Question about 2000 Ford Crown Victoria

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Low voltage at idle

Whenever I reach a stop light my voltage drops real bad then I step on the gas and goes back to normal. it shoots back up when I hit neutral

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  • 69 Answers

You might need to remove the alternator and carry it down to your partstore so they can bench test it and determine if it is charging properly? It could be the voltage regulator in the back of the alternator which held by four screws?

Posted on Jan 07, 2015

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Posted on Jan 02, 2017

SOURCE: rough idle when sitting at a red light until van warms up

change plugs

Posted on Oct 20, 2008

  • 2 Answers

SOURCE: 2004 Ford Ranger Low Idle

I figured out what was going on. supposedly on ford rangers the Idle Air Control Valve (IAC Valve) goes bad. i got a trouble code looked it up and sure enough it is the IAC Valve. Under 100 bucks for the part

Posted on Jul 13, 2008

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SOURCE: 1994 f-350 7.3 turbo diesel.tach reading 0 rpm's at idle speed.

yea the 93 to 95 trucks never had a tach that works very long
and first the Tach does not make the od light blink or ck engine lgt
the crank trigger does this little thing is located right in middle front of engine between the vac pump and pwr steering pmp looks like a brass bolt with wires comming out of the back of it costs about 30 bucks (don't forget the locktite blue)
now that should fix the od lights and the ck engine but it may not fix the tach thats done in the tach driver module on back of tach in dash
you can replace this but my vote it's too expensive I did mine just fine with a after market one(50 bucks), bolted it right in front of old one, it hooks up super easy gets it's signal off the alternator stator

im sort of suprized it starts ok with a bad crank trig (eec needs to see +50 rpm to start fuel flow to injectors )

any good shop with a eec scanner can see this in just seconds

Posted on Oct 06, 2009

  • 63 Answers

SOURCE: Owner of 2004 Ford F250. Check engine light came

Check the fuel regulator at the end of the fuel rail. If if is not functioning properly it can cause the the problem that you are describing. Unfortunately other than doing an R&R with a known good regulator I do not know of a fool-proof test for this component.

Posted on May 03, 2010

  • 5280 Answers

SOURCE: 2001 ford windstar rpms drop low when idling and sometimes stalls

How long has this been going on? When a problem like this develops, it's always a good start to check for any fault codes in your engine's computer. Autozone and a few others will do a scan for free and give you any code numbers and technical descriptions, if the computer has stored any faults.
If you've kept track of normal maintenance over time, then a low idle should be a fairly easy problem to fix. That being said, it's not so simple. The computer controls your idle speed under all conditions, and relies on several sensors and switches (inputs and out puts) to work effectively. Have your mechanic check it with the low idle, dying problem in mind. Sounds to me like it needs tweaking-idle control valve, throttle position sensor, air flow meter. See? Get the proper diagnosis, so you don't buy unnecessary parts.
Maybe our ford guru, emissionwiz, will stroll along and find your fix from memory (he's the best).

Posted on Nov 04, 2011

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2 Answers

High temp low oil pressure light comes on after driving for a few minutes, then off when engine at driving rpm. At stop light (idle or low rpm) light comes back on. Normal driving it goes out.

You need to find out why you have low oil pressure. It is normal that as engine rpm's increase, the oil pressure will rise- the oil pump is moving oil faster. Even though your light goes out, you could still have critically low oil pressure. There should be sufficient pressure at idle to keep the light off. The light will come on when your oil pressure is almost nil- I believe for some it's as low as 8 psi. Normally, oil pressure at idle is specified anywhere from 15 to 40 psi. You would have to check specifications for your Expedition. To verify oil pressure, hook up a mechanical gauge at the oil pressure sending unit on the engine block. Check with a local shop.

The causes run from easy, simple to budget busting ruin. Low oil level, wrong grade oil, real old oil, oil leaks, internal oil leaks, worn oil pump, worn crankshaft bearings. It was pretty common on older very high mileage cars to have a fluttering oil light at stops and idle. It was time for a rebuild, or time to look for another car.

Jul 06, 2015 | 2003 Ford Expedition

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Oil light comes on when i put the clutch in and come to a stop

check the oil level in the sump. Ensure that the idle RPM is at 750rpm or above up to 1000rpm. Check for the correct grade of oil in the engine for you atmospheric temperature.

Feb 21, 2014 | 1994 Mitsubishi 3000GT

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95 montero transmission shift problems + overheating + battery not charging

The first step is to see if the gauge are correct,low voltage can cause many problems, the first step is to make sure the coolant is full so check radiator, this is done when cold, if full then start the engine with a meter on the battery and watch the voltage, have someone put it into drive while holding brake. if voltage on meter starts to drop then give a little gas to rev engine and see if voltage goes up, if it does then you may have to low an idle but if the idle is ok then alternator is bad. also have the battery tested to make sure its good, just because it starts the truck does not mean its good. the next thing is to look at the overheating problem. if the cooling system is full and it runs hot then that must be looked at,when the truck is starting to overheat we assume it is due to gauge, but this sounds like it may be low coolant or low voltage or idle is to low because when you put it in park it drops. start with these checks and let me know the results. good day.

Feb 19, 2012 | Cars & Trucks

1 Answer

Oil pressure is normal until it reaches200 degrees then oil presure drops to 10 pounds at an idle but give it gas and it goes up when its first started oil pressure is at 40 pounds until it reaches 200...

Oil pressure drop after reaching operating temp is normally caused by worn main bearings (depending on mileage).Worn bearings will allow pressure drop at idle and increase when accelerated above idle.

Jul 14, 2011 | 1999 Chevrolet Blazer

2 Answers

Low oil pressure when idling

how low is it it is normal for it to be about 20 psi when its hot an idling.. if u rev in neutral an it goes up thats good. if it dosent well thats either low oil, bad sensor, or bad oil pump.

Apr 07, 2011 | 1996 Chevrolet S-10 Pickup

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When stopped at red light, the volt gauge goes into neg range, as soon as I hit the gas it goes into pos, I replaced alltinator and battery, what elese could cause this problem ? it seem to do it more...

You have a voltage drop or drain and when teh car is off its still discharging the battery. Yes its possible you got a bad battery and I would return it first and foremost. If you notice the same problem you will need to investigate. The first culprit areas on most cars I see with this is a cabin light, glove box light, trunk light, or hood light staying illuminated. At night in the dark area or a garage leave all lights off and key out of ignition and then look around seams of each area to see if you have a glow or other light. If that doesnt work you will need a voltmeter and some time. First with the ignition off and key out of the column test the volts and amps from post to post on battery and insure you have a reading of 11.8 to 12.+ Switch to amps and see what amperage is being shown. Watch it for a second and see if the amps start to draw down. That indicates something is pulling amps. At that point you need to go to the fuse block and examine each fuse slot. Nothing shold draw more than .5 miliamp such as radio or security system in off position. If you note a draw of more then that is the culprit ... you will need to investigate the culprit and determine if its broken, such as radio, cd player, etc. Sometimes its as simple as a door not closing properly too! On some Camaros I have noted that unless teh AC fan speed switch is turned to the OFF position when not in use it drains some power as the fan stays running. Electrical problems are hard to determine. One other thing to consider.. if the car is idling rough at stops and you note an RPM drop or stutter.. the issue could be more with the intake system than the electrical system and when car is at park or idle even a good alternator wouldnt generate power turnign slowly.... when you accelerate teh belt speed increases and alternator goes back to putting out power... Let me know what you find.

Aug 14, 2010 | 1991 Chevrolet Camaro

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(1995) Often my car dies at stop signs. . . Nothing real weird happens. The rpm just drops and it has other issues though that I think are related. It also hesitates when to Drive the first time I...

The idle is set too low, the alternator is not charging enough, poor battery connection, filthy throttle body, dirty air filter are some of the most common causes of stalling at lower rpms.

Jun 19, 2010 | Cars & Trucks

1 Answer

My 1989 Daihatsu Charade CLS (3 Cylinder) has a low idle

The E-brake light is on because the brake is slightly on, or the fluid is low, or the brakes are failing It sounds like the fluid is getting low from normal brake wear and not a problem. Just get the front brakes cheched and replaced. Don't put any fluid in because the new brake pads which are thicker will take up the space the fluid has dropped and push the fluid back to the correct level

Your engine is shutting down at idle because of a a bad seal on the engine induction system. It is the big duct that connects to the engine air intake. Leave the car running at idle, E-Brake on, and squeeze the big black duct going from the air filter to the engine, Does the car shut off? Next check small little hoses that attache to this big air duct. Try moving them a little to see if the engine runs different.

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If it still runs bad a idle the idle valve could be dirty and now you need more tools to remove it and clean too.

May 27, 2009 | 1988 Daihatsu Charade

2 Answers

2004 Ford Ranger Low Idle

I figured out what was going on. supposedly on ford rangers the Idle Air Control Valve (IAC Valve) goes bad. i got a trouble code looked it up and sure enough it is the IAC Valve. Under 100 bucks for the part

Jul 04, 2008 | 2004 Ford Ranger

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