I drove pretty fast on the highway on friday.Turned off the car and left for 2 days. I come back, start it up, and it's shaking. The shaking is violent, but the idle is absolutely stable. I try driving it in 1st-5th...each one has violent shaking below 2500 rpms. I pulled codes

Intake Air Temp Sensor 0401
Multiple Cylinder Misfire 0701

I figured it would be MAF sensor..but that's a different code. Anyone have any ideas?

 

Sounds like a coil(s) could be on its way out. Have you replaced the coils yet on your car?

 

I wasn't aware that coils go bad on the 98's..I only have 114k

 

could a spark plug have died? I know it's almost time to do those too..

 

if its a multiple misfire, its time to troubleshoot.
1. change spark plugs
2. check each coilpack
3. check each injector

btw, it doesnt matter what year maxima. coils will go bad.

 

So I should ignore the Air temp sensor because it's probably the coil/sparks? (Those I would troubleshoot how? Just buy new ones?) How would I check coil packs? Injectors..

 

The IATS reading doesn't even affect performance, it's just for diagnostics. I'd take everyone else's advice and troubleshoot the plugs, coils, and injectors.

 

first i'd suggest changing the spark plugs anyways and also use fuel injector cleaner for a couple tanks to see if that will clear anything up. if that doesnt do anything, i would get a multimeter and check each one (coilpack and injector) to see if it's putting out the same amount of resistance. for the 3 rear injectors, removal of the intake manifold needs to be done.

good luck! i know i had fun when i was misfiring...

 

Yeah my dad had the plugs and injectors replaced before he fixed his misfire. If I were you I would start by....

1. Change the plugs
2. Test each coil (if bad change)
3. Change injectors

On my dad's Solara, it cost him 2500 at a shop to diagnose and fix the car, so if you fix it with the plugs or even the coils call yourself lucky. Injectors are about $350 per injector plus labor.

 

can I do a lot of damage to the car if I continue to drive it like this for 60 miles? I have no way of getting to a place and the car just won't get fixed in time..

 

If it doesn't misfire when above 2500 rpms...just keep it above 2500 rpms on your trip and you should be alright. As long as the engine isnt misfiring for the 60 miles, you should be alright.

 

damn $350 for one injector? plus labor? ouch.
injectors usually go for about $160/ea and coilpacks go for about $100/ea from Nissan. Labor for the removal of the manifold to access the rear injectors and install them should be about $2-$300. not to mention a small fee in parts to replace the gasket which is about $15-$30.
as for driving around for an extended amount of time, I've done it (a couple thousand miles ), but i'd highly recommend getting it fixed as soon as possible to prevent further damage.

 

Has anyone thought about getting coil packs from a junk yard? How much do they usually go for over there?

 

Feel free to call my celll, I'm about 45 minutes south of Boston and would be willing to make a drive, 774-766-7462, I've got working fuel rails and coil-packs coming out my ***.

 

awesome, once I figure out what the culprit is Fri/Sat night I'll give you a call.

 

as a follow up, he determined it was a bad coil, and I sold him one. (hint hint.....feedback.....)

 

Yup, thanks for the coil, good price and driving same day to drop it off!
Is there anywhere else I need to write that??