Question about 2001 Daewoo Lanos

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Daewoo matiz SA- year 2001, india done 39000kms

Matiz had some missing problem, no1 spark plug got dark,n dirty, lost pickup after driving a while, some vibration, on ac does not run good, average was low...

i changed distributor, fuel injectors, fuel pump, spark plugs, filters, ht leads, valve idiling control, tps sensor

but the problems resurfaced again after driving 4000 kms....

now it has vibration on idle, specially on ac on... after driving 50 kms on ac sometimes it give jerks.... fuel average is down, exaust pipe is black as compared before... no water is given out as before...

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Check cylinder compressions wet and dry
any difference of about 25PSI is enough to warrant engine repairs
sounds like plug might be fouling up with oil
ring problem?

Posted on Jun 21, 2009


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