jdmsaq Posted October 30, 2014 Share Posted October 30, 2014 Hi i recently installed 4-2-1 japspeed manifold and a custom decat.. My car looses power after 4.5k rpm the problem is it starts burbling and popping and becomes sluggish what can the problem be? Quote Link to comment Share on other sites More sharing options...
beastgtir Posted October 31, 2014 Share Posted October 31, 2014 Could be the 02/lambda sensor starting to fail due to extra stress out on it. Quote Link to comment Share on other sites More sharing options...
Jayhoath83 Posted October 31, 2014 Share Posted October 31, 2014 I had this wen i first got mine have you had the engine management light come on if yes then it could be the lambda but if the light is not on the dash then it could be ur dizzy or your fueling so check ur dizzy cap n rotor arm n fuel filter first as they are the cheap options Quote Link to comment Share on other sites More sharing options...
jdmsaq Posted October 31, 2014 Author Share Posted October 31, 2014 Could be the 02/lambda sensor starting to fail due to extra stress out on it. Ok mate will look into that Quote Link to comment Share on other sites More sharing options...
jdmsaq Posted October 31, 2014 Author Share Posted October 31, 2014 I had this wen i first got mine have you had the engine management light come on if yes then it could be the lambda but if the light is not on the dash then it could be ur dizzy or your fueling so check ur dizzy cap n rotor arm n fuel filter first as they are the cheap options Yes, when I had just my custom exhaust installed the engine management light came on .. What did you do to sort the issue mate? Fuel filter has been replaced 3k miles ago. I will look into my dizzy, lambda and rotor cap mate and will update if problem is sorted or not. Also the dude at exhaust place did a diagnostic test on my car and a few fuel error codes came up. He cleared them for me a couple of weeks ago and said come back and he will re check it for me by re-testing it.. Quote Link to comment Share on other sites More sharing options...
aerodeckvtis2000 Posted November 11, 2014 Share Posted November 11, 2014 check your oil , wont vtec if there aint enough in . Quote Link to comment Share on other sites More sharing options...
Krzys Posted November 13, 2014 Share Posted November 13, 2014 check your oil , wont vtec if there aint enough in .1.4 doesn't have VTEC anyway. 3 Quote Link to comment Share on other sites More sharing options...
vtec2011 Posted November 16, 2014 Share Posted November 16, 2014 It could well be lambda as stated but it could also be loosing a bit of back pressure. 4-2-1 manifold, straight through center pipe and straight through back-box on a little 1.4 is a bit much I think. But I could be wrong 1 Quote Link to comment Share on other sites More sharing options...
Jayhoath83 Posted November 16, 2014 Share Posted November 16, 2014 I put a new lambda on saqib but you could try cleaning yours first n see if that helps Quote Link to comment Share on other sites More sharing options...
Jayhoath83 Posted November 16, 2014 Share Posted November 16, 2014 Thats a good point actually tom, @jdmsaq have you checked your filter n throttle body Quote Link to comment Share on other sites More sharing options...
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