My 98 V70 sat idle for 2 mos while I was out of town I went out to start it and it will crank over but will not start, well I first thought either fuel pump fuse , relay or pump in that order. Checked the fuse OK, replaced relay still won't start, next checked the pump, diconnected the connector checked for voltage nothing. I checked the pump with aux 12 volt power source pump runs fine. Checked the connectors for the relay no voltage with ignition on or when cranking, then I checked the fuse connectors again no voltage. Now I'm out of ideas, anybody have this problem or know what to check next, I don't have a wiring diagram to trace back to the next piece of the puzzle.

 

Have you checked the fuel lines? Its possible, especially after letting a car sit, that gas could coagulate in the lines. In that case, just take them off and use an air compressor to blow out the sediment. Can't tell you how many times that's happened to my lawnmower sitting in the shed over winter.

 

Chances are you have a bad CPS. It will stop your fuel pump from coming on as well. Do you have spark?

 

I've done some more testing and discovered that I don't have spark either and when I connected my ODBII reader I am getting a message that it is unable to establish a connection. Would this still be caused by an bad CPS?

 

CPS will stop spark. When our S70 failed to start I got a CPS from a junk yard for $5. When I went to unplug our old one, the plug fell apart in my hand.

 

Would a bad cps effect the connection of the ODBII to the ecm? I just put in a ECM that I got from Erie VoVo, they are only 10 mi from here , and still nothing, not start , and same message as before " can't establish connection to ecm" on my ODBII . Getting very frustrating.

 

No, that's not the issue. You likely need to set the scanner to the system and you'll be fine.

If you keep trying to start the motor without success, you may drylock the motor. That will cause other issues.

 

No I haven't let it crank any more than a few seconds. Not sure about what you are saying Re : "set the scanner to the system" I've had this scanner on this car several times before and it has always registered and gave me a readout.

 

Oh, well, I don't think the code reader connecting has anything to do with it not starting.

 

Well I'm no farther ahead than before any other ideas out there.

 

Hers's another update I just noticed that when I turn on the ignition w/out cranking the CHECK ENGINE light does not come on hence the reason that the odbII scanner is not reading the ECM. I've checked every fuse that I can see that is related to the ECM all good.

 

I just had this issue on Sunday. Was my air mass meter.

 

Hi ! Did you solve your problem? I have v70 2.4 10v, yr.1997 with no spark and fuel and also no ECM connection. I can connect/read ABS with obd but no ecm. Thanks.

 

There is a relay on these cars called the "main fuel injection relay" and this may have not come on for whatever reason. The symptoms point to that.

 

Look here at 2/32. This relay powers a bunch of stuff and also some of that is fused. Tthis is the 1998 Motronic version but probably the same as your car. Note here that on this diagram you can see this relay powering the fuel injectors. G is the power to the fuel pump relay. That should be sufficient for some troubleshooting.

Location here: