My wife's Sentra started running really rough Monday afternoon. I was driving it home and the Service Engine Soon light started flashing. I kept an eye on everything and didn't notice any problems right away, but once I pulled into my driveway, the car started shaking mildly and the idle seemed high and rough. I cranked it up today and it is still idling rough and at about 1500rpm, but once you give it some gas up to about 2000rpm, it smooths out. The car has about 85000 miles on it and as far as I know, has not had the spark plugs or wires changed out. I was thinking this might help, as well as going ahead and chaning out the fuel and air filter. Any other suggestions or anyone with previous problems like this? Thanks.
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Re: 2000 Nissan Sentra rough idle
A rough idle/high idle is indicative of a malfunctioning TPS(throttle position sensor) this is located on the throttle body ,is attached with (2) screws/bolts to the throttle body housing right off the butterfly shaft. it has either 2 wire or 4 wire plug. the replacement part can be purchased at locale auto parts store. I would also agree that a full service and tuneup be done. this will help with performance and will increase the fuel efficiency. please rate this...thanks
It could also be a coil on the top of one of the spark plugs,my wifes car did that also, we had the codes checked and it showed a mis-fire on #4 plug i changed the coil on #4 plug and that fixed the problem. i hope this helps
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it can be a number of things ---have vehicle scanned a blinking check engine usually means a misfire with 1 or more cylinders most auto stores offer this service for free --with misfire can be plugs -coils-wires-bad gas --throttle body fault--fuel delivery problem etc
Check engine light flashing means there is a bad misfire , it flashes to tell you your damaging your catalytic converter . You need to have it check , you don't won't to have to replace the catalytic converter . Can cost up to $1,000.00 . Flashing Check Engine Light CarMD
Sounds like you have a major misfire problem. The light is flashing because the ecm has determined that the problem is severe enough to cause damage to something. If your engine light flashes it is a warning not to drive the vehicle. I'm assuming this is a four cylinder. My guess would be that only two of the cylinders are actually producing any power. I would need the following details to help you further. How many miles are on this engine? Has the necessary factory maintenance schedule been maintained? In other words have the appropriate parts been changed and serviced to keep this engine performing properly. Many things could be causing your issues. Do the necessary maintenance first, like spark plugs and whatever the manufacturer requires and see what happens. If this does not help I can help you with the rest.
I had the same problem. It was the intake gasket, very common in this model. A $12.00 gasket - Nissan wanted $1000.00 to install it. I got it done for $327.00 - engine light still remains on but car drives just fine.
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.
well if the head gasket has been replaced you shouldnt smeel any coolant. But have you check your coolant hoses???? for leaks or any coolant on the driveway, when your car has been sitting there overnight!???