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Ep3 dreaded misfire help

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6
Hello all, can anyone help me please. Iv had a misfire on my ep3 for a few weeks now, keeps showing up misfire cylinder 4. Things I have done so far, checked compression all four cylinders fine, new plugs, new coils, swapped out no. 4 injector and put new timing chain on (was due anyway). The misfire seems to be worse on idle if anyone can help be much appreciated as I'm losing the will thanks
 
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Probably, worth checking though. Might be best to stick an obd2 on to see if you have a code.
 
Done the valve clearances today all didn't seem to bad. It seems to be OK when it's cold then started missing.. Code p0123 came up aswel but iv just fitted a new tps
 
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