Hey tech

Just resolve all of the problems it was that I put the wrong MAF on my S80 i wascausing rich mixture the mechanic check the enginedid compresion tests and everything is great on the engine the problem was an electrical part like the MAF as I said and two coils, fuel filter mechanic told me never changed beforethe car still feel like heavy they check the timin belt it had oil on the timin belt and the car slip one tooth they change everything the bel the pulleys the tensioner but theres sometime now that is bugging me since I repaired my trans i runs and feel great but it says transmision service required pulled the codes and AP311 Input Speed Sensor what is that??????????????[:@][:@][:@]


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Gabyman

1990 740 GLE
1992 240DL
1994 940 Turbo Wagon
1999 Volvo S80 2.9

 

The input speed sensor measures the rpm of the torque convertor (I believe) and sends the information to the ECU. Check the circuit and replace the sensor if it is bad. I am not sure where it is located on the S80, but I don't think it is an expensive fix.

 

If the Sensor is Bad will this damage my transmision is this that can wait I Just put new timin belt, tensioner, water pump, engine belt, and a lot more, the input sensor cost $125.00 but can this wait or it has to be done right away the car still @ the mechanic. But they finish the car on thursday and I'm planing on using it but I don't if use it if the sensor is bad ?????????????????????????

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Gabyman

1990 740 GLE
1992 240DL
1994 940 Turbo Wagon
1999 Volvo S80 2.9

 

If it is there now, I would get it done. The information gathered from the speed sensor helps the ECU control shift points, line pressure and lockup for the torque convertor. It will affect performance and could cause damage in the long term.