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- 4,704
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- Rotherham
No full engine see above
Weird MAF sensor fault
- Thread starter Rubberknees
- Start date
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- Posts
- 4,704
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- Rotherham
That's correct. No wiring for IAT sensor
- Posts
- 58,170
- Location
- Preston Lancs.
Right then, on EGR equipped cars IAT is a low preset in the ECU. ECU relies on MAF for running air temp readings. Normally if you have EGR fitted but disconnect the vac pipe to EGR valve car will run normally without issue. However EGR only runs at a steady fairly lightly loaded road speeds. It does not work at idle or on acceleration or when the engine is under load. If the MAF has gone duff and is feeding crap to the ECU the ECU may think EGR is operating and prevent high load fuelling. The ECU will only allow fuel to be injected that can be cleanly burned by what it thinks is the oxygenated air present in the cylinder. If the MAF is telling the ECU the airflow has dropped as it does when EGR is active, then that will cause your problems. If you run the car with MAF disconnected in your case the preset will be used for IAT. This may slightly change fuel usage as the fine metering adjustment extrapolated from IAT/ fuel temp and engine temp will not be as fine. Fitting good MAF is best option.
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- 4,704
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- Rotherham
That is easily explained for me to understand and is exactly what happens.
Many thanks sir. I will see what I can pick up tomorrow as am reluctant to buy another so called new one. Is it worth trying to clean the Maf?
- Posts
- 58,170
- Location
- Preston Lancs.
You can try but the success rate i would suggest is not good.
- Posts
- 4,704
- Location
- Rotherham
OK thanks for all your help. You certainly know your stuff and it is greatly welcomed
- Posts
- 4,704
- Location
- Rotherham
Update Got replacement Maf sensor (not Chinese copy this time) £30All is well again
Trying to find thread about nanocom trying to force blend motor but another one moves because of fault, I have same problem. Have narrowed it down to faulty potentiometer in dodgy blend motor
Trying to find thread about nanocom trying to force blend motor but another one moves because of fault, I have same problem. Have narrowed it down to faulty potentiometer in dodgy blend motor
- Posts
- 58,170
- Location
- Preston Lancs.
There are or were anomalies with early Nanocom for sure, like when you try to alter temps left and right side. Right control moves left side and vice versa. I reported this to Black box possibly before Nanocom was on general sale but i don't think anything was ever done about it.Update Got replacement Maf sensor (not Chinese copy this time) £30All is well again
Trying to find thread about nanocom trying to force blend motor but another one moves because of fault, I have same problem. Have narrowed it down to faulty potentiometer in dodgy blend motor
- Posts
- 4,704
- Location
- Rotherham
That's exactly what happens. Try and move left (which is problem one) and right one moves. Really weird. But right one moves when asked to.
