wilkorangerover Posted February 2, 2008 Share Posted February 2, 2008 i have a supra twin turbo and ever since BPU, (walbro pump, decats, restrictor ring , 1.2 bar, hks FCD,idium - BKR6EIX plugs ) it runs fine until under big load ( booted when cruising ) It seems to judder unless you ease of slightly to about 1 bar , i tried changing plugs to NGK - BKR7E but ive just been out tonight and it seems to be doing it again, ps when i swapped plugs they were black Quote Link to comment Share on other sites More sharing options...
Ric Posted February 2, 2008 Share Posted February 2, 2008 did you Gap them correctly? and are the coil pack plugs naffed? Quote Link to comment Share on other sites More sharing options...
Homer Posted February 2, 2008 Share Posted February 2, 2008 Do you happen to have an afr gauge installed? Quote Link to comment Share on other sites More sharing options...
wilkorangerover Posted February 2, 2008 Author Share Posted February 2, 2008 i gapped the plugs to 0.7-0.8, coil packs -, they must be ok as it runs fine rest of time Quote Link to comment Share on other sites More sharing options...
wilkorangerover Posted February 3, 2008 Author Share Posted February 3, 2008 how do you know if you have a faulty fcd? Quote Link to comment Share on other sites More sharing options...
jamesmark Posted February 3, 2008 Share Posted February 3, 2008 Whats it doing? Quote Link to comment Share on other sites More sharing options...
wilkorangerover Posted February 3, 2008 Author Share Posted February 3, 2008 i have problems when car underload (over 1.0 bar Quote Link to comment Share on other sites More sharing options...
jamesmark Posted February 3, 2008 Share Posted February 3, 2008 What is overload when it is at home? do you mean you are hitting fuel cut over 1 bar? What FCD did you go for? Quote Link to comment Share on other sites More sharing options...
wilkorangerover Posted February 3, 2008 Author Share Posted February 3, 2008 hks fcd, when at 1.2 bar the car seems to judder slightly, unless i ease to to about 1.0 bar Quote Link to comment Share on other sites More sharing options...
wilkorangerover Posted February 3, 2008 Author Share Posted February 3, 2008 could it be the hks fcd? it cant be the plugs as there new, so coil packs / fcd?? Quote Link to comment Share on other sites More sharing options...
wilkorangerover Posted February 3, 2008 Author Share Posted February 3, 2008 just been out today and it ran fine, i wonder if the freezing cold weather last night had anything to do with it Quote Link to comment Share on other sites More sharing options...
miko_supra Posted February 3, 2008 Share Posted February 3, 2008 my car did this once a few weeks back. i checked all my vacuum hose (all ok) drove it the next day and it was fine. still been ok sinse Quote Link to comment Share on other sites More sharing options...
wilkorangerover Posted February 3, 2008 Author Share Posted February 3, 2008 wonder if theres a bad connection somewhere maybe on the coil packs lol Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted February 3, 2008 Share Posted February 3, 2008 Remove the FCD and run it like that for a few days, if it clears up you know what to do Quote Link to comment Share on other sites More sharing options...
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