Discussion
Hi all
I was out with the tvr club Sunday and I had a couple of comments about the smell if unburnt fuel and a wisp of black smoke on hard acceleration. I'll have a look at getting rover gauge will it run on Windows 11?? The pin connector on the maf is split and the black plastic cover has been off at some point and the wires resoldered so it's seen better days
Thanks Dan
I was out with the tvr club Sunday and I had a couple of comments about the smell if unburnt fuel and a wisp of black smoke on hard acceleration. I'll have a look at getting rover gauge will it run on Windows 11?? The pin connector on the maf is split and the black plastic cover has been off at some point and the wires resoldered so it's seen better days
Thanks Dan
The problems with the connector are not going to get better by replacing the MAF itself. You could ask locals to you if they have RoverGauge (RG) I believe it will run on windows 11. If you are in Midlands area I could run the logs for you.
From your description RG will help us pinpoint the issue. It might be that the MAF connector is preventing signal getting to the ECU. It's possible to do basic checks with volt meter.
There are 4 wires a 12v supply, earth, signal and CO
From memory
brown/red 12v
Red/Black earth
Blue/Green signal
Blue/Red CO trim
Signal is the one to focus on at idle it should be 1.3 ish
Will check and let you know exact correct info. All now corrected.
From your description RG will help us pinpoint the issue. It might be that the MAF connector is preventing signal getting to the ECU. It's possible to do basic checks with volt meter.
There are 4 wires a 12v supply, earth, signal and CO
From memory
brown/red 12v
Red/Black earth
Blue/Green signal
Blue/Red CO trim
Signal is the one to focus on at idle it should be 1.3 ish
Will check and let you know exact correct info. All now corrected.
Edited by blaze_away on Monday 22 April 17:21
Edited by blaze_away on Monday 22 April 18:03
Here's the test procedure from ACT PRODUCTS
https://www.actproducts.co.uk/2011/lucas-14cux-fue...
Testing is performed in the following manner. Peel back the rubber boot on the airflow meter connector and leave it plugged in to the airflow meter. Set up the digital multimeter to read voltage. Insert the negative probe into the Red/Black wire (sensor ground), and the positive into the Blue/Green wire (Airflow signal).
Turn on the ignition, but do not start the engine. The meter should immediately indicate a reading of approximately 0.3-0.34 Volts. Most defective airflow meters will overshoot to 0.5 Volts or higher, and take at least 2 seconds to come down to the correct voltage.
Now start the engine, and the reading should rise to 1.6 Volts (3.5 Litre engine) to 1.75 Volts (5.0 Litre engine).
The next test is full load, and as with the fuel pressure test it will require use of a rolling road or a steep hill in the same manner. Under full load the voltage should rise to 4.45 Volts (3.5 Litre engine) to 4.95 Volts (5.0 Litre engine).
https://www.actproducts.co.uk/2011/lucas-14cux-fue...
Testing is performed in the following manner. Peel back the rubber boot on the airflow meter connector and leave it plugged in to the airflow meter. Set up the digital multimeter to read voltage. Insert the negative probe into the Red/Black wire (sensor ground), and the positive into the Blue/Green wire (Airflow signal).
Turn on the ignition, but do not start the engine. The meter should immediately indicate a reading of approximately 0.3-0.34 Volts. Most defective airflow meters will overshoot to 0.5 Volts or higher, and take at least 2 seconds to come down to the correct voltage.
Now start the engine, and the reading should rise to 1.6 Volts (3.5 Litre engine) to 1.75 Volts (5.0 Litre engine).
The next test is full load, and as with the fuel pressure test it will require use of a rolling road or a steep hill in the same manner. Under full load the voltage should rise to 4.45 Volts (3.5 Litre engine) to 4.95 Volts (5.0 Litre engine).
I had a similar issue and traced it to crispy wiring on the mag connector replaced with this
https://www.ebay.co.uk/itm/225388669934
All perfect
https://www.ebay.co.uk/itm/225388669934
All perfect
DAN3801 said:
Hi all
I was out with the tvr club Sunday and I had a couple of comments about the smell if unburnt fuel and a wisp of black smoke on hard acceleration. I'll have a look at getting rover gauge will it run on Windows 11?? The pin connector on the maf is split and the black plastic cover has been off at some point and the wires resoldered so it's seen better days
Thanks Dan
You should do the test with the voltmeter before. This could be related to other issues with ignitions. I was out with the tvr club Sunday and I had a couple of comments about the smell if unburnt fuel and a wisp of black smoke on hard acceleration. I'll have a look at getting rover gauge will it run on Windows 11?? The pin connector on the maf is split and the black plastic cover has been off at some point and the wires resoldered so it's seen better days
Thanks Dan
As zeb says do voltmeter tests first. Rovergauge data will then enable me to evaluate the maf and all the other sensors under engine running conditions.
The MAF specifically suffers from heat damage which then causes the maf signal to noise ratio to decrease (ie signal gets more noisy).
To summarise the MAF can pass all the volt meter tests but still fail the RoverGaige tests.
The MAF specifically suffers from heat damage which then causes the maf signal to noise ratio to decrease (ie signal gets more noisy).
To summarise the MAF can pass all the volt meter tests but still fail the RoverGaige tests.
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