pinking sensor - was: bx16v phase 2 148bhp AFM adjustment
pinking sensor - was: bx16v phase 2 148bhp AFM adjustment
As the previous owner of my valver changed the settings of the air flow meter adjustment screw i'd like to set it back the way it should. Does anybody know the exact citroen procedure to set the AFM screw on a valver?
Last edited by roderick3 on Mon Jul 05, 2010 3:08 pm, edited 3 times in total.
bx 16v phase2 with original and working A/C and sunroof
yes I'm looking for another AFM... CO is much too high to pass MOT 
anybody more suggestions for the high CO?
ECU has 2 errors in it code 31 and 51 (ecu light sometimes lights for a minute or so). Most of the time the lights goes on when driving on the highway for about 10minutes. Can get rid of it by switching off the ignition after a minute or 2 of driving with the light on and then starting the car again. Errors stays away then for the rest of the day. Switching the ignition off and on directly as the lights comes on doesn't work. Errors stays there then. Just keep driving on the highway with the light on doesn't work either the light then can stay on for miles and miles. When driving in the city the light sometimes comes and goes by itself (not very often). If the ECU lights on when parking the car for a night it's still on the next day with cold start and driving the first 5 miles.
engine already has fresh spark plugs, new air filter (and new gearbox thanks to Mark who supplied the new box)
When the light's on the engine doesn't run different. I suspect the AFM at this moment or mayby the lambda. Not sure about the lambda though. Car has done about 128,000 miles
hope you can help me out
anybody more suggestions for the high CO?
ECU has 2 errors in it code 31 and 51 (ecu light sometimes lights for a minute or so). Most of the time the lights goes on when driving on the highway for about 10minutes. Can get rid of it by switching off the ignition after a minute or 2 of driving with the light on and then starting the car again. Errors stays away then for the rest of the day. Switching the ignition off and on directly as the lights comes on doesn't work. Errors stays there then. Just keep driving on the highway with the light on doesn't work either the light then can stay on for miles and miles. When driving in the city the light sometimes comes and goes by itself (not very often). If the ECU lights on when parking the car for a night it's still on the next day with cold start and driving the first 5 miles.
engine already has fresh spark plugs, new air filter (and new gearbox thanks to Mark who supplied the new box)
When the light's on the engine doesn't run different. I suspect the AFM at this moment or mayby the lambda. Not sure about the lambda though. Car has done about 128,000 miles
hope you can help me out
bx 16v phase2 with original and working A/C and sunroof
I've had this problem (on a none cat) where a friendly garage tried to adjust my fueling up 
and simply adjusted the AFM to death. Only just managed to get it started / running long enough to get it hope and go on the hunt for a replacement AFM.
If it is just the POT setting that is wrong, could you not measure the resistance of another POT and set yours to match?
and simply adjusted the AFM to death. Only just managed to get it started / running long enough to get it hope and go on the hunt for a replacement AFM. If it is just the POT setting that is wrong, could you not measure the resistance of another POT and set yours to match?
I don't think it's just the pot setting. CO was really way to high and adjusting the AFM with the CO meter didn't result in anything good only thing that changed was the ECU light going on think mine really died.
Thinking about changing the AFM for sure and the lambda most likely as well .
About the AFM setting procedure also for the phase 2 148bhp there is a citroen procedure just as there is for the 160bhp (that's what they said at my garage tonight) only problem is my garage doesn't have the 16V add-on with phase2 in his citroen manuals
think mine really died.Thinking about changing the AFM for sure and the lambda most likely as well .
About the AFM setting procedure also for the phase 2 148bhp there is a citroen procedure just as there is for the 160bhp (that's what they said at my garage tonight) only problem is my garage doesn't have the 16V add-on with phase2 in his citroen manuals
bx 16v phase2 with original and working A/C and sunroof
do you know which set of manuals they have (numbers wise), i dont think there is much if anything covering the AFM setup in the standard manuals, i suspect it would be a technical bulletin. I might have in amongst the manuals i have, if i get chance i'll have a look this evening. I would certainly be interested if its there.
Just out of interest, have you tried adjusting the rather big cog underneath the black cap on the AFM. I've used that before to increase fueling, it adjusts the spring rate on the variable resistor, anitclockwise to richen.
Just out of interest, have you tried adjusting the rather big cog underneath the black cap on the AFM. I've used that before to increase fueling, it adjusts the spring rate on the variable resistor, anitclockwise to richen.
yep well if you touch it, it doesn't work if the AFM is already broken 
anyway I bought a brand new original AFM on ebay few days ago hope to receive it soon!!! and indeed I won't touch the bloody screw
hope this solves my problems. Keep you posted.
anyway I bought a brand new original AFM on ebay few days ago hope to receive it soon!!! and indeed I won't touch the bloody screw
hope this solves my problems. Keep you posted.
bx 16v phase2 with original and working A/C and sunroof
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thanuttiscotsman
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Well, bought a new AFM mounted it and still no luck. Next one is the lambda. Have a new one now going to mount it soon + a new exhaust kitjayw wrote:Hence my first statement, "Bin It"NZ16v wrote:in my dads workshop manuals they basically say 'under no circumstances touch that bloody AFM"
Yeah reckon the technical bulletins might be the go
bx 16v phase2 with original and working A/C and sunroof
well as said brand new AFM mounted and just a few hours ago a new lambda still no luck this baby is trying very hard to make it very difficult!
the next one I'm going to replace is the exhaust kit (behind the engine the piece connecting the exhaust manifold to the exhaust).
Mayby you lot have more suggestions about which sensor to test or have a look at? AFM + lambda have been replaced and still the error stays. What can be wrong? the seal from the inlet manifold?
this baby is trying very hard to make it very difficult! the next one I'm going to replace is the exhaust kit (behind the engine the piece connecting the exhaust manifold to the exhaust).
Mayby you lot have more suggestions about which sensor to test or have a look at? AFM + lambda have been replaced and still the error stays. What can be wrong? the seal from the inlet manifold?
bx 16v phase2 with original and working A/C and sunroof
Check all your earths, clean and/or replace, and also, pull off the fabric tape and go through the injection loom, looking for breaks-any shorts will ruin the idle etc.
Dont reckon its a particular part, sounds more like a 20 year old car with a bit of an electrical fault.
Doin the above is free too!
Dont reckon its a particular part, sounds more like a 20 year old car with a bit of an electrical fault.
Doin the above is free too!
Would rather be driving ONE 16v,than fixng TWO.