i was looking online for guide but theres none to be found, since I 30 is mechanically close to maxima i was thinking of getting the maxima haynes manual since i could not find one for the I 30 99.

 

I have the Haynes manual for the Maxima and have found it right on in every situation where I needed it. That said, I later bought the field service manual for the Infiniti on CD. It was on eBay, and it has much more detail. You might try to find one yourself.

 

The Haynes/chiltons for the Maxima are the same as for the I30, since those deal only with mechanical aspects of the car. Other than a VLSD tranny rebuild, the componentry wil be the same.