I'm in Florida I have a 2002 Buick rendezvous after changing the coil packs it's still misfiring. What am I missing?

0202 is injector on cylinder 2 , 0302 is misfire on cylinder 2.
Why did you change plugs, coil pack, wires, 02sensor when there is probably no/intermittant signal feeding injector 2.
Check for signal on the injector. If non, work backwards towards the ECU.

Disconnect coil connector - remove screws to cylinder head - pull up to disconnect from spark plug - reverse procedure to install new coils. Existing coils cn be tested by swapping coil with known good coil. https://www.6ya.com/callphilipforhelp

# 8 cylinder??? This is a 6 cyl vehicle

What is litre size of engine? If this is a six cylinder, there is no number 8 cylinder.

Since you changed parts, you have covered some possibilities. On the spark side, the Crankshaft sensor and( if equipped) the camshaft sensors give the information for the firing Pulse.

A wet connection on either part can certainly cause a misfire. There is also the possibility of a fuel injector misfiring due to a connection or bad ground on the injector during damp weather.

Sometimes if you get lucky you can see spark jumping on the motor by operating the engine in the dark. Mist the engine with a spray bottle of water to see if you can induce a misfire, if unsuccessful with normal weather conditions.

WD 40 often cures moisture problems.

Please rate my info.

Bad coil pack on number 2 cylinder.

Do you have a code for a misfire?

If a crank sensor goes bad the vehicle will typically not start at all.

If you have spark to all the cylinders than the next step is to either check compression or check the injectors. Usually the injectors will stick when this happens they will ohm out fine but will not spray fuel. To check them you will need either a high end scan tool or and injector tester and an fuel pressure gauge. The tester is connected to the injectors one at a time using the bulk connector near the alternator. The injector is then triggered by the tester as you watch for a drop in fuel pressure. Whichever injector does not drop fuel pressure when triggered is the bad injector.



I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

did you replace only one spark plug? that can cause issues because of differences in resistances between cylinders. also, did the map code stay off after replacing
?

a lifter or valve would not cause a misfire. look at the wires and plug again

The firing order is 1-6-5-4-3-2  the engine from the passenger side to the drivers side, radiator side 1-3-5 and on the fire wall side 2-4-6
The 3 coil from the radiator to the fire wall. #1 coil 1-4 #2 coil 5-2 and coil #3 3-6 Good luck and keep me posted, be glad to help. Its harder to explain then show, hope i made sense.