Random cylinder misfire and smells like gas - 2000 Daewoo Lanos

the fuel smell is from unburnt fuel in the cylinders not firing , i'd have to start with reading the OBD codes to help narrow down the component/s at fault but at a guess i'd think the ign coils are at fault but the OBD will pinpoint the issue

Cylinder misfires-real bad ones,not random misfires

You have a Class A misfire- that is ruining the exhaust
converter,thus the sulphur dioxide smell,STOP Using it

You will need new spark plugs,find out what ignition coils
are bad & may have to replace the converters & oxygen sensors,
if you have used it like that a couple weeks

Your looking at $1000 repair bill or more, because you failed to
have it checked for codes,road tested with a scanner & look at
fuel trim & cylinder misfires

these random misfires could be the result of bad coils and when they get hot these misbehave

try to change the rotor and the distributor cap and the high tension wire.

I would take it back and demand a refund. Could be the crank or cam sensors, an intake leak, faulty coil, or a list of other components.

P300 is random multiple misfire,301 is cylinder 1 misfire. 302 is cylinder 2 misfire & 306 is cylinder 6 misfire. P161 is a bad heater circuit in oxygen sensor bank 2 sensor 2. It is behind catalytic convertor. I would replace downstream oxygen sensor & clear codes. Run vehicle it may be all that is wrong.

first off you have to fix the misfire problem before you can do anything else,as a misfire will cause a fuel smell because you have 2 cylinders acting like a raw fuel pump ,by the fuel entering the cylinder not burning a being pumped out unburned.so you have to find out why it is your six cylinder car is only running on 4 cylinders and repair the problem.then you can go from there if you have to,also you will have to change the oil as it will have fuel in the oil which thins out the oil to a point it does not do it`s job and could ignite in the oil pan causing other problems

P0301 - Cylinder 1 Misfire Detected.

Possible Causes:
- Improper spark plug at cylinder #1
- Insufficient compression at cylinder #1
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #1
- Fuel injector #1 may be faulty
- Intake air leak at cylinder

Possible Solutions:
- Perform Injector Service
- Replaced Spark Plug #1
- Replaced Injector #1
- Replaced Ignition Coil #1

Being you have a heavy gas smell I would look into the injectors. If injector #1 is over producing it can cause a misfire. Test your compression and fuel pressure.

P0401 Exhaust Gas Recirculation Insufficient Flow Detected

P0300 Random/Multiple Cylinder Misfire Detected
P0301 Cylinder 1 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P0305 Cylinder 5 Misfire Detected


I would check out the EGR valve. That maybe what is causing all the misfires.

you are probably throwing code p0300 random misfire. it sounds like your ignition module which sits on the top of you engine it is silver with find and held in with 3 torx screws it controls 2 cylinders at a time so when it goes your car will be only running on 2 cylinders this can severely damage you catalytic converter. and a dealer won't cover it under the emissions warranty. the module costs around $100 so you might want to diagnose it.