Question about 1993 Mercury Villager

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Idle drops Once in a while the engine idle drops too much when i take my foot off the gas causing the engine to stall while the vehicle is still in motion. I have already replaced the fuel filter and air filter in the past and those fuel additives don't help. Do you know what may be causing this problem which I have had since purchasing the vehicle 3 years ago?

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  • Anonymous Oct 20, 2008

    I have the same problem and have had a complete tuneup but it still occurs. Currently the garage is doing the diagnostice, he thought possibly the fuel injectors need a cleaning.

  • BIGG STIZZ Feb 16, 2009

    I HAVE THE SAME PROBLEM I RECENTLY PURCHASED A 1993 MERCURY VILLANGER FOR $1500. WHEN I COME TO A STOP THE IDLES DOWN AND SHUTS OFF. I ALREADY HAD MY 0/2 SENSOR REPLACED, FULL TUNE-UP AND STILL NOTHING. PLEASE ADVICE.

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Have you tried cleaning the throttle body? I've had the same problem with mine twice. As a mechanic, I can tell you that this is something that often gets overlooked by DIYers. There are 2 small vacuum ports at the bottom of the intake side of the throttle body, these can drastically affect idle & low rpm operation. Simply remove the intake boot from TB, spray generously wtih carb cleaner, allow to dry. Re-install boot (hose), and try again. If this doesn't solve your problem you only lose 10 min $5-6 and have a clean TB, but it will likely start easier & idle smoother at least.

Posted on Dec 18, 2008

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Periodically, EPS comes on Dashboard ,then steering becomes too hard, this will disappear two to three times re start the vehicle or running few meters and switch off the car and re start the car.


well I can't drive it and see all symptoms.
i can't see the idle speed drop below 800 RPM,. !
if the idle drops real low, then engine shakes, and PS gets weaker.
Id ignore the EPS till such time as all other things are perfect.
ever get an engine tuneup this decade?
low engine RPM , top number 1 cause is owners not servicing their cars. (spark plugs bad tops that list)
if you ignore that, tuneup the engine WILL misfire and RPM will drop and P/s (means power steering)will get weak (the assist is pump driven) and then the engine can stall.
i bet you also forgot to say the steering got weak
park or coming to a stop with foot off throttle.
do the head lights dim as this (bad) happens?
can you use your right foot to keep RPM above 800 and save stalls or near stalls?
IF RPM is ok, ?then check the fan belt next. (slips)
or buy a new on, my guess is 11 year old belt is kinda hopeless case.

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1 Answer

1989 will not idle, have to keep foot on the gas pedal


It,s either not getting enough gas or not enough air. Check has and air filters.

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these trucks are equipped with an idle speed control motor. What you're describing sounds like that part has stopped working. The part is designed to maintain idle when gas pedal is released. Now if you hear an audible hissing noise under the hood, then theres a vacuum leak which can cause the same problem, but it sounds like the idle control motor. Good luck.

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Car hiccups and stalls


Although your temperature gauge may show that it works, some models have a second temperature sensor for the engine management system.
That second sensor provides info which sets curb idle and timing advance. The "Cold start" feature is a part of this. The hic-cup is something of a bucking symptom as the engine controls toggle between hot and cold run settings repeatedly as water temperature is not stable.
In the past, I found several 1984 engines having defective thermostats which are tied into "Step-up" solenoids for the curb idle. What happens is idle speed is suppose to drop when the engine is hot.
When someone adjusts the curb idle while the engine is on the "cold setting", the setting(rpm) will be too low once the engine has heated up and the part drops to a hot setting.
So to clearly define your problem, you have 2 stemming from the same defects. The "in motion" problem is caused by timing changes based on temperature and the "idle" problem is caused by improper adjustment of the curb idle solenoid because of unstable operating temperature.
What you want to do is change your thermostat. This will give you a stable temperature. Then let the engine heat up and you should notice a "click" and the engine should idle down. It may stall. Then turn the idle rpm up until the engine will not stall.
The hic-cups should disappear once the operating temp is reached. If you still have problems then look for the water temperature sensors before replacing expensive parts.

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If you recently replaced the battery, you may need to reset the idle air control valve setting. This is done by removing the NEGATIVE battery wire from the battery while the vehicle is HOT. Then you must wait several hours for the vehicle engine to become cold. Next, once could, reconnect the negative cable. Start the vehicle, place your foot on the brake and imediately put the vehicle in drive. Stay in that situation until the vehicle engine bcomes hot to normal temperature range. This will be known by hearing the radiator cooling fan turning on. You must NOT use the airconditioner during this cause it will be on during the event. Once accomlplished place in park and allow the engine to cool, engine off. This resets the engine computer to tell the idle/load speed control valve to add air and resuling in additional fuel to the engine under various torque loads.

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1 Answer

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Wow!!! Now that's a headfull of problems....
This could be a great many things...
Check these before you sell. I have a '93 Aerostar and can't live without it.
1. Check idle speed
2. Fuel filter may be clogged or water in the fuel system.
3. Choke improperly adjusted or sticking.
4. Distributor components damp or damaged.
5. Faulty emissions components.
6. Faulty or incorrectly gapped spark plugs/ Also check wires.
7. Vacuum leak at the carburetor/fuel injection unit or vacuum hoses.
8. On 1986 models, stalling during idle or deceleration may be caused by sludge in the throttlebody. (2.3 litre engine)
9. On 1986 & 1987 models with a 2.3 litre engine,hesitation or stalling during acceleration may be caused by carbon build-up on the intake valves.....I hope this helps!! Adios

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