01 Maxima Idle question and throttle cleaning questions...

[Taurus888]

Ok this is a 2 part-erI have recently replaced all coils and put in new spark plugs (NGK iridiums)when the car idles...usually in park...i can feel it stumbeling and i can feel the engine vibrations in the car. The rpms look solid on the gauge staying between 600-800. . ... . could this be a IAC issue?what else could be effecting this?...ive noticed this before my misfire mess..in which i did the coils.i was also thinking that this stumbeling could be an intermittent misfire that is not throwing a code...do these cars have problems with thier crank sensors?....(sometimes i get a hard start that almost seems like a sputtering start)

and also.....is it ok to use a throttle body cleaner?....at the shop we use this can u spray down the intake when the car is running and it burns out all the carbon.but i also read somewhere that maximas have a "special coating"in the intake and that im not supposed to use intake cleaning products.

---Dan

[maxhopper]

I would say that your idle problem is either related to the IAC or the EGR system (likely the line from the exhaust manifold is clogged).

I've used throttle body cleaner before with no adverse effects.