2000 Daewoo Lanos. I can only disconnect the quick connect side of fuel filter. The other side is a solid metal mushroom head looking connection, and I cant get it apart?

Change all the filters and sitting that long, I would check al the sensors. Take off the connections and spray them with WD 40. Check the feul line and the injectors. If it has a carburator, open the top of the carburator and clean out the jets. Make sure the float level is right. Good luck.

take a look on u tube put in make and model this may be helpful for you there some good videos .

I'm not real sure but you may need to cut through the line and use rubber fuel line and clamps. I understand it's very difficult. There is a special tool for this that doest really fit in the space. There's 4 metal fingers that hold the fitting together and need to be bent out to re ove the filter. Not easy! Good luck

It connects the crankshaft to the camshaft, which controls the valves that let the air fuel mix in and the exhaust out of the cylinders

Hello. As you know, this car was only made for six years by the Korean automaker. For some if not all of these cars the flasher is behind the instrument cluster. It is accessible through an access panel on the side of the dash by the driver's door. The flasher is most likely green on a violet block.
That said, in addition to the flasher being a possible culprit I would also suspect a relay, and a poor ground wire. Trace the ground wire from these lights to the frame of the car and make sure you have a good solid connection, with no corrosion. If the contact point is corroded relocate the ground screw and make sure that you have scraped and sanded the spot so you are contacting bare, clean metal.

check fuel filter and check fuel for water or contaminents
then check fuel pressure with gauge also while driving
may have pin hole in leads - spray water with salt solution over HT leads while engine running and then rev to see or here spark jump(missfire)
recheck spark plugs - did you crack any on installation/removal/installation?
what are the codes and description if stored?
what is engine live data parameters like do they look normal (right specs for range/operation)?

check throttle body and pcv hoses and ports for blockage possible carbon build up and sticky iac valve

You might be talking about a fuel line, quick disconnect connection. If so the tool looks like a mushroom with one side cut out. There are a few different styles out there and you can pick it up any part store. Just ask for a fuel line quick disconnect tool. When you insert the tool it will spread the three metal tabs so the lines can be seperated.

How hard is it to replace a fuel pump on a 2000 Daewoo Nubira and do you have to drop the tank?

the 2000 daewoo lanos 1.6L dohc head torque is as follows , step 1 = 18 ft. lbs. , step 2 = 70 degrees , step 3 = 70 degrees , step 4 = 30 degrees . sequence is as pictured .



there ya go , gears to the left , looking at the front of engine .