350 Russ Posted August 20, 2016 Share Posted August 20, 2016 A few weeks back my zeds engine management light came on and the zed only running on 5 cylinders periodically. It would only happen briefly. I took it to Japex and they plugged it into their computer which gave the reading of a previous fault on a coil pack/spark plug. Fault was cleared and all good until now. The lights back on and she's running on 5 again but not all the time. Im thinking order a new set of coil packs and change them as the spark plugs are about 4 years and 10,000 miles old so should be ok? I tried to take a video of how its running but it didnt come out very well. Quote Link to comment Share on other sites More sharing options...
Ekona Posted August 20, 2016 Share Posted August 20, 2016 Swap coil packs around until you find the duff one 1 Quote Link to comment Share on other sites More sharing options...
Adrian@TORQEN Posted August 20, 2016 Share Posted August 20, 2016 Best to find out which one it is and replace only that, preferably with used one from breakers as they are stupidly expensive: http://www.torqen.uk/nissan/350z/fuel-ignition/coil-packs/1766-350z-de-nissan-oem-ignition-coil-pack-22448-al61c.html Quote Link to comment Share on other sites More sharing options...
350 Russ Posted August 20, 2016 Author Share Posted August 20, 2016 The problem with trying to find the duff one is that it isn't all the time. i went for a drive earlier with the aim of waiting until it goes again then unplug each coil pack until the engine note doesn't change. But I drive around for 45 mins with a problem then it went, by then the engine is red hot and you can only get to 3 of them as 3 are under the air intake. I have a spare I bought from eBay as a guaranteed working and tested one but its just finding the problematic one first Quote Link to comment Share on other sites More sharing options...
Richf Posted August 20, 2016 Share Posted August 20, 2016 I'd check/change the plugs first , just use copper ones they are cheap enough and cheaper than buying coil packs Quote Link to comment Share on other sites More sharing options...
350 Russ Posted August 20, 2016 Author Share Posted August 20, 2016 So just been out in it again, I took all the bolts out holding the coil packs on the driver side bank hoping that when it goes again i can just pull them out of their tubes one by one to find the culprit. BLOODY RUNNING GREAT AGAIN!!!!! but the dash is still lit up!!!! :angry: :rant: :bang: Quote Link to comment Share on other sites More sharing options...
350 Russ Posted September 3, 2016 Author Share Posted September 3, 2016 Right so just to keep this thread put to date incase it helps someone in the future. Ive purchased aN OBDII reader for JDM cars and read the fault which reads as P0350 Ignition signal primary. Also i have a whistling noise coming through the stereo which is saying to me there is a bad earth, after doing some research I'm going to check the earth that bolts to the front of the timing cover under the engine cover. Ill post back with results. Quote Link to comment Share on other sites More sharing options...
Beefy Posted October 24, 2016 Share Posted October 24, 2016 Subscribing, as I have the exact same problem at the moment. Always notice it happens when the car is hot. If I turn the engine off/on when warm it'll usually do it until I get to about 1.5K rpm, then just magically fire back up to 6... How did you get on bud? Quote Link to comment Share on other sites More sharing options...
Ricey Posted October 24, 2016 Share Posted October 24, 2016 Did the code not confirm the affected cyclinder when it threw the eml? Sent from my SM-G925F using Tapatalk Quote Link to comment Share on other sites More sharing options...
Ricey Posted October 24, 2016 Share Posted October 24, 2016 Right so just to keep this thread put to date incase it helps someone in the future. Ive purchased aN OBDII reader for JDM cars and read the fault which reads as P0350 Ignition signal primary. Also i have a whistling noise coming through the stereo which is saying to me there is a bad earth, after doing some research I'm going to check the earth that bolts to the front of the timing cover under the engine cover. Ill post back with results. Think the zed has an alternator suppressor which can causs that symptom with the radio if it fails. I still say its a coil pack breaking down when its being put under load. Sent from my SM-G925F using Tapatalk Quote Link to comment Share on other sites More sharing options...
350 Russ Posted October 25, 2016 Author Share Posted October 25, 2016 Subscribing, as I have the exact same problem at the moment. Always notice it happens when the car is hot. If I turn the engine off/on when warm it'll usually do it until I get to about 1.5K rpm, then just magically fire back up to 6... How did you get on bud? I changed all the coil packs in the end, it seems to have sorted it for now but that's only me testing it by letting it tick over on the driveway as the MOT has expired now. Quote Link to comment Share on other sites More sharing options...
Kieran O'Quick Posted October 25, 2016 Share Posted October 25, 2016 Subscribing, as I have the exact same problem at the moment. Always notice it happens when the car is hot. If I turn the engine off/on when warm it'll usually do it until I get to about 1.5K rpm, then just magically fire back up to 6... How did you get on bud? The code readers struggle to spot the ropey coil. If it's running badly when hot you can spot the bad coil by cooling them down in turn - when you cool the right (wrong) coil your engine note should improve. Saves the expense of replacing all the coils (Disclaimer : I'm not a mechanic so don't know if it's the correct thing to do, just going on what worked for me). Quote Link to comment Share on other sites More sharing options...
Rob332 Posted October 25, 2016 Share Posted October 25, 2016 If its not obvious, I usually remove each spark plug in turn. You can usually tell which coil pack is faulty, as the corresponding plug will still be wet with fuel indicating that particular cylinder has not fired. Quote Link to comment Share on other sites More sharing options...
Beefy Posted October 30, 2016 Share Posted October 30, 2016 Did the code not confirm the affected cyclinder when it threw the eml? Sent from my SM-G925F using Tapatalk Subscribing, as I have the exact same problem at the moment. Always notice it happens when the car is hot. If I turn the engine off/on when warm it'll usually do it until I get to about 1.5K rpm, then just magically fire back up to 6... How did you get on bud? The code readers struggle to spot the ropey coil. If it's running badly when hot you can spot the bad coil by cooling them down in turn - when you cool the right (wrong) coil your engine note should improve. Saves the expense of replacing all the coils (Disclaimer : I'm not a mechanic so don't know if it's the correct thing to do, just going on what worked for me). Subscribing, as I have the exact same problem at the moment. Always notice it happens when the car is hot. If I turn the engine off/on when warm it'll usually do it until I get to about 1.5K rpm, then just magically fire back up to 6... How did you get on bud? I changed all the coil packs in the end, it seems to have sorted it for now but that's only me testing it by letting it tick over on the driveway as the MOT has expired now. Thanks for the help and advice gents. So I went for a bit of an experimentation run with the Z over the last week. Various speeds, operating temps, etc. The only consistent way of causing the misfire and EM to throw a wobbly is excessive heat, nothing near dangerous levels, but I noticed that it tends to happen more when sat in traffic, low speeds, etc. Anyway, Friday evening, driving home from work, in traffic; Throws a wobbly, 5 Cylinders, etc... Turn heaters to max, after about 2 mins she's fine the entire way back... At a guess, insulators in the coil pack have had a harsh life and are giving up a little easier when the engine is hot. Although I can't locate the malfunctioning coilpack as of yet I'll report back to you gents as and when I manage to fix it. Thanks again for the advice gents. Beefy Quote Link to comment Share on other sites More sharing options...
350 Russ Posted November 12, 2016 Author Share Posted November 12, 2016 so today the zed passed its mot which is the first time I've driven it since the summer and all is fine now thankgod!! chuffed to have it back on the road finally. Quote Link to comment Share on other sites More sharing options...
Adam B Posted November 14, 2016 Share Posted November 14, 2016 (edited) What Rob332 said, if it runs on 5 again. Leave it run a while and then check your plugs. All should be revealed. Fresh MOT and out for a blast is good news. Edited November 14, 2016 by Adam B Quote Link to comment Share on other sites More sharing options...
Lewis_UK Posted November 14, 2016 Share Posted November 14, 2016 (edited) A few weeks back my zeds engine management light came on and the zed only running on 5 cylinders periodically. It would only happen briefly. I took it to Japex and they plugged it into their computer which gave the reading of a previous fault on a coil pack/spark plug. Fault was cleared and all good until now. The lights back on and she's running on 5 again but not all the time. Im thinking order a new set of coil packs and change them as the spark plugs are about 4 years and 10,000 miles old so should be ok? Never assume that, I recently had UpRev done @ Abbey and changed 10,000 mile spark plug just before the remap just because. When I had showed Mark, he said they looked OK, when I told him they had only done 10,000 miles the look on he's face was of disbelief. What Rob332 said, if it runs on 5 again. Leave it run a while and then check your plugs. All should be revealed. Fresh MOT and out for a blast is good news. TBH, I would not recommend running too long, otherwise it will cause bore wash, then you've gone from £100 jobbie to new engine. Edited November 14, 2016 by Lewis_UK Quote Link to comment Share on other sites More sharing options...
Kieran O'Quick Posted November 14, 2016 Share Posted November 14, 2016 At a guess, insulators in the coil pack have had a harsh life and are giving up a little easier when the engine is hot. Although I can't locate the malfunctioning coilpack as of yet I'll report back to you gents as and when I manage to fix it. Thanks again for the advice gents. Beefy If you want to identify the hot failing coil then get a can of freezer spray and keep it in the car. When you get the intermittent hot mis-fire you can jump out and spray the tops of the coils in turn. Honestly it's like magic. When you hit the bad coil the engine runs silkily - for a bit, till it heats up again and starts banging. Give it another spray, it goes all smooth again. There's your culprit. £6 fix. 1 Quote Link to comment Share on other sites More sharing options...
Kieran O'Quick Posted November 14, 2016 Share Posted November 14, 2016 Well, add on the price of a S/H coil so maybe £46. Quote Link to comment Share on other sites More sharing options...
Adam B Posted November 16, 2016 Share Posted November 16, 2016 Of course, by a while I meant a few cycles of engine at idle. Should of been more specific. Bore wash is no fun. Never heard of freezer spray? Sounds useful. Fitting bearings/shafts etc and overheating coilpacks Quote Link to comment Share on other sites More sharing options...
Kieran O'Quick Posted November 17, 2016 Share Posted November 17, 2016 Never heard of freezer spray? Sounds useful. Fitting bearings/shafts etc and overheating coilpacks ...and it's great for getting chewing gum out of carpets too. Quote Link to comment Share on other sites More sharing options...
Beefy Posted December 8, 2016 Share Posted December 8, 2016 Evening gents, Just a quick update, after finally getting frustrated with the intermittent 5 Cylinders and TCS light coming on, I decided to check the resistance between plenum and neg of battery (As some posts have mentioned in other forums) anyway, read at about 1.5 Ohms, nothing out of normal range... So just purchased some Splitfire coilpacks from RHDJapan, to see if it makes any difference (Buying a set of used CP's would trigger my autism). Will report back to you gents as and when. Quote Link to comment Share on other sites More sharing options...
Beefy Posted December 19, 2016 Share Posted December 19, 2016 Hello gents. So I managed to fix the problem. It's coil packs. I switched out for a set of split fires and now is running perfectly. Another quick fix I would recommend is if it happens during a long drive, heaters on max, footwell ideally as it's the least restrictive setting for heaters stopped the miss fire, I'm guessing an old coil pack (mine are on 92K now) getting too hot was the cause. Only done about 10 or so miles so far, but car feels a lot better and is pulling 20% more mpg... Kind regards, Beef Sent from my EVA-L09 using Tapatalk Quote Link to comment Share on other sites More sharing options...
xscotteex Posted December 19, 2016 Share Posted December 19, 2016 Did you ever determine the specific offending coil pack? Good to hear it's all mended now Quote Link to comment Share on other sites More sharing options...
modo Posted December 19, 2016 Share Posted December 19, 2016 Good news, you got it fixed. The coil packs are awkward things hey. Its times like this, you learn a lot more about the Zed. Quote Link to comment Share on other sites More sharing options...
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