youngtryhard Posted December 8, 2018 Share Posted December 8, 2018 So I just had a new engine pulled from another legacy gt dropped in my car using the manifold that belongs to my car. The Car starts up right away but runs good for about 10 seconds than the car starts stumbling and check engine light starts blinking I pulled the codes says miss fire cylinder 1-4. When you rev the car and let go of the gas rpms drop all the way and it nearly stalls, if you rev it shakes real bad until about 3k rpm and cleans up like if the missfire were to disappear. I took some data logging if anyone wants to help me see what’s going on? Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
JmP6889928 Posted December 8, 2018 Share Posted December 8, 2018 Blinking CEL means multiple cylinder misfire. Did they put new plugs in the engine when they put it in? If so, find out if they were the correct plugs or not. Also check the plugs on the coils and make sure they are plugged in all the way and they are correct for each cylinder. Did they do timing belt when they put the engine in? If so, that could be an issue too. You said they used your intake manifold and injectors. Did you have an issue before on the other engine with cylinder misfires? It could be that you picked up some junk in your injectors. Just these to start and hopefully you'll find something easy to fix. Link to comment Share on other sites More sharing options...
youngtryhard Posted December 8, 2018 Author Share Posted December 8, 2018 I bought brand new ngk spark plugs for it they made sure the gap was correct, the engine that was put in my car is perfect I actually drove the car that the engine was pulled from for about a week and it ran perfectly no codes. They didn’t touch the timing other than make sure it was still on time. Only thing that was changed on the engine was that my coil packs that looked newer from my old engine were put on. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
JmP6889928 Posted December 8, 2018 Share Posted December 8, 2018 You're sure they (your coils) seated on the spark plugs correctly? Sometimes, they are difficult to get into place. You obviously changed something. Now you have to backtrack and find out what you changed. It sounds to me like the coils are the first place to start. Link to comment Share on other sites More sharing options...
youngtryhard Posted December 8, 2018 Author Share Posted December 8, 2018 You're sure they (your coils) seated on the spark plugs correctly? Sometimes, they are difficult to get into place. You obviously changed something. Now you have to backtrack and find out what you changed. It sounds to me like the coils are the first place to start. I’m gonna start with the coils Tomorrow, but does each coil have to be in the exact cylinder it was made for? Link to comment Share on other sites More sharing options...
rhino6303 Posted December 8, 2018 Share Posted December 8, 2018 Double check that the correct wires are plugged into the correct coils. White plugs in the front and black plugs in the back. Link to comment Share on other sites More sharing options...
Max Capacity Posted December 9, 2018 Share Posted December 9, 2018 Re-seat the electrical connectors. 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...
awfulwaffle Posted December 9, 2018 Share Posted December 9, 2018 I’m gonna start with the coils Tomorrow, but does each coil have to be in the exact cylinder it was made for? To answer your question, no. The coils are not cylinder-specific. If you isolate your misfire to a particular cylinder, you can try swapping coils to see if it moves with them. Link to comment Share on other sites More sharing options...
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