Blackie Posted July 2, 2010 Share Posted July 2, 2010 I had a service on the N/a auto a few days ago, Gear oil, Engine oil and filter and plugs were changed. It turns out i had the wrong plugs with the wrong gaps in for the past year or so, Now the proper ones have been fitted when i boot it (To get the kick down) It misses three beats and then picks up, Its a missfire for deffinate. It was worse in the rain but it still continues in hot weather. I put some esso petrol in last night, never used it before, This couldent be anything to do with anything could it or am i just grabbing at straws? Quote Link to comment Share on other sites More sharing options...
Rob_Mitchell Posted July 2, 2010 Share Posted July 2, 2010 get the plugs out and inspect them mate. Quote Link to comment Share on other sites More sharing options...
Blackie Posted July 2, 2010 Author Share Posted July 2, 2010 get the plugs out and inspect them mate. Thats a pain in the bum, What do you think it could be? Quote Link to comment Share on other sites More sharing options...
Rob_Mitchell Posted July 2, 2010 Share Posted July 2, 2010 not sure it is this but double check the hose which runs behind the engine, as mine had a tiny pin hole recently and when running a slight spray of water was getting into the plug channels causing it to short. but if its just missing on kickdown it could be a faulty plug and its only causing a problem under load. Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted July 2, 2010 Share Posted July 2, 2010 Maybe that's why the plug gaps were changed originally? Resetting the ECU may help, especially if you're using a lower RON fuel. Quote Link to comment Share on other sites More sharing options...
Blackie Posted July 2, 2010 Author Share Posted July 2, 2010 (edited) not sure it is this but double check the hose which runs behind the engine, as mine had a tiny pin hole recently and when running a slight spray of water was getting into the plug channels causing it to short. but if its just missing on kickdown it could be a faulty plug and its only causing a problem under load. The weird thing is i just ran it right down with the esso petrol put my normal stuff in and after it got through to the engine its not missing at all. Is that even possible? Resetting the ECU may help, especially if you're using a lower RON fuel. Ahh just saw this, so it could be the esso petrol? lower ron than my normal stuff? Also, How would you reset the ECU? Edited July 2, 2010 by Blackie (see edit history) Quote Link to comment Share on other sites More sharing options...
Blackie Posted July 2, 2010 Author Share Posted July 2, 2010 Also, the little white clip that holds the leads apart is missing so the plug leads are touching, Could this be anything? Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted July 2, 2010 Share Posted July 2, 2010 Also, the little white clip that holds the leads apart is missing so the plug leads are touching, Could this be anything? I've never heard anything about cross firing in the time i've been on here (although I've never paid much attention to NA threads in tech ) PM sent Quote Link to comment Share on other sites More sharing options...
Gabriella Posted July 2, 2010 Share Posted July 2, 2010 ...wrong thread Quote Link to comment Share on other sites More sharing options...
Blackie Posted July 2, 2010 Author Share Posted July 2, 2010 Its not just kickdown now, It seems to vary and does it when it fancys it. Its only had the plugs changed and its a nightmare Quote Link to comment Share on other sites More sharing options...
Blackie Posted July 2, 2010 Author Share Posted July 2, 2010 I have had a missfire underload on my n/a. I have just checked my newly fitted plugs part number and the whole internet says they are for a mk3 Supra not a mk4, The code on the ones i have fitted is BCPR6EY, A tech item from this site says they should be BKR5ES-11, Is this likly to be the problem? Its only the plugs that were changed and now i have this missfire? Quote Link to comment Share on other sites More sharing options...
Scott Posted July 2, 2010 Share Posted July 2, 2010 Yep that does sound like the issue. Quote Link to comment Share on other sites More sharing options...
Homer Posted July 2, 2010 Share Posted July 2, 2010 Some info about the plugs you have: BCPR: Correct code for copper plugs on the supra 6: A little too cold for the NA, this is what the TT normally uses. I think a 5 is normal for an NA E: Correct thread pitch for the supra Y: means it's V-grooved So the issue might be that the plugs are just too cold a rating for the NA (which could cause a misfire) The Spark plug guide seems to miss copper plugs for the NA, not sure why as most NA's use them. The code for the coppers is BCPR5ES and gap them to 1.1mm Quote Link to comment Share on other sites More sharing options...
Blackie Posted July 2, 2010 Author Share Posted July 2, 2010 cheers chap, The code i got off Alex's FAQ on plugs was BKR5ES-11 for standard ngk plugs, These will be right wont they as i'm getting them (Or others) tomorrow or should i get the ones you mentioned? Quote Link to comment Share on other sites More sharing options...
Blackie Posted July 3, 2010 Author Share Posted July 3, 2010 It was the plugs, The wrong ones, Cheers for the help lads Quote Link to comment Share on other sites More sharing options...
barneybrendan Posted July 3, 2010 Share Posted July 3, 2010 It was the plugs, The wrong ones, Cheers for the help lads did you educate the garage that fitted them. Quote Link to comment Share on other sites More sharing options...
Blackie Posted July 3, 2010 Author Share Posted July 3, 2010 did you educate the garage that fitted them. would do Barnybus but its a mate, He does all our work after hours and we must of saved 100s between us. Will be getting my money back on them though Quote Link to comment Share on other sites More sharing options...
barneybrendan Posted July 3, 2010 Share Posted July 3, 2010 after hours means no comebacks though. i take it there are no more issues now then Quote Link to comment Share on other sites More sharing options...
Blackie Posted July 3, 2010 Author Share Posted July 3, 2010 after hours means no comebacks though. i take it there are no more issues now then No mate, Better than before Quote Link to comment Share on other sites More sharing options...
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