Question about 1985 Nissan Sentra 2 Door

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A 1985 Sentra - The engine idles until warm then it dies.

A 1985 Sentra - The engine idles until it gets warm, then it shuts down unless you keep the throttle pushed a small amount. I noticed that the IAC works until the engine starts to cut out, and then retracts, letting the engine die.

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Has it got a idle control valve, have tried adusting throttle cable slightly

Posted on Oct 05, 2009

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1985 Ford Ranger 2.3 starts and idles good. But when put in gear dies until it reaches full temp.


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Probably carb? Automatic choke not working? Remove air filter and spray carb with cleaner, Make sure all parts move freely. With engine cold, check automatic choke position. Start and check function as it warms up.

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Here are the more common cause of surges, stalls at stops, slow idle speed, erratic idle, it is in most cases the idle speed control air-bypass valve and/or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving

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Sputters and dies on cold start, significant drop in gas mileage.


You need to rebuild the carburetor or clean the choke linkage and make sure the choke valve closes cold.

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My 1997 nissan sentra dies at idle and then cranks but wont start unless let sit about 10 minutes only with engine warm worse on a hot day,


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2002 Jeep Liberty - 3.7 Liter - Engine has begun to die when rpm is at or near idle. Such as pulling into a parking place or stopped at traffic light. More frequent after engine has warmed. Once engine...


I would start with cleaning the throttle bore and plate. Then clean the Idle Air Control valve, IAC, as this is the device that controls idle speed. Use a can of spray carb cleaner and an old toothbrush. Trouble with the IAC would make sense if you can keep the engine going by holding down the gas pedal a bit.
Use the carb cleaner to check for vacuum leaks at hose connections and elbows. run engine and spray short bursts at hoses and listen for idle speed changes.
And lastly if problem is still there check MAP sensor.

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1 Answer

1985 Nissan Sentra Hatchback Manual Idle Speed Is Much Too High


If you contaminated the throttle cable with lubricant, you HAVE to REPLACE IT. They are dry on purpose - so they do not collect and cake up with crud. This WILL cause it to bind, usually at partial or full throttle and then where will you be? ;) Get that fixed and then consider this:

If it is a carburetor engine (non fuel injection) likely cleaning the throttle linkages, springs and plates with carb and choke cleaner from a spray can will get the parts clean and loosened up. Some of those designs incorporated a weighted cam/ratchet to set idle speed when the engine is cold. As the engine warms, this cam/ratchet uses gravity and bimetal spring to fall back and allow the throttle plates to rest at normal, low, warm idle speeds. Crud, light rust, dry parts will prevent this from operating properly. I once serviced a Dodge B250 van for this very problem because *mud dobber wasps* decided to build a nest in the throttle linkages!

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Car warms up then will not start again until the car cools down. It has a new starter, new battery. but it has this aftermarket alarm & remote start that was a problem, wondering if I should rip out...


I'm not sure. But I know some remote starter only run for awhile the shut down.. It also could be the distributor module. When it gets warm it shuts down your engine.. I hoped this helped a little.

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Idle flatutes


The throttle valve and idle speed control valve may be sludged up, clean them and retest the problem. Buy a can of spray carb cleaner, spray it through the intake until about half the can is used up with the engine running, you will need to hold the idle up or engine will die, disconnect the battery for 5 minutes then reconnect.

Aug 25, 2008 | 2001 Nissan Sentra

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