cmwilliams1004 Posted March 15, 2016 Share Posted March 15, 2016 I have a 2005 LGT EJ257 swap and I recently had a check engine light come on for a cylinder 3 misfire. My first instinct was bad spark plug so I replaced them and that didn't help. Then I tried replacing the coil pack that didn't help either. After some research I found that it could potentially be a burnt valve since cylinder 3 is so close to the turbo. Im really hoping it isn't that. I was just wondering if anyone had some ideas on what could be the problem. Sent from my SM-G900V using Tapatalk Link to comment Share on other sites More sharing options...
Custom Trendz Inc. Posted March 15, 2016 Share Posted March 15, 2016 My cyl 1 misfire was burnt exhaust valve. Have you swapped injectors? Sometimes injectors get gummed up. I tried swapping plugs, coils, injectors, and then leakdown and compression test which showed bad exhaust valve. http://i2.photobucket.com/albums/y6/CustomTrendz4life/EJ255/20160226_170005.jpg Link to comment Share on other sites More sharing options...
Max Capacity Posted March 16, 2016 Share Posted March 16, 2016 Didn't you have the heads rebuilt when the ej257 was installed ? Or did you do a complete long block swap ? Like said above, swap injectors. 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...
cmwilliams1004 Posted March 16, 2016 Author Share Posted March 16, 2016 Didn't you have the heads rebuilt when the ej257 was installed ? Or did you do a complete long block swap ? Like said above, swap injectors. The 257 was brand new when it was installed. It has about 50,000 miles on it now. Sent from my SM-G900V using Tapatalk Link to comment Share on other sites More sharing options...
cmwilliams1004 Posted March 16, 2016 Author Share Posted March 16, 2016 My cyl 1 misfire was burnt exhaust valve. Have you swapped injectors? Sometimes injectors get gummed up. I tried swapping plugs, coils, injectors, and then leakdown and compression test which showed bad exhaust valve. http://i2.photobucket.com/albums/y6/CustomTrendz4life/EJ255/20160226_170005.jpg I haven't swapped injectors. That was my next step. Sent from my SM-G900V using Tapatalk Link to comment Share on other sites More sharing options...
Custom Trendz Inc. Posted March 17, 2016 Share Posted March 17, 2016 good luck! I just got mine running, has under 100 miles on the break in map so far Link to comment Share on other sites More sharing options...
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