jayl Posted November 19, 2010 Share Posted November 19, 2010 can anyone help i have just put a straight through exhaust on my car and hks induction kit but since i removed both cats car is not running right it seems like it lost a bit of power and when i put my foot down it struggles to pull away quick as if its running out of fuel . when driving slow its not so noticeable any ideas Quote Link to comment Share on other sites More sharing options...
ronttuk Posted November 19, 2010 Share Posted November 19, 2010 weather its a tt or n/a would be our 1st question i think Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted November 19, 2010 Share Posted November 19, 2010 weather its a tt or n/a would be our 1st question i think Quote Link to comment Share on other sites More sharing options...
Snooze Posted November 19, 2010 Share Posted November 19, 2010 I guess it's a TT Quote Link to comment Share on other sites More sharing options...
Matt H Posted November 19, 2010 Share Posted November 19, 2010 The guy's a troll. Quote Link to comment Share on other sites More sharing options...
Elmo Posted November 19, 2010 Share Posted November 19, 2010 (edited) I few weeks ago I put a 3" straight through catback S/S exhaust on my N/A and removed the 2nd cat, apart from it being incredibly loud, it lost a lot of acceleration and it became very thirsty, I put the 2nd cat back on which solved the noise, acceleration & fuel problems. Edited November 19, 2010 by Elmo (see edit history) Quote Link to comment Share on other sites More sharing options...
w41k3r Posted November 19, 2010 Share Posted November 19, 2010 im double decat and 3 inch exhaust on my n/a to be honest felt no difference Quote Link to comment Share on other sites More sharing options...
jayl Posted November 19, 2010 Author Share Posted November 19, 2010 its a auto tt Quote Link to comment Share on other sites More sharing options...
jayl Posted November 19, 2010 Author Share Posted November 19, 2010 i got a double decat pipe so cant put just one back i thought when you decat the twin turbo it should give more power which it may do but do i need a fcd and fuel pump upgrade first to sort this out ? Quote Link to comment Share on other sites More sharing options...
Kirk Posted November 19, 2010 Share Posted November 19, 2010 I few weeks ago I put a 3" straight through catback S/S exhaust on my N/A and removed the 2nd cat, apart from it being incredibly loud, it lost a lot of acceleration and it became very thirsty, I put the 2nd cat back on which solved the noise, acceleration & fuel problems. Ive got a second decat with a 3" cat back exhaust and if anything it feels better on accel Quote Link to comment Share on other sites More sharing options...
jayl Posted November 20, 2010 Author Share Posted November 20, 2010 this is a pain as when im driving and want to floor it i cant cause it seems to be stuttering about and then gradually goes but not as it should Quote Link to comment Share on other sites More sharing options...
Graham S Posted November 20, 2010 Share Posted November 20, 2010 Have you tried resetting the ECU? Do a quick search as to how to do it and that may help. Quote Link to comment Share on other sites More sharing options...
jayl Posted November 20, 2010 Author Share Posted November 20, 2010 cool looked that up ill try it cheers Quote Link to comment Share on other sites More sharing options...
Homer Posted November 20, 2010 Share Posted November 20, 2010 Read this: bpu You can't just decat a TT and expect it to run, the boost will run away without some control of the boost, it'll overboost and detonate even without an FCD fitted. You MUST: - Get a boost gauge - Get a restrictor ring - Fit an FCD - Fit a new fuel pump - Fit a colder grade plug - Check your intercooler is in top condition Quote Link to comment Share on other sites More sharing options...
jayl Posted November 20, 2010 Author Share Posted November 20, 2010 ok thanks what plugs do i need to get ? once i got all these parts can i fit them or does it need to be set up ? Quote Link to comment Share on other sites More sharing options...
jayl Posted November 20, 2010 Author Share Posted November 20, 2010 should i replace cats till i get this done ? Quote Link to comment Share on other sites More sharing options...
Nic Posted November 20, 2010 Share Posted November 20, 2010 should i replace cats till i get this done ? Yes put the cats back on until you have read the bpu thread and have everything Homer has listed. Quote Link to comment Share on other sites More sharing options...
dude Posted November 20, 2010 Share Posted November 20, 2010 When you get it right the difference will be pretty dramatic. Quote Link to comment Share on other sites More sharing options...
jayl Posted November 21, 2010 Author Share Posted November 21, 2010 cool thanks for your help guys really looking forward to getting this sorted now i know what it is and whats needed Quote Link to comment Share on other sites More sharing options...
Nic Posted November 21, 2010 Share Posted November 21, 2010 cool thanks for your help guys really looking forward to getting this sorted now i know what it is and whats needed It will make a big difference to response and power, but you need to do ALL the bpu modifications together. Quote Link to comment Share on other sites More sharing options...
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