Just bought a 99 Maxima a few weeks ago, and decided to do a tune-up and some other maintance..I first used Bosch spark plugs and started getting a mis-fire...I found out that i was using the wrong plugs and changed them to the NGK G-Power Platinum BKR5EGP. But i am still getting a misfire....What should I do?

 

its ur ignition coil(s).. its a 99

 

Check the electrical connections, look closely at the pins, they bend easily.

 

start by finding out which cylinder is misfiring.

 

Look at the ignition coil or the fuel injector

 

Definitely ignition coils.

 

I had the same problem. Since you didn't have the problem with the old plugs, one of the new plugs is the problem.

Check the codes and find out which cylinder misfires, then take out that plug and inspect it (I found the ground electrode bent and had to regap it), then put the plug back in and try not to apply too much torque- it should be just snug, make sure the plug tip that contacts the coil is clean and has no oil on it, put the coil in and make sure the bolts are snug tightly (use a ratchet instead of a screw driver).

Let us know if it helps.