Question about 1999 Nissan Maxima
Car still not remaining idling after i cleaned the mass air flow sensor
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Posted on Jan 02, 2017
well i know on the v6 that is true you replaced all of them. Not sure of 4 cyl but seems like it should be the same. Also I know on the v6 the variable valve timing set up sometimes did some weird failures triggering a cam sensor code. It could be anything from sludgy oil hanging up in the vvt hub or clogged passages or bad solenoids. but before going into all that(well besides maybe an oil change) I would go for the crank sensor.
Posted on Apr 07, 2009
SOURCE: mass air flow sensor
maf sensors identify the amount of air flow flowing in the intake. the sensor works with the throttle so it knows how much air is coming in to add the proper amount of fuel to mix with the air. Easy to pull and replace.
Posted on May 06, 2009
It has been my experience that this problem is usually caused by a dirty or bad Idle Air Control Valve (IACV). I would try removing the IACV and cleaning it thoroughly, as well as the air passages in the intake manifold.
You can check the valve itself. Check the resistance between the two terminals with an ohmmeter. The resistance should be approximately 10 ohms at 77°F. Also make sure the plunger moves in and out without sticking or binding and the spring is not broken.
OK now the bad news, the (IACV) is at the back of the engine and up against the fire wall. Lots of bad words will be used to replacing this and i think the dealer charges $550.00 in labour alone.
You can try running Sea Foam through the manifold, just follow the instructions and there will be lots of smoke, Do a search on You Tube for Sea Foam. You can try blasting it with throttle body cleaner though a vacuum tube and down the throttle body, may have to use three cans, just follow the instruction again.
Good luck and keep me posted.
Posted on May 27, 2009
I had a problem on my Nissan Xterra 2000. Symptons sound similar. In my case, it ran fine for a while and then suddenly the engine starts to stumble and lose output. At one point it did not even have enough HP to move. Irregular idling too. Thought it was water in my fuel. Bought water remover from the store and added to gas tank. Problem did not go away. Instead, "Service Engine Soon" light came on. Had to have it towed to the dealer as there was no way the engine could keep up with traffic. Dealer replaced the "Crank Position Sensor" today. Parts $33.00, Labor: $300 (about 3 hrs worth of work). Seems to work fine now but I will wait and see. Dealer also stated that Distributor bearing appears to be noisy and will need to be replaced sooner or later. I will wait for it to go before I fix that.
Posted on May 27, 2009
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