Hi guys,
Just took my 92 FD for its MOT but it failed for the first time on emissions, they are meant to be below 3.5% but were 7%.
The car has an Apexi PFC fitted but passed last year with only 2.4% and i havent changed anything or modified the car further since then.
I read on here i could adjust the settings for fueling on the PFC to get it through the test but why would these have changed so much?
If i can get it through an MOT then that\'s a start but also concerned about the cause of the increase since last year, any ideas? Could i be damaging something by running the car like this?
Any advice would be great,
Ta
Is it an import? Do you still have a cat or air pump? Might be something like an O2 sensor being slightly off causing it to fuel slightly differently
Yeah its an import. I haven\'t removed cat or air pump no, does my car have a cat then? As I know it\'s exempt from the full emissions test due to the age.
If it was a UK spec FD then it wouldn\'t be exempt, but as its an import its ok, which is good lol it should have a cat, the UK spec cars have an extra cat on the downpipe, its odd as my FC with just an air pump (no cat, hasn\'t been fitted for over a decade) had a CO of 0.18%.
What sort of fueling do you have? Is it standard but with a PFC?
This might help, it seems that you just need to temporarily drop the PIM
http://www.mazdarotaryclub.com/forums/showthread.php?t=65458
Has pfc with twin apexi filters running on standard fuel pump and injectors.
Yeah I could do that for MOT I think so might be ok for pass but I\'m worried about damaging something by running so rich, something must have stopped working properly since last year as CO was much lower.
Does the PFC show what the O2 sensor is reading at idle? It might also say on the MOT printout, if thats out only slighly then it can cause all sorts of emission issues, also what oil temp does it say the car was at during the test? Perhaps the cat wasn\'t up to temperature, I know some owners put in \'cataclean\' before the MOT which apparently helps.
http://www.mazdarotaryclub.com/forums/showthread.php?t=65458
Might help looking at my video, and a bottle of cataclean. ;)
The printout says O2 was 0.24%
Doesn\'t say oil temp but I saw it was at running temp when I got back in it straight afterwards so was prob warm enough.
With the tip on the fuelling setting on pfc and the cataclean then test might be ok, but Im more concerned about an actual fault that I might need to fix as don\'t want to cause any running probs etc and that CO figure seems quite high compared to last years.
My car and my sons car both fail on the same symptom as yours every year, 5 years for my sons car. My engine has 4000 miles on it.it failed with 10 miles on it.
Some cars pass fine. Just drop you pim volts , pass your mot , put the pim volts back up and then enjoy.
silly question but was the emmisions tested at running temp or was it tested from cold?
Quote from: TRIND-FD;807144My car and my sons car both fail on the same symptom as yours every year, 5 years for my sons car. My engine has 4000 miles on it.it failed with 10 miles on it.
Some cars pass fine. Just drop you pim volts , pass your mot , put the pim volts back up and then enjoy.
Ok well that\'s reassuring as was worried I might damage the car driving it like this. I\'m pretty sure I can sort the mot either way but was just suprised the readings were so different to last year. The car seems to run fine and hasn\'t been using extra oil and tbh the fuel comsption seems normal too so perhaps it\'s nothing.
maybe the mot equipment is due for a calibration in the next few weeks or they have a dirty co2 filter on the machine or the water trap was full cause that would give you a false reading
If its any consolation, my FC is running epically rich, it makes your eyes hurt when its warming up before you drive off :)
did they put it on a cat or noncat setting
Quote from: adib;807191did they put it on a cat or noncat setting
The non cat test is a max CO of 3.5%, so it seems they have.
ok then so turn your pims setting down from 100% to 60% and it should take it from 7s to 2 and pass
do a search on here, theres a video that tells you how to turn your pims down on a pfc
The car hadn\'t really moved for a year so I guess that might not have helped either?
Where did you go for the MOT? I know an RX7 friendly garage in Brighton.
EDIT: talking rubbish lol
Where is the rx7 friendly garage? I am in Hove..
All sorted now thanks to cataclean and adjusting fuel settings. Thanks for your help guys :)
nice one :Thumbs-up
Quote from: kenwhiteside;810958Where is the rx7 friendly garage? I am in Hove..
Car and Van MOT in Southwick
Hey guys, bit of a thread highjack here, but my 92 FD Type R failed there last week on CO2 of 6.4%, ive trialed turning the pim volts down to 66% as the video shows but the car literally sounds like its about about to conk out when you do this, idles very very rough. Its fine at 70% but im not sure if this will be enough to get it through when I go for retest, any suggestions?
thanks
Niall
anyone with any answers?
Still running Air pump? Cat in? need details of car?