leggyman17 Posted October 6, 2012 Share Posted October 6, 2012 Just got my engine totally rebuilt. Installed it last night and i have a constant misfire in cylinders 1 and 3 (right side bank) Checked coils, not the problem. Spark plugs are new ( NGK iriduim 1 step colder) gapped to .030. coils are getting spark and injectors are getting signals (checked with noid light) Is it normal for a rebuilt engine to misfire ? only ran it for about 20 minutes.. help! Link to comment Share on other sites More sharing options...
Max Capacity Posted October 6, 2012 Share Posted October 6, 2012 No it's not normal. Can you swap plugs and see if the misfire moves. I can't remember what I gaped my plugs at. But I don't think it was that small. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
leggyman17 Posted October 6, 2012 Author Share Posted October 6, 2012 didnt swap the plugs...their new so its not like their fouled out or anything Link to comment Share on other sites More sharing options...
ehsnils Posted October 6, 2012 Share Posted October 6, 2012 It's not normal, and the first thing I would check is that the cam timing is correct since that's a common part for those cylinders. And do a compression test to verify that nothing is wrong. Other causes may be the manifold gaskets on that side and fuel feed. Also check that the TGV:s works as they should (if you have them). Link to comment Share on other sites More sharing options...
leggyman17 Posted October 6, 2012 Author Share Posted October 6, 2012 timing looks ok (all the marks line up accordingly wouldnt i have a TGV fault if they werent working? Link to comment Share on other sites More sharing options...
Max Capacity Posted October 6, 2012 Share Posted October 6, 2012 I think he's saying you may have a leak in one of the gaskets or seals. But that would present its self as a vacuum leak, right ? 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
leggyman17 Posted October 6, 2012 Author Share Posted October 6, 2012 i dont think theirs a vacuum leak... while its running i sprayed brake cleaner over all the joints (intake manifold, TGV's TBhose, vacuum lines ,etc) and no noticable difference in RPM Link to comment Share on other sites More sharing options...
leggyman17 Posted October 6, 2012 Author Share Posted October 6, 2012 also im on my EFI logics map tune wise...should i go back to the stock map or does that make a difference? Link to comment Share on other sites More sharing options...
Max Capacity Posted October 6, 2012 Share Posted October 6, 2012 It has to be something simple. Make sure all connectors are installed tightly. Step back, deep breath, get a bite to eat, look everything over. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
leggyman17 Posted October 6, 2012 Author Share Posted October 6, 2012 thats what i keep saying lol i left the car. il do something about it tomarrow just trying to go over everything in my head. idk what it could be Link to comment Share on other sites More sharing options...
Max Capacity Posted October 6, 2012 Share Posted October 6, 2012 headed out for the evening my self. Good Luck 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
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