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1999 Volvo V70

Tiny
TEDERIG
  • MEMBER
  • 1999 VOLVO V70
1999 Volvo V70

just put a junk yard motor in this- 5 cyl. Front oxygen sensor stays at.5 volts at idle, goes up and down respectively when I pull of a vacuum line or spray in some carb cleaner, so I know the sensor can change. Rear sensor moves from about.3 -, 7 volts at idle. What would keep this from going into good fuel control and front sensor osccillating? All other pids seem to be good- closed loop, iat, coolant, etc. Any help would be appreciated.
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Sunday, March 15th, 2009 AT 5:00 PM

1 Reply

Tiny
RACEFAN966
  • MECHANIC
  • 5,029 POSTS
Ok this could be because of any one or more of the following. Distributor cap, rotor, wires, plugs, air filter, fuel filter, mass air flow meter dirty (should only be cleaned with mass air flow cleaner nothing else), coolant temp sensor, air charge temp sensor and more. So with that list the basics are listed first as that is where I prefer to start let me know what is new and what isn't and we can do a couple of tests from there if you have a digital multi meter.
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Monday, March 16th, 2009 AT 1:10 PM

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