Today i measured MAF signal voltage (2,4 pins) it reads 1.00V on idling and smoothly increasing when i throttle.
I drove the car about 20 minute everything is ok. 20 minute later i started the car and it died. I unplug the MAF sensor cable and when i start the car it starts hardly but idles good. After this i read dtc codes and clear the MAF error codes, i plug the MAF sensor cable and then it idles good again.
Also i just realized this: My car have LPG and LPG heater is side by side with MAF sensor. MAF sensor cable is very hot because LPG heater. Additionaly MAF sensor cable and main ignition cable are also side by side.
What do you think? I want to move MAF sensor cable another route.
96 850 Turbo Rough idle and die Topic is solved
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misha
- Posts: 5379
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- Year and Model: '97 850 2.5 20v
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Sequential or Venturi LPG system?
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
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misha
- Posts: 5379
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- Year and Model: '97 850 2.5 20v
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Did you tried to put lpg ecu on diagnostic?
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
-
misha
- Posts: 5379
- Joined: 7 December 2008
- Year and Model: '97 850 2.5 20v
- Location: Serbia
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I think that you can't move Maf cable because it have no additional length.
Did you zip tied it?
Did you zip tied it?
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
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Sommerfeldt
- Posts: 1148
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- Year and Model: 2018 S90 T8
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If you loosen both clamps on the MAF, you can rotate it so the connector points downwards/angled down, and then zip tie the excess wire to take up some of the slack. That might get it away from the coil cable somewhat.
- S
- S
2018 S90 T8 Inscription - glossy black with amber interior and dark as night rear windows.
[Gone] '96 855 T5 - R bumper and spoiler, Koni Yellows & blue H&R springs all 'round.
[Sold] '97 S70 T5
[Gone] '95 855 T5-R - one of the black ones... sadly stolen and wrecked.
[Gone] '96 855 T5 - R bumper and spoiler, Koni Yellows & blue H&R springs all 'round.
[Sold] '97 S70 T5
[Gone] '95 855 T5-R - one of the black ones... sadly stolen and wrecked.
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misha
- Posts: 5379
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Maf is secured with 2 torx bolts onto the airbox.
It's not the clamps which holds it to the airbox.
Clamps are holding the ribbed hose.
It's not the clamps which holds it to the airbox.
Clamps are holding the ribbed hose.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
-
Sommerfeldt
- Posts: 1148
- Joined: 29 July 2008
- Year and Model: 2018 S90 T8
- Location: Oslo Area, Norway
- Has thanked: 55 times
- Been thanked: 42 times
Whoops... you're right, of course. I don't have the airbox anymore, and can rotate it like that. I guess I forgot how it's actually supposed to be.
- S
- S
2018 S90 T8 Inscription - glossy black with amber interior and dark as night rear windows.
[Gone] '96 855 T5 - R bumper and spoiler, Koni Yellows & blue H&R springs all 'round.
[Sold] '97 S70 T5
[Gone] '95 855 T5-R - one of the black ones... sadly stolen and wrecked.
[Gone] '96 855 T5 - R bumper and spoiler, Koni Yellows & blue H&R springs all 'round.
[Sold] '97 S70 T5
[Gone] '95 855 T5-R - one of the black ones... sadly stolen and wrecked.
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volkans80
- Posts: 33
- Joined: 6 June 2013
- Year and Model: 96 850T5, 08 XC70 D5
- Location: Turkey
- Has thanked: 1 time
Because of car's age i already planned some parts change. I decided to do some parts today and i changed crankshaft sensor, temperature sensor and thermostat with original volvo parts also i resetted ecu and i changed MAF sensor cable route and zip tied. Now it is going to left side of the MAF. From left to right 1.MAF sensor cable 2.MAF 3.LPG Heater. But i doubt LPG heater increases MAF sensor heat maybe also sucked air. There is not a rough idle now but i am not sure yet.
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