147 misfire - Alfa Romeo Forum
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147 misfire

I've recently an 05 147 1.6ts and it's got a misfire on cylinder one I've replaced the plugs and coil packs I've swapped over the injectors and changed the lambda sensor and it's still misfiring on cylinder 1 anyone got any other ideas how to fix it?
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If you've check and swapped those items over (Try changing coil packs and sparks from cylinder 1 to 2) and check.

There's only so many thing's that cause misfire

1) Weak Spark
2) Weak Coil Pack (Should get worse as the engine warms)
3) Incorrect Mixture (Usually too weak a mixture)
4) Poor compression (Although this isn't too critical)
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Start with compression test to rule that out.

Read the codes and note them, some codes may be very old and irrelevant. Start the car and re-read the codes and work with those.

After that it is check the electrical plug connections and wiring to both coil pack and injectors.
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