My 2002 Grand Am 3.4 is misfiring on cylinders 2 & 3, Hesitates

Misfiring can be cause by ignition coil,spark plugs,wires,engine valve,cylinder compression,
if it's a quad four then crack around the ignition coil. there is 2 coils like 1-4 coil and 2-3 coil
first check spark plug color or foul of gaz
hope it help

How can you KEEP getting a dash light light,
when you check for codes the same day or
next day any light comes on & stays on after
the motor is running

Now you have cylinder misfires & probably
ruined the exhaust converter using it

DOES THIS VEHICLE USE COIL PACKS? MOST LIKELY (3.)....1 THAT FEEDS CYLINDERS 1&5 ....1 FOR 2&3 AND 1 FOR 4 AND 6......OR SOMETHING SIMILAR TO THAT. CHECK FOR A BAD COIL THAT FEEDS 4 & 6 TRACE PLUG WIRES TO INSURE THAT SAID COIL FEEDS #'S 4 & 6

P0301 Cylinder #1 misfire. First of all check Spark plug, plug wire, Compression in #1 cylinder and if all are fine then I would be looking at the fuel pump !

A misfire alarm typically means the coil pack mounted above the sparkplug indicated in the misfire had gone defective.

To test it, swap the coil pack with another cylinder, and see if the misfire goes from #2 to the cylinder you put it on.

If the misfire continues to be on #2, then consider changing the sparkplugs.

I hope this helps.

04jeeplibertypo305changedinj coil plug counters stayed high for #5 saw spikes on other cyls changed chk sensor no spikes on any misfire counter a week later back with a po 305 ?

This sounds like the coil for cylinders 2 & 4 is bad -- I'm assuming there is a coil pack which would have 3 coils for a 6 cyl engine and 4 coils for an 8-cyl dngine. Could be a bad electrical connection(s) to this coil as well.

Charlie

BROKEN VALVE SPRING WOULD BE MY GUESS.

Check spark plug wires for corrosion