I have a 07 maxima sl with 149,000 miles. For a while my car will randomly stall at start up. It will kick over for a second, then engine knocks and stalls. Other times starts up fine. Had spark plugs changed 3 weeks ago. Brought to dealer twice and of course starts perfect. Check engine light says engine misfire. What can it be?

 

The cause is the msfire. U need to know why is your car misfiring. Do some diagnosis. The more u drive it with the misfire code the worse for your engine. My van was misfiring and would stall randomly it turned out that heads were damaged and there was something inside of the engine which turned out to be a hose clamp which could of cause the damage. Also the engine had low compression and one cylinder had none at all. So save your self the hassle of doing any further damage and get it checked before u have to spend 1000 or more to get a engine rebuild. Most importantly check your spark plugs and use only the NGK brand for spark plugs.

 

What code is it throwing? If it's a bad coil the code should tell you which coil is bad.

 

The dealership can't replicate the problem in having and te code just says engine misfire but not the cause

 

Do you have the P-number?

 

That's hardly comprehensible. What error code (number) precisely?

 

I will find out now, Im going to pick up my car and will ask what the code number is. Thank you all for your help.

 

Ok the code is P0300 multi cylinder misfire, but they cant pinpoint what causes it. they performed an isle air volume relearn.

 

Maybe they need to cheek the relevant connection grounds. The cam sensors could also be on their way out.