Question about 2001 Daewoo Lanos

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Random misfire,1.6L ,ecm, changed coilpack, new plug wires,

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Try low end plugs like

Autolite 3923
Autolite Ignition Spark Plug: Copper Core; Price Is Per Spark Plug Spark Plug - Resistor Type: Oe Style; Gap .044
NGK Spark Plug: Plug No. BKR6E-11 V-Power Spark Plug: Gap @ .044
Adjust the gap to 0.44

Top off coolant tank and start monitor or the next few days.
If you are losing coolant then it can be the 1st sign of blowing head gasket.
Do a pressure test if the temp is getting higher and losing coolant.

Old worn out O2 sensor will not provide the right data to the ECU.

I'm leaving the tough on to the later here.

Vacuum leak on air intake tube / lines / and valve cover are VERY tough

If it's over 4 years old then change it. It will help you save on gas mileage.
Take your time and check one spot at a time.

Random misfire is not a easy fix.


Posted on Jul 17, 2009

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