Kwyjibo Posted April 30, 2009 Share Posted April 30, 2009 Hey guys, Just bought a used Z32 AFM and I'm a little worried its a fake as it has the Nissan logo on the side and I have heard some people say the dodgy ones have this. Apart from that the JECS sticker looks fine and the mesh is good(not sure what a 'bad'one looks like though). I was wondering if I could test it easily by checking the voltage of my standard AFM under 0 load at idle and up to around 5000 RPM, then wire in the Z32 AFM and do the same. Am I correct in thinking that the voltage should be linear against the air flow, and that the reading of the Z32 AFM should be approx 20% lower than the standard? I just don't want to do the test and think its faulty then find out that they are both meant to read the same up to the certain point, then the Z32 starts to read lower after say 3v or so. Also I know this will run the car lean for a second, will this be ok if I do it for a second while in neutral with 0 load? Cheers, ADrian Link to comment https://www.sau.com.au/forums/topic/267873-testing-for-faultyfake-z32-afm/ Share on other sites More sharing options...
Kwyjibo Posted May 2, 2009 Author Share Posted May 2, 2009 Anyone know if this would work? Link to comment https://www.sau.com.au/forums/topic/267873-testing-for-faultyfake-z32-afm/#findComment-4569771 Share on other sites More sharing options...
paulr33 Posted May 2, 2009 Share Posted May 2, 2009 this is what a fake z32 looks like youll note from the pics, the label is crooked, the mesh looks cheap and nasty the unit works but the voltage is all whakco and runs like a bucket of crap a legit Z32 should be around 0.5v at idle should have an orange JECS label on it http://paulr33.skylinesaustralia.com/photo...z32/page_01.htm Link to comment https://www.sau.com.au/forums/topic/267873-testing-for-faultyfake-z32-afm/#findComment-4570019 Share on other sites More sharing options...
Kwyjibo Posted May 2, 2009 Author Share Posted May 2, 2009 Hmmm ok. Mine looks like that except the JECS label doesn't look dodgy at all. Can't really see any problems with the mesh(sorry don't see what is cheap about the one pictured except it is deformed, mine isn't). Is the Nissan logo only on the dodgy AFM's? Link to comment https://www.sau.com.au/forums/topic/267873-testing-for-faultyfake-z32-afm/#findComment-4570079 Share on other sites More sharing options...
paulr33 Posted May 2, 2009 Share Posted May 2, 2009 nah the nissan logo is on the plastic casting, i originally thought it didnt contain nissan but it does, as jecs/bosch made AFMS for nissan whats the issue with yours? what car are you trying to use it on? what happens at idle? what ECU are you using? you cant it with a stock ecu Link to comment https://www.sau.com.au/forums/topic/267873-testing-for-faultyfake-z32-afm/#findComment-4570082 Share on other sites More sharing options...
Kwyjibo Posted May 2, 2009 Author Share Posted May 2, 2009 (edited) Nothing wrong with it as I don't have an ECU to run it on yet, I just stressed out when I saw a thread about them and mine looked the same(Nissan logo, sticker has JECS at bottom left rather than ÚNISIA JECS CORPORATION however it doesn't look dodgy). I was just hoping to test it in some way before I payed for a tune then had to go back but I guess its a legitimate one. Might try to quickly hook it up at idle on stock ECU just to see what voltage it reads. Edited May 2, 2009 by Kwyjibo Link to comment https://www.sau.com.au/forums/topic/267873-testing-for-faultyfake-z32-afm/#findComment-4570143 Share on other sites More sharing options...
Kwyjibo Posted May 3, 2009 Author Share Posted May 3, 2009 Ok just tested the AFM on standard ECU at stand still and logged the following voltages so if the AFM's are linear in their readings its a fake. Standard AFM: idle - 1.1v 2000 rpm - 1.45v 3000 rpm - 1.7v 4000 rpm - 2v 'Z32' AFM : idle - 1.1v 2000 rpm - 1.5v 3000 rpm 1.7v 4000 rpm 2v So can we confirm that the readings are in fact linear so I should be reading much lower at idle, like does it read lower only above a certain airflow(Paulr33 I know you said it should read 0.5 on idle but is this confirmed?) Link to comment https://www.sau.com.au/forums/topic/267873-testing-for-faultyfake-z32-afm/#findComment-4571280 Share on other sites More sharing options...
Kwyjibo Posted May 4, 2009 Author Share Posted May 4, 2009 Ideas anyone? Defintely a fake? Was going to test it under actual load today but one of the bolts on the turbo elbow snapped and I have a boost leak now so I don't imagine I would be getting full airflow. Link to comment https://www.sau.com.au/forums/topic/267873-testing-for-faultyfake-z32-afm/#findComment-4573734 Share on other sites More sharing options...
SXY_33 Posted October 1, 2009 Share Posted October 1, 2009 sorry for bringing up an old thread, is it ok to hook up the z32 to a stock ecu to just check it it idles at 0.5v using the datascan cable to confirm it is ok and genuine?? Link to comment https://www.sau.com.au/forums/topic/267873-testing-for-faultyfake-z32-afm/#findComment-4856766 Share on other sites More sharing options...
paulr33 Posted October 1, 2009 Share Posted October 1, 2009 technically yes Link to comment https://www.sau.com.au/forums/topic/267873-testing-for-faultyfake-z32-afm/#findComment-4856914 Share on other sites More sharing options...
SXY_33 Posted October 1, 2009 Share Posted October 1, 2009 thank you very much Paul, i have to say i appreciate all the work uve put towards helping others like me. Link to comment https://www.sau.com.au/forums/topic/267873-testing-for-faultyfake-z32-afm/#findComment-4856990 Share on other sites More sharing options...
R31Nismoid Posted October 1, 2009 Share Posted October 1, 2009 Just because it idle's or whatever doesn't neccesarily mean it'll work in my book Link to comment https://www.sau.com.au/forums/topic/267873-testing-for-faultyfake-z32-afm/#findComment-4856995 Share on other sites More sharing options...
paulr33 Posted October 1, 2009 Share Posted October 1, 2009 just turn the key to ON, no need to start it it should read 0.5v with the key at ON again agree with ash, voltage at diag vs running and working are two different things Link to comment https://www.sau.com.au/forums/topic/267873-testing-for-faultyfake-z32-afm/#findComment-4856999 Share on other sites More sharing options...
MrStabby Posted October 1, 2009 Share Posted October 1, 2009 Just because it idle's or whatever doesn't neccesarily mean it'll work in my book That way to interpret the results are, - if its not 0.5v with ignition on (NOT idle) its definitely a fake, or stuffed - if it is 0.5v with ignition on (NOT idle) it may or may not be a fake So you can only confirm the negative with that test. Link to comment https://www.sau.com.au/forums/topic/267873-testing-for-faultyfake-z32-afm/#findComment-4857118 Share on other sites More sharing options...
T04GTR Posted October 1, 2009 Share Posted October 1, 2009 interesting, so the aftermarket oe REPLACEMENT afm's from bosch are no good? why are they a oe replacment? putting a bigger airflow meter on with standard ecu is pointless. just like throwing a big four barrel on a mini... unless tuned you will go backwards. also the voltage logs above appear to have no real gain in putting a z32 on? as its outputing the same voltage? ie it will max out at the same cfm as standard it would appear. Link to comment https://www.sau.com.au/forums/topic/267873-testing-for-faultyfake-z32-afm/#findComment-4857141 Share on other sites More sharing options...
SXY_33 Posted October 1, 2009 Share Posted October 1, 2009 im obviously going to tune it. going to run a z32 with a nistune board. but i purchased a z32 afm the other day and only when i got home and started preparing the plug i noticed it is onli a 5 pin plug and socket, not 6. so is this a dead give away or do some come with the 5 pin plug, its in great condition, the sticker is straight and looks gen. i contacted the previous own how still claims is gen and said i can get my money back if im not happy. also doesnt have the nissan logo anywhere???? here r a few pics Link to comment https://www.sau.com.au/forums/topic/267873-testing-for-faultyfake-z32-afm/#findComment-4857298 Share on other sites More sharing options...
daisu Posted October 1, 2009 Share Posted October 1, 2009 The voltage logs were RPM vs AFM voltage. Air flow is not always proportional to engine RPMs. Although the tests were done in neutral, putting the Z32 AFM on would have effectively changed the tune of the car and hence you could not say that load was equal on both tests. The only real way to test it would be by comparing a known working Z32 AFM against the suspect one. Even still, I wouldn't have expected the voltages to be exactly the same. It could be possible that someone has gotten an RB20 or 25 AFM and put an orange sticker on it. I would say it's very likely since your AFM has a round shape 5 pin plug and Z32 AFMs have a square shape 6 pin plug. Link to comment https://www.sau.com.au/forums/topic/267873-testing-for-faultyfake-z32-afm/#findComment-4857361 Share on other sites More sharing options...
SXY_33 Posted October 2, 2009 Share Posted October 2, 2009 anyone confirm that its fake coz its onli a 5 pin plug??? Link to comment https://www.sau.com.au/forums/topic/267873-testing-for-faultyfake-z32-afm/#findComment-4858228 Share on other sites More sharing options...
SXY_33 Posted October 2, 2009 Share Posted October 2, 2009 well i just finished testing on ignition stock afm: 0.2v z32: 0.54. and now i put the stock back and its reading 5v and car wont turn on.... f**k!!!!!!!!! Link to comment https://www.sau.com.au/forums/topic/267873-testing-for-faultyfake-z32-afm/#findComment-4858436 Share on other sites More sharing options...
T04GTR Posted October 2, 2009 Share Posted October 2, 2009 have you messured the diametre of it? rb25 and z32 are both 80mm so a similar voltage would be expected i spose. also z32 is a old stlye hot wire design (thin wires in the airpath), where as 25 is a hot film design (flat plate in the airstream) thats not a z32 plug... mayby a late model one? if its got 30p anywhere in the part number its a z32 series. could it be out of a laural or something? Link to comment https://www.sau.com.au/forums/topic/267873-testing-for-faultyfake-z32-afm/#findComment-4859134 Share on other sites More sharing options...
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