20 Most Recent 2002 Nissan Xterra - Page 9 Questions & Answers

unless your xterra is supercharged, you really do not need to replace it. its a lot of work, because its located way down under the upper plenum and lower intake. its way down there. if it is supercharged, you do need to replace it, because it puts the supercharger into fail safe mode and truck till not run to its full potencial.

You have distributor cap or coils.Fuel filter,vacuum leak.

I've had a crack in the head before on my last car use this head gasket repair worked a treat for me, money back gaurantee only reason i bought it

It may be your stop light switch,it is attached to your brake pedal,to remove,unplug electrical connector,get wrench and remove nut holding it on,to check ,push pedal in with hand and see if switch is engaing,here's a link on what it looks like.

check TPS sensor[RPM]

Could be your throttle position sensor,here's a link on how to test.Here's what it look's like.Here's a page to where there located,you didn't state your engine size but this will show all engines for your car.

Check condition of pump belt and check for correct tension. Have a pressure test done on the pump to ensure correct operation

Trouble Code: P0304

Cylinder 4 Misfire Detected

Possible Causes:Air leak in the intake manifold, or in the EGR or PCV system.Base engine mechanical fault that affects only Cylinder 4.Fuel delivery component fault that affects only Cylinder 4 (i.e., a contaminated, dirty or sticking fuel injector).Ignition system problem (coil or plug) that affects Cylinder 4.Trouble Code: P0505

Idle Air Control, Auxiliary Air Control Valve Circuit Malfunction

Possible Causes:IACV-AAC valve control circuit is open or shorted to ground.IACV-AAC valve control circuit is shorted to system power (B+).IACV-AAC valve is damaged or has failed.PCM is damaged or has failed.

have you had the alternator tested? how old is the battery? batteryies last 4 years . .can you drive it to a parts store. they can test the battery and alternator in the nissan, the alternator is a little hard to get to