I am having a problem with my 2.4l nissan frontier running rough, misfireing through the intake (broke cover) and all lights dimming when i go over 55 mph. i believe that it is a sensor of sorts... any suggestions?
previously, i had a hard time starting it, thought that it was moisture in cap... but ran smoothly for 2 days till this NEW problem began. are they interlinked?
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misfire, has many cause, i have 50 reason list. for get that. 1: bad engine compression, or other major engine issues. mech. 2:bad spark 3: bad fueling. (too much or too little)
it only takes a few tests to find which it is, and in that order. above assumes, 13.3 to 14.7v at the EFI system at all times running. and EGR is not leaking. what does engine light mean. are you saying the CEL , check (service) engine light glows running? if yes ? why not scan it and report all DTC codes present. P0300 is random misfire. and P0301 is #1 cyl misfire. as 2 examples.
Rough idle?Too soon,Nissan has camphase actuator,these actuator has a tendency to get plug up and creates a rough idle,You can service these actuator both intake and exhaust,with carburator cleaner or brake cleaner even gasoline,the goal is to uplug the port
if it runs rough only at idle with the AC on then it osunds like a the idle solenoid that causes the vehicle to idle up when the ac is on. if its during the entire RPM range then you might want to check your alternator or battery, perhaps one of them isn't supplying enough power to run the engine, lights and A/C
If you engine is a 2.4 liter it's on the passenger side center of the engine compartment, the hoses from the fuel filter conncts to the throttle assembly . You may have to remove the air filter housing to see it. It is a round canister hoses held on with fuel line clamps. hope this helps
knock sensor is located on the block usually under the intake. nissan has problems with these sensors. i have chaunged plenty of these on nissans in the past year. this has no affect on your gas mileage. this sensor picks up misfires on the engine. sometimes you might have rough idle and can't feel it in the drivers seat but the knock sensor can. i would suggest maybe a tune up spark plugs, air filter, fuel filter first before going to take apart a bunch of things to change a sensor. the sensor is designed to pick up any differences in motor quality and will throw the engine light on. sometimes the problem is the knock sensor, or there is an underlying cause that the knock sensor is reading.