thereisnospoon Posted April 14, 2009 Share Posted April 14, 2009 Changing my plugs yesterday on my n/a after the inlet drama i started to chang them, i got 2 the last plug and it snapped off in the block, i had the everything but the threaded piece this was all very scary untill my father saved the day with a extractor tool , anyways since i've put the new plugs in it seems to of lost a bit of kick, the plugs i put in was from ebay autolite xp iridium, didnt look all that when i got them upto the set of denso i had years ago. i took out ngk non iridium.? thanks guys Link to comment Share on other sites More sharing options...
Al Massey Posted April 14, 2009 Share Posted April 14, 2009 Are they correctly gapped? Link to comment Share on other sites More sharing options...
thereisnospoon Posted April 14, 2009 Author Share Posted April 14, 2009 i assummed the gaps would be fine out of the box, so i left them? Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted April 14, 2009 Share Posted April 14, 2009 Dont gap iridium plugs Link to comment Share on other sites More sharing options...
thereisnospoon Posted April 14, 2009 Author Share Posted April 14, 2009 really why's that? Link to comment Share on other sites More sharing options...
Al Massey Posted April 14, 2009 Share Posted April 14, 2009 i assummed the gaps would be fine out of the box, so i left them? Yes but are the gaps the right for the supra? Link to comment Share on other sites More sharing options...
thereisnospoon Posted April 14, 2009 Author Share Posted April 14, 2009 well like i said i assummed they was??? Link to comment Share on other sites More sharing options...
Al Massey Posted April 14, 2009 Share Posted April 14, 2009 really why's that? Because you will damage them Have a read here http://www.mkivsupra.net/vbb/showthread.php?t=41927 Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted April 14, 2009 Share Posted April 14, 2009 really why's that? Your not supposed to gap any plug that has an iridium electrode, I think it's because the elctrode can be made a lot narrower with a iridium/platinum tip and therefore you risk damaging them. Link to comment Share on other sites More sharing options...
thereisnospoon Posted April 14, 2009 Author Share Posted April 14, 2009 ah well any suggestions why the car seems differant? Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted April 14, 2009 Share Posted April 14, 2009 Could be anything mate, bad plugs or a damaged ht lead. Try resetting your ecu and see it that makes a difference, it might be pulling timing on you for some reason. Link to comment Share on other sites More sharing options...
thereisnospoon Posted April 14, 2009 Author Share Posted April 14, 2009 ok was about 2 do that anyway thanks, i'll repost after a drive later Link to comment Share on other sites More sharing options...
RobSheffield Posted April 14, 2009 Share Posted April 14, 2009 Maybe its just cheap plugs, or plugs too cold or hot, or not tight enough, or placebo effect or any of these things Link to comment Share on other sites More sharing options...
Homer Posted April 14, 2009 Share Posted April 14, 2009 I'd go with Rob's suggestion here. Can you post the exact spec of the plug and the rating? They might just simply be the wrong ones for an NA. Link to comment Share on other sites More sharing options...
thereisnospoon Posted April 15, 2009 Author Share Posted April 15, 2009 well i've just gone onto the main website for these plugs and wrote in the car, and they've given me a differant part number to the ones i have in the car, the one i got are for the tt Link to comment Share on other sites More sharing options...
Havard Posted April 15, 2009 Share Posted April 15, 2009 well i've just gone onto the main website for these plugs and wrote in the car, and they've given me a differant part number to the ones i have in the car, the one i got are for the tt Oops, did I hear a toilet flush...?? Link to comment Share on other sites More sharing options...
thereisnospoon Posted April 15, 2009 Author Share Posted April 15, 2009 well thats ebay 4 ya Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted April 15, 2009 Share Posted April 15, 2009 Why didn't you go for normal copper plugs? Can't beat them for price:) Link to comment Share on other sites More sharing options...
thereisnospoon Posted April 15, 2009 Author Share Posted April 15, 2009 wish i did now, also there's a flat spot when i put my foot down it takes a while for it 2 really kick in, this was like thos before the plug problems? Link to comment Share on other sites More sharing options...
thereisnospoon Posted April 15, 2009 Author Share Posted April 15, 2009 Could it be the butterfly valve in the inlet, because the sound changes alot when booting it?? Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted April 15, 2009 Share Posted April 15, 2009 Could it be the butterfly valve in the inlet, because the sound changes alot when booting it?? It might be. I had a similar problem in my prelude which has a similar intake design to the na supra(two sets of runners, long for low rpm and short for high) and it turned out that a vacuum solenoid was causing the diaphram that operated the butterfly valve to not operate. That meant I was on the short runners all the time with less torque low down. Link to comment Share on other sites More sharing options...
thereisnospoon Posted April 15, 2009 Author Share Posted April 15, 2009 well i was just out opening and closing it by hand and there was a whoosing sound, where does the pipes lead? Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted April 15, 2009 Share Posted April 15, 2009 well i was just out opening and closing it by hand and there was a whoosing sound, where does the pipes lead? They all lead to your intake. When your car gets to about 4k you should here a change in induction noise as the butterfly valve opens another set of intake runners. If your butterfly valve is not working you make be stuck with the runners open which will mean your engine feels lethargic at low rpm's as their is not enough velocity in the intake to promote proper cylinder filling ( I think:blink:) So I would go check and see if your problem happens at all rpms or just at different points. It was quite a common problem on preludes but I don't see it mentioned on here very often. You could also lift the bonnet and rev the engine and see if you can actually see the lever on the butterly valve operate. Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 15, 2009 Share Posted April 15, 2009 Just go and buy the right plugs, you have had one drama / near miss....... Link to comment Share on other sites More sharing options...
thereisnospoon Posted April 15, 2009 Author Share Posted April 15, 2009 yes it is opening i just checked by watching it, the power seems 2 of been lost now at higher rpms and 3rd gear just feels rubbish??? Link to comment Share on other sites More sharing options...
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