Question about 1998 Ford Explorer

2 Answers

Mechanic changed the idle sensor. now truck will not start.whats wrong

Posted by on

Ad

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 248 Answers

The sensor that was changed is called the Idle Air Control (IAC) sensor. The purpose of this sensor is to control the car's idle under various operating conditions. In order for it to function correctly, the internal components must be clean (meaning, little or no carbon build up) and it must be undamaged undamaged. Are you sure he replaced this sensor? The reason I ask is that sometimes the IAC can be cleaned; however, if this cleaning procedure is not properly done, the IAC can become damaged. The IAC is located on the engine's throttle body. If your mechanic did replace this IAC, a new piece will stick out like a sore thumb. Take a look and see if he did infact replace your IAC. Either way, I would take the car back to this mechanic and make him correct the problem.

Please remember to rate my suggestion/solution. Thanks!

Posted on Jan 16, 2011

Testimonial: "great advice"

Ad
  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 254 Answers

The idle valve may be deffective or debry dirt is blocking passage try pressing accelerator while trying to start if it run with gas and wont at idle check the steps i suggest let me know if this helps you at all

Posted on Jan 16, 2011

  • 2 more comments 
  • egene41 Jan 16, 2011

    the idle valve actually makes a clicking noise when i turn key is this normal

  • sean hutt
    sean hutt Jan 16, 2011

    no the valve is jammed remove valve conet wire turn in key to run quick for 1 second then reattatch valve this will reset valve let me know thnx for the reply

  • sean hutt
    sean hutt Jan 16, 2011

    when you have valve out check passages for dirt or debri clean blow air in passages let me know if this helps you

  • sean hutt
    sean hutt Jan 16, 2011

    did this help you let me know

×

Ad

1 Suggested Answer

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I have a 2002 Toyota Avalon that I purchased new that now has 295000 miles and has developed a fast idle condition at start up that idles between 1500 and 2000 rpm. It will not return to normal idle u


If you have not run the fault codes then that would be a good place to start. It will save you money as it will pinpoint the failing sensor.

Nov 04, 2014 | 2002 Toyota Avalon

1 Answer

What is the map sensor code for a 1992 honda accord


1. yes a 1992 Honda accord has a map sensor and what accord do you have engine wise ?? because theres different codes 2. it could be a idle air control valve because if they get dirty they can cause the car to rev high low or even stall and cause the car to run crappy.

Apr 23, 2014 | 1999 Honda Accord

1 Answer

I have an 04 pt cruiser 2.4 non turbo replaced idle air control valve, computer, fuel pump/strainer,crank position sensor, intake air temp sensor,spark plug/wires, timing belt, oil pressure switch both...


try finding a mechanic with an old style oscilliscope tune machine so you can actually see what the mixtures and spark are like running i suspect cam or crank angle sensors

Nov 09, 2013 | Cars & Trucks

1 Answer

I have an 83 f-150 351w, in cold temps the truck won't idle till it warms up, then when it does it idles really fast, it also revs high, what can the problem be, also wen going at highway speeds after...


It sounds like it is working backwards. Around the time your truck was made the industry had different emissions standards for trucks and cars. There were less controls on trucks.

There were vacuum controls that would increase idle speed when the engine was cold. The way this was done is through a water temperature sensor that is commonly called a vacuum tree. It is called a tree because it is shaped like a tree trunk with a few branches and each branch has a vacuum hose. As water temperature increases the vacuum routing changes. The cold setting makes an idle step-up dash-pot raise RPM and close the choke plate. As the water warms, the internal parts of the vacuum tree move and change the vacuum ports.

When the ports change, RPM drops and the choke plate opens and low idle speeds are restored. With the choke plate open high speed operation of the motor is assured without bogging down.

I would say most of what can be wrong is cheap to fix. A new thermostat, perhaps a new vacuum tree. Your problem can also be the vacuum lines are not connected to the correct ports. One thing many people do is to adjust the idle speed at the wrong time. The step-up cams are not in the proper position and when stuff starts working everything is out of adjustment because the changes were made at the wrong time.

This is a job for an old school mechanic.

Oct 06, 2017 | 1983 Ford F150

1 Answer

Oil gauge on a 2003 gmc sierra is reading beyond 80, its all the way down. could it be serious? Just had oil change last week.


I'm assuming that this reading is at idle? The range for oil pressure is more like 30-40PSI at idle and 10-20 more at speed. The reasons your pressure is reading too high could be:

--The gauge or the sensor itself is bad (not uncommon)
--The mechanic used the wrong oil viscosity when changing your oil, and the thicker oil than specifications call for is causing higher pressures.
--The mechanic accidentally knocked off the wire to the oil sensor when changing the oil
--A bypass valve in the pump or filter is clogged and causing the high pressure.

This is a relatively new car and if this problem developed immediately after the oil change I'd suspect the wrong oil was used or the wire to the sensor was knocked off. If the problem developed near the oil change, but not right after, I'd suspect it was coincidence and that there is a problem with the gauge. Go back to your mechanic.

Nov 25, 2010 | GMC Sierra 1500 Cars & Trucks

1 Answer

I took my 1993 chevy truck to a mechanic to change the head seals and i got it back with over heating problems and after a couple days it started eith high iddle i changed the radiator thermostat clutch...


Head seals?? Do you mean head gasket? So it overheats & high idles? It almost sounds like the wrong head gasket was used (its possible) also, if the vehicle overheats, have you looked at the water pump? I would worry about the overheating more than the high idle.

May 29, 2010 | Chevrolet C1500 Cars & Trucks

1 Answer

Bogs when accelerating from an idle, rough starts.


listen for a vaccum leak.also try disconecting bat for 5 min the reconnect and start truck and hold idle at 1500-2000 for 5 min. this resets and teaches computer to self adjust

Nov 08, 2008 | 1991 Ford F150

Not finding what you are looking for?
1998 Ford Explorer Logo

315 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

Marvin
Marvin

Level 3 Expert

85206 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22484 Answers

gerry bissi

Level 3 Expert

4388 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...