spidermonkey Posted September 21, 2013 Share Posted September 21, 2013 I have a 94 tt6 j spec that seems to have developed a misfire under boost, the car has an evc5 boost controller, hks exhaust and second cat replacement, walbro pump denso ik 27(I think) plugs and apexi air filter. The boost controller is set to 1.15 bar and seems to splutter on the second turbo, any idea's? Link to comment Share on other sites More sharing options...
tooquicktostop Posted September 21, 2013 Share Posted September 21, 2013 Do you still have the first CAT in? Link to comment Share on other sites More sharing options...
tony tt Posted September 21, 2013 Share Posted September 21, 2013 Mine does it when it's under a 1/4 tank if fuel. Above that level it seems to be fine. How much fuel is in it? Mine has no issues till the fuel gets to a certain point. I replaced plugs and coil packs also only to find out it was a fuelling issue. Link to comment Share on other sites More sharing options...
mellonman Posted September 21, 2013 Share Posted September 21, 2013 Maybe get a afr gauge that might be able to help know if you are running lean / detting Link to comment Share on other sites More sharing options...
Nic Posted September 22, 2013 Share Posted September 22, 2013 I have a 94 tt6 j spec that seems to have developed a misfire under boost, the car has an evc5 boost controller, hks exhaust and second cat replacement, walbro pump denso ik 27(I think) plugs and apexi air filter. The boost controller is set to 1.15 bar and seems to splutter on the second turbo, any idea's? Have the coil pack clips been renewed? Also check plug type, you want IK24 at BPU power levels. Link to comment Share on other sites More sharing options...
spidermonkey Posted September 23, 2013 Author Share Posted September 23, 2013 Yes 1st cat still in place, it's been running like this for quite a few years Link to comment Share on other sites More sharing options...
spidermonkey Posted September 23, 2013 Author Share Posted September 23, 2013 Have the coil pack clips been renewed? Also check plug type, you want IK24 at BPU power levels. No I haven't changed the clips, it may well havE IK24 in there, I have a spare set somewhere so I'll check:) Link to comment Share on other sites More sharing options...
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