1998 Nissan Maxima starting

Hi porthos1,

Thank you for the donation.

This seems to be an idling or misfiring problem.

Is the Check Engine Light showing?

Does the engine stall while cruising?

Does the engine run with lack of poswer?

The other 2 questions were not answered so I am assuming that they are no as well.

The idling speed is most likely too low and the usual cause is a dirty throttle body and Idle Air Control (IAC) valve. Get them cleaned and retest.

If you do not have the Check Engine Light light indicating, it is possible to clean the throttle body and IAC. Get a can of carb cleaner, ( this cleaner is applicable for both carb or injection component cleaning).

Did you try adjusting the idling speed? Here is a diagram of the idle adjust screw location. Turning it counter clockwise would get the idling speed higher. If idling speed is slow to increase, you might need to clean the internal port of the passage as dirt restriction would reduce the air gong through to maintain proper idling.

Remove the air intake hose and spray some carb cleaner into the internal passage and let it soak for a few minutes. Use a piece of rag to scrub the internal port with the throttle plate fully opened.

Remove the IACV-AAC and clean the internal parts with the carb cleaner.

The Fast Idle Control Device ( FICD ) solenoids located at rear left of of engine compartment should be cleaned as well.

After installation of components, initial starting of engine might take longer due to the additional presence of the carb cleaner causing a richer than normal condition. It would be ok after that.

Remember to adjust the idling speed only after the engine has warmed up.