Question about 1998 Nissan Frontier
How and where do you adjust the idle speed on a 1998 nissan frontier that is idling at about 3000 rpm and has a standard transmission
Posted by Anonymous on
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Posted on Jan 02, 2017
The idle speed is computer controled, it is not adjustable, you most likely have sludge in the throttle valve and the idle speed control air bypass valve, clean them with carb spray with the engine running.
Posted on Sep 17, 2008
Check for vaccume leaks and also you PCV valve. check the hose too. Visually inspect every vaccume hose you can find. Sounds like a leak .
Posted on Nov 10, 2008
Got the same make/model/year, but haven't had that problem. Does your temperature gauge run at half or above when this happens? If so, start with a cheap fix - new thermostat.
Another thing to consider is that some of the QR25DE engines equipped in the 02 Sentra SERs has an active recall on the crank position sensor. This fault would cause the check engine light to come on and the car would stall unexpectedly. It should start back up but the frequency of this will only increase without repair.
Also, no need to change plug wires, you have coil pack ignition - there is no distributor. If a coil pack is bad, you will have constant misfire and SES light.
Posted on Sep 29, 2009
The adjustment screws/nuts should be located either on the top of the headlamp assembly,
behind the headlamp assembly, or near the frame rail by the radiator
If you have one adjustment screw, it will control your vertical aim. If you have two adjustment screws, one will control your vertical aim and the other will control your horizontal aim
Park your car on a level ground 30 feet from a wall and measure the height from the ground to the bulb and mark on a wall (do this for highs beams and low beams if the bulbs are separate, if highs and lows are the same bulb, only do it for the lows)
If the headlights read VOR, then aim the brightest part or cutoff part just below the mark on the wall. If it says VOL or nothing, aim them 2 inches below the mark on the wall.
Posted on Sep 30, 2009
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Engine stalls cold or RPM
fluctuates at idle up and down or dies near idle.
This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 fault code as well as the cleaning procedure. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control. If the above cleaning doesn't cure your issues you need to have the computer controlled automatic idle speed control system diagnosed and repaired by a dealer or electronic engine control repair shop.
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