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| 700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
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940 Turbo randomly stalls and wont turn onViews : 2156 Replies : 49Users Viewing This Thread : |
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Aug 14th, 2017, 21:19
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#21 |
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Junior Member
Last Online: Oct 9th, 2023 15:45
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Here is a video of the car running and a clip of the little RPM needle twitches (they were a lot more visible before I took my phone out).
https://youtu.be/PFf2Es5q-N8 If anything seems odd about how it's running, please let me know. |
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Aug 14th, 2017, 21:37
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#22 |
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Premier Member
Last Online: Yesterday 23:44
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Location: Lakenheath
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What codes have you got now?
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Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag  Volvo gone but not forgotten........
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Aug 14th, 2017, 22:31
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#23 |
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Junior Member
Last Online: Oct 9th, 2023 15:45
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Still the same 1-2-1.
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Aug 14th, 2017, 22:37
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#24 |
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Premier Member
Last Online: Yesterday 23:44
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Location: Lakenheath
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Seems very like the MAF/AMM at fault then. That's the second one i've know where the CPS and AMM/MAF have gone belly-up at the same time. Probably just age of the car i suppose.
If you find the ten digit Bosch part number on your current one and type it into ebay, you should find some new ones at sensible prices. 
__________________
Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........
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Aug 14th, 2017, 23:34
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#25 |
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Junior Member
Last Online: Oct 9th, 2023 15:45
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Turns out the MAF was changed 28k km ago, though the service book says it was for a used one so don't know how much it had been used. I will look into getting a new one.
Is it a normal thing to be unable to reset the codes if the error is constant? And if it's an issue with the MAF, shouldn't it start to choke on acceleration? |
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Aug 15th, 2017, 08:10
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#26 |
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Master Member
Last Online: Oct 8th, 2022 22:22
Join Date: Sep 2016
Location: Auckland
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its most unusual to not be able to reset codes. Can you describe how you are trying to do this?
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Aug 15th, 2017, 11:51
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#27 |
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Junior Member
Last Online: Oct 9th, 2023 15:45
Join Date: Aug 2017
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After holding down the button for a couple of seconds, the light should come back on after release shouldn't it? I hold it down and after that nothing happens, I do the exact same thing as on the other port where it works.
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Aug 15th, 2017, 14:42
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#28 |
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Junior Member
Last Online: Oct 9th, 2023 15:45
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Just went for another drive, car didn't shut off this time but the fuel consumption was noticeably higher than normal and there is a knocking sound when the revs are higher than 2k.
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Aug 15th, 2017, 16:33
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#29 |
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Premier Member
Last Online: Yesterday 23:44
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Location: Lakenheath
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What sort of knocking sound?
__________________
Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........
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Aug 15th, 2017, 17:04
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#30 |
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Junior Member
Last Online: Oct 9th, 2023 15:45
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It's hard to describe the knocking, all I can say is that it's very faint. My father can't even hear it while I can.
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