I have a95 nissan maxima it starts runs rough if flutter the gas to keep it running it wont go past 2500 rpms but if i just step on the gas it will die

Clean throtlle body,change air filter.

its your idyll. You need to turn up the gas flow to the fuel injection or the carburetor.

Are you sure what you found is the temperature sensor? It sounds like it could be a faulty camshaft position sensor. That would explain the erratic idle and rpm spike. Will aslo cause the engine to skip because of the irregular signal being sent back to the ecm.

Sounds like a problem with the fuel injector or the sensors for the unit. This probably needs computer analysis for rectification.

there might be a problem in your fuel line. try buying a can of sea foam [Red and white bottle.Available at any auto place. Around $9]. pouring about half in the tank and the other half thru a line in your brake booster or another vacuum line. the line will be under the hood to the very top right. it should be black, round, and two lines coming out of it. do this with the car running so maybe have someone else hold the gas to about 1500 RPM. Slowly drip the sea foam in until it almost dies then put your thumb on the line to keep it running. keep doing that until the can is almost or fully empty. Let the car sit for about 5 mionutes then start the car and keep the RPMs to about 2 grand. There will be smoke fromt the exhaust SO DONT WORRY! Just keep on the gas until the smokes clears. If that doesnt help let me know!

vaccuum is going to be the problem from the symptoms u describe,check all vaccuum lines,breather,

U CRACKED A SPARK PLUG??

Since RPM meter is also important so that you can control the engine from overspeed. It is also important to repair the thing your rpm cable maybe worn out already. If it is an electronic rpm meter cold Solder in electronic lead might be the cause.

CHECK THE FUEL PUMP PRESURE
ON THE FUEL RAIL AT THE INTAKE THERE SHOULD BE A PRESURE CHECK VALVE

i would change the knock sensor first. if that doesn't fix the problem then a complete tune up would be the next step. but if the sensor has no resistance that is where i would start