94max

My 94 Maxima has a hesitation problem. When I acclerate after a stop sign or traffic light I see the needle on the Tachometer surge (go up and down) very little the rpm is around 1500 - 2500 I can provide the exact rpm details on a followup post on this site. This hesitation or surge does not happen or is not observed beyond this rpm range and when I am crusing at higer speeds. I do not feel the smooth accleration from start after a stop point. Any suggestions as to what that problem may be ? 123K miles on the car. Timing blt changed around 90K miles. Any help is appreciated. Thanks

MyGreenMax94

How long since your last tune up??

94max

Never had one done. Do you think that is the reason ? What is done during a tune up ?

MyGreenMax94

It is a good place to start...You probably need one anyway...

A basic tune up consists of new spark plugs/spark plug wires/distributor cap/rotor button...

A more complete tune up includes a new fuel filter/oxygen sensor......

94max

I changed the plugs, fuel filter, distributor wires at 100 K miles. When I first began to notice this problem. The car now has 123 K miles and this problem just bothers me.


Have not changed the O2 sensor or the distributor cap / rotor button.

Have not had an official tune up bya mechanic after the timing belt was changed by the dealership (around 90 K miles).


Could this problem relate to the Mass Flow Sensor or to sticking injectors ?

One more thing to add....If I do not use premium Octane(92/93) fuel this problem is very prominent. It almost goes away when I add a bottle of the Fuel SYstem cleaner to the tank. This may be just boosting the octane level of the fuel.