Thread: TPS and MAF settings

Originally Posted by PhilipA

So how many Litres per 100Km were you getting at first and how many now?
I had another thought.Tyres. You haven't changed to MTs?
Regards Philip A

Just tried to check the ohms on the temp sender switch and couldnt get a reading. I tried by inserting the multimeter probes into the connection and also on the switch itself. Then disconnected the switch and engine idled lower revs. Connected the switch and the idle went up, this on a warm engine so can I assume that it is working ok. Bob

You say you fitted the new amp 2 nights ago and the economy hasn't improved? My thoughts are the same as PhilipA's. I think you need to do a lot more kms before you can determine if you have a problem or not.
Average out the L/100kms over many complete empty to full tanks full to get your real figure of usage.
If you can get 16L per 100kms around town then you are doing very well!

Just tried to check the ohms on the temp sender switch and couldnt get a reading. I tried by inserting the multimeter probes into the connection and also on the switch itself. Then disconnected the switch and engine idled lower revs. Connected the switch and the idle went up, this on a warm engine so can I assume that it is working ok. Bob

The way I do it is to run the engine to normal operating temp,stop the engine, pull the connector off then measure the ohms across the two terminals. Should be around 300 ohms. If you cannot get a reading then something is wrong with your technique, meter or sensor.

I do not think you can asume it is correct if the idle went up, as the ECU may think its cold and raise the stepper in the event of the resistance being high.
15-16L per 100ks is IMHO better than is possible in urban conditions, so I think you may have initially miscalculated. The urban cycle for a 3.9 RRC is about 20 L per 100Ks and a disco is heavier .
Here are the figures from"Top car Guide " for a manual 3.5 injected Disco
City 18.6 country 11.7 average 15.7 L per 100kms and a manual is usually 1L per 100Kms better than an auto
Regards Philip A
Transmission and PerformanceTransm.
typeNum of
gearsWheel
driveAcceleration
to 100 km/hMax speedFuel consumption, ltr/100 kmCityRoadMixedEuromanual5AWD12.816318.611.715.7—
The last bit was acopy and paste which I did not think took but did . it says the same.