Discussion
Recent rough running, jumping erratic tick over, vicious "shunting" issues, all seems to have been eradicated for one trip by removing and spraying the AFM with aerosol cleaner. 20 miles covered in wonderfully responsive style.
Car was parked up and after a couple of hours started up to drive home with all the original problems back!!!!!
Any ideas??
The AFM was replaced 3 years ago with a new "Genuine Lucas" replacement, the car driven 400 miles without any issues,parked up for 3 years and the same old AFM shunting issues have returned.
So, the original AFM (I still have it!) -has no identification letters or numbers( looks like they wore off years ago) but only has 5 pins on the wiring connector, with only 4 pins on the actual AFM socket. Whereas, the replacement has 6 pins on the actual AFM unit, but is connected to the existing plug with only 4 pin outs on it !!!!
All very confusing, which new AFM do I buy? , ones on eBay supposedly suitable for 1994 erra Rovers, are £50 and guaranteed for ten years. Or the later 6 pin version for presumably later years cars?
Help please with your thoughts/ experiences.
The current (recently failed AFM) is a Lucas FDM974. P65015 unit, which doesn't seem to cross reference with any of the units offered for sale at present???
Genuine Lucas ones are really non- existent aren't they,now..?????
Regs
Phil.
Car was parked up and after a couple of hours started up to drive home with all the original problems back!!!!!
Any ideas??
The AFM was replaced 3 years ago with a new "Genuine Lucas" replacement, the car driven 400 miles without any issues,parked up for 3 years and the same old AFM shunting issues have returned.
So, the original AFM (I still have it!) -has no identification letters or numbers( looks like they wore off years ago) but only has 5 pins on the wiring connector, with only 4 pins on the actual AFM socket. Whereas, the replacement has 6 pins on the actual AFM unit, but is connected to the existing plug with only 4 pin outs on it !!!!
All very confusing, which new AFM do I buy? , ones on eBay supposedly suitable for 1994 erra Rovers, are £50 and guaranteed for ten years. Or the later 6 pin version for presumably later years cars?
Help please with your thoughts/ experiences.
The current (recently failed AFM) is a Lucas FDM974. P65015 unit, which doesn't seem to cross reference with any of the units offered for sale at present???
Genuine Lucas ones are really non- existent aren't they,now..?????
Regs
Phil.
Edited by l10tus on Friday 6th June 00:25
There are 2 different types of Afm, the 3 am and the 5am, from memory they are interchangeable but i cannot remember sorry about the number of connection pins.
The wiring connector to it can be a problem, both dirty and loose connections. You can do what is called a drag test on the terminals but you need to take care you do not spread them any more.
You can carry out some voltage tests on it too, do not just go throwing parts at it as you will not get anywhere
There is a very nice gentleman here by the name of Frank (blaze_away) that can analyse some data for you if you have Rovergauge and send him the logs.
Hopefully he will pop up soon.
Great info on testing here.
http://www.g33.co.uk/pages/technical-fuel-injectio...
The wiring connector to it can be a problem, both dirty and loose connections. You can do what is called a drag test on the terminals but you need to take care you do not spread them any more.
You can carry out some voltage tests on it too, do not just go throwing parts at it as you will not get anywhere
There is a very nice gentleman here by the name of Frank (blaze_away) that can analyse some data for you if you have Rovergauge and send him the logs.
Hopefully he will pop up soon.
Great info on testing here.
http://www.g33.co.uk/pages/technical-fuel-injectio...
Edited by Belle427 on Friday 6th June 07:16
Edited by Belle427 on Friday 6th June 07:18
Yes, of I have been contacted by Frank, I don't have Ro engage up and running yet, but plan to send him details when I do. Thanks for your reply.
It was just that although I can't believe the fact that after replacing the AFM and doing only 400 miles, it has failed.
The original one looks like it had been on the car since new!
Just hoping someone could educate me about the number of pin outs on the units and why only 4 no. Connectors are in the AFM lead but the actual units seem to have 3, 5 then 6 ( later version) pins????
It was just that although I can't believe the fact that after replacing the AFM and doing only 400 miles, it has failed.
The original one looks like it had been on the car since new!
Just hoping someone could educate me about the number of pin outs on the units and why only 4 no. Connectors are in the AFM lead but the actual units seem to have 3, 5 then 6 ( later version) pins????
The connector is indeed 6 pins only 4 of which are used on all chims/griffs.
The wires are
12v supply
Earth
MAF signal
CO adjustment
Note.
CO adjustment is only effective when running a non lambda map
Best advice is still get RoverGauge up and running so we can see what's going on. It could be any number of things but without some data we'd just be guessing.
The wires are
12v supply
Earth
MAF signal
CO adjustment
Note.
CO adjustment is only effective when running a non lambda map
Best advice is still get RoverGauge up and running so we can see what's going on. It could be any number of things but without some data we'd just be guessing.
Oh, ok for the replies.
I'm still not up and running with RG. I have it installed on my Samsung Phone, with all the dashboard items, but when connected to the ECU, it won't read any data, even though the led lights are flashing on the connection lead?
Cleaned the AFM with aerosol again, re- connected the battery isolator, started straight up from cold, then drove 10miles, absolutely no issues again!
Stopped at a friend's for coffee, started up absolutely first turn of the key - THEN DROVE LIKE A BAG OF BONES AGAIN, COUGHING SPLUTTERING, HUNTING, SHUNTING, TERRIBLE!
Got to thinking this must be temperature sensor related???
Yes, I know - GOT TO CONNECT Rovergauge!
Trying to do that before next cold start!
I will report back!
I'm still not up and running with RG. I have it installed on my Samsung Phone, with all the dashboard items, but when connected to the ECU, it won't read any data, even though the led lights are flashing on the connection lead?
Cleaned the AFM with aerosol again, re- connected the battery isolator, started straight up from cold, then drove 10miles, absolutely no issues again!
Stopped at a friend's for coffee, started up absolutely first turn of the key - THEN DROVE LIKE A BAG OF BONES AGAIN, COUGHING SPLUTTERING, HUNTING, SHUNTING, TERRIBLE!
Got to thinking this must be temperature sensor related???
Yes, I know - GOT TO CONNECT Rovergauge!
Trying to do that before next cold start!
I will report back!
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