fparrish Posted October 4, 2006 Share Posted October 4, 2006 Basically my car has been misfiring horribly recently so i have had the plugs and leads done. I have had magnecore competitoon leads fitted and denso iridium plugs. I was hoping this would sort out the problem. Now the car is running nicely in low revs but when you put your foot down it seems to stick for a second at around 4000 rpm, where i lose all power. This is far more noticeable when you take the overdrive off. The car is a 1995 normally aspirated automatic. If anyone has any ideas as to what could be up can you please help?! Link to comment Share on other sites More sharing options...
wkdtime Posted October 4, 2006 Share Posted October 4, 2006 Dizzy cap and rotor arm checked? Look for oxidisation on the contacts inside the Dizzy cap and the condition of the rotor arm...i could be wrong as im not too sure about the ignition side of the NA Supra. Link to comment Share on other sites More sharing options...
fparrish Posted October 7, 2006 Author Share Posted October 7, 2006 Dizzy cap and rotor arm are apparently ok. Have been talking to someone who seems to think could be the inlet manifold? would that create such a problem? If it is say warped or not torqued up properly so as letting air in in another way?!!? Link to comment Share on other sites More sharing options...
fparrish Posted October 7, 2006 Author Share Posted October 7, 2006 thought it might be inlet manifold as with the na have to remove it to change the spark plugs etc..... Link to comment Share on other sites More sharing options...
bromy Posted October 7, 2006 Share Posted October 7, 2006 When you say 4000rpm, thats about when (4500rpm) the inlet manifold switches to short runners via a buterfly valve to produce more power, this operates via vacuum pressure so make sure it is connected properly Link to comment Share on other sites More sharing options...
Prof. Monkey Posted October 8, 2006 Share Posted October 8, 2006 thought it might be inlet manifold as with the na have to remove it to change the spark plugs etc..... Yeah my car had a misfire, after I changed the sparkies, so I bought a new manifold gasket (about £5) and that sorted the problem. Link to comment Share on other sites More sharing options...
fparrish Posted October 8, 2006 Author Share Posted October 8, 2006 Cheers guys, After fitting a new piece of samco shes running alot smoother which is good. so now need to get meself some more samco as the pipe i removed was not in good condition at all. Link to comment Share on other sites More sharing options...
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