sam uk Posted November 20, 2011 Posted November 20, 2011 Hi guys, I've added a new k&n panel filter this weekend to replace the old dirty standard filter. Whilst i was on the job i decided to give the throttle body a clean in situe. I loosened off the pipe and maf and used a microfibre cloth and removed a lot of black crap from around the butterfly. After making two short journey's i noticed the power didn't seem as smooth. On the third journey the engine management light came on as i set off, joined by the esp light and the power seemed to back right off. Is there a likely cause of this? I'm kicking myself at the moment because i feel i've done more harm than good. Quote
Grantmitchell Posted November 20, 2011 Posted November 20, 2011 Possibly a vacuum leak I would guess, check all the hoses/pipes are back on tight There is a guide here http://www.350z-uk.com/forum/viewtopic.php?f=35&t=89 on how to read and reset a fault code Quote
sam uk Posted November 20, 2011 Author Posted November 20, 2011 I'm pretty sure it's all back together nice a tight, but i definately check again in the light to make sure. Worried that it might be something more serious. Quote
waltzinblack Posted November 20, 2011 Posted November 20, 2011 Did you do all the resetting procedures? Last time I cleaned my TB and moved the butterfly valve I had a really high idle and lumpy acceleration because it knocks it all out of sync. I did the ECU reset, Throttle valve position learn and accelerator position learn (they're called something like that!). Maybe if you don't do them after tinkering around the TB after a while it realises it's wrong and you get the light come on? Hopefully it's something as simple as that! Quote
Grantmitchell Posted November 20, 2011 Posted November 20, 2011 If you moved the butterfly while cleaning it , it may need recalibration Guide for this can be found http://www.350z-uk.com/forum/viewtopic.php?f=35&t=55272 here but check everything is back on good and tight first. Quote
sam uk Posted November 20, 2011 Author Posted November 20, 2011 Did you do all the resetting procedures? Last time I cleaned my TB and moved the butterfly valve I had a really high idle and lumpy acceleration because it knocks it all out of sync. I did the ECU reset, Throttle valve position learn and accelerator position learn (they're called something like that!). Maybe if you don't do them after tinkering around the TB after a while it realises it's wrong and you get the light come on? Hopefully it's something as simple as that! Sounds hopefull. No I have not done any resets what so ever. I've seen the proceedures instructions before and some seem a bit hit and miss. Should i just disconnect the battery overnight? Quote
sam uk Posted November 20, 2011 Author Posted November 20, 2011 If you moved the butterfly while cleaning it , it may need recalibration Guide for this can be found http://www.350z-uk.com/forum/viewtopic.php?f=35&t=55272 here but check everything is back on good and tight first. I definately moved the butterfly whilst cleaning. Quote
Dblock Posted November 20, 2011 Posted November 20, 2011 If its not just an idle reset, check your maf is screwed and in place. and clean that with maf cleaner then idle reset. Quote
ZMANALEX Posted November 20, 2011 Posted November 20, 2011 If you moved the butterfly while cleaning it , it may need recalibration Guide for this can be found http://www.350z-uk.com/forum/viewtopic.php?f=35&t=55272 here but check everything is back on good and tight first. I definately moved the butterfly whilst cleaning. That is your issue mate. The resets will soon fix it Alex. Quote
sam uk Posted November 20, 2011 Author Posted November 20, 2011 If its not just an idle reset, check your maf is screwed and in place. and clean that with maf cleaner then idle reset. Got some CRC maf cleaner on order but going to hold fire that until I check the pipes and do the idle reset. I'll update this post tomorrow after i give it a go. Quote
sam uk Posted November 20, 2011 Author Posted November 20, 2011 If its not just an idle reset, check your maf is screwed and in place. and clean that with maf cleaner then idle reset. Got some CRC maf cleaner on order but going to hold fire that until I check the pipes and do the idle reset. I'll update this post tomorrow after i give it a go. Thanks Alex i'll sleep a bit better tonight Quote
sam uk Posted November 20, 2011 Author Posted November 20, 2011 Being new to the forum and the car it's been great to get so much friendly advice. Thanks guys Quote
sam uk Posted November 21, 2011 Author Posted November 21, 2011 I've just reset the the idle and the engine light is now off. So far so good. Going to take it for a spin later to check everything is ok. One thing i noticed whilst stationary is that even the slightest touch on the accelerator causes the car to rev and hold for a couple of seconds at 1700 rpm. Is this normal? Quote
Ekona Posted November 21, 2011 Posted November 21, 2011 Sounds relatively normal for most dbw cars these days, certainly I remember my Zed doing something similar even if I don't recall the exact amount of revs it sat at. Quote
sam uk Posted November 21, 2011 Author Posted November 21, 2011 Been out for a gentle 10 minute spin and the engine light has stayed off, but there's definately a strange feel. The revs still seem to stick for a few seconds at around 1500 revs and the car seems to jump slightly when changing gear. Should I expect to drive it a bit more after the idle reset before things return to normal? Quote
sam uk Posted November 21, 2011 Author Posted November 21, 2011 Oh crap... Just realised i did an ecu reset instead of the idle reset. I take it the ecu rest doesn't reset everything? Quote
Dblock Posted November 22, 2011 Posted November 22, 2011 Oh crap... Just realised i did an ecu reset instead of the idle reset. I take it the ecu rest doesn't reset everything? Im sure you have to do both. No harm in it though. Quote
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