of things. Fuel Flow problem, or electrical apparatus heats up and works inefficiently. You could start from the cheaper, less strainous solutions, in this order: Change Fuel Filter, and clean Nozzles. Fuel Pump, Air Mass Meter.

Posted on Mar 29, 2009

roy7777
  • 109 Answers

SOURCE: 91 volvo stalls at anytime

TRY ANOTHER FUEL PUMP AND FUEL FILTHER THESE PUMPS ARE FUNNY ON VOLVOS HAD SAME PROBLEM ON 850 TURBO AND SURE ENOUGG IT WAS THE PUMP

Posted on Apr 12, 2009

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