Question about Cars & Trucks

1 Answer

Idle troubleshooting my idle speed is not dropping after the engine warms up

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Cars & Trucks Master
  • 46,580 Answers

Run fault codes to find the faulty sensor.

Posted on Jan 02, 2014

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya Mechanic can help you resolve that 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 repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad
  • 1 Answer

SOURCE: Surging idle speed

check your high idle valve may need to be replaced.situated at the side of throttle body.

good luck
cyril

Posted on Jul 26, 2008

canbruce75
  • 1776 Answers

SOURCE: High idle speed when the engine is cold

The high idle speed at start up is normal. As the engine temperature increases, the engine idle should kick down automatically. Insofar as the emissions results, if there were a problem, the check engine light should be on. If it is, take the car to an autoparts store and have the fault codes read. Most parts stores will perform the scan for free. If the check engine light is not on, and the idle question was all you were worried about, you are good to go! Hope this helped and best wishes.

Posted on Jul 31, 2009

  • 1129 Answers

SOURCE: RPM drops to zero at idling after engine accelerates when warm

This may been an ignition module or a MAF sensor, this car may need to be diagnosed using a OBD I computer code reader to accurately diagnose the problem.

Posted on Aug 06, 2009

  • 2002 Answers

SOURCE: vw 1992 oil pressure drops when warmed up

Hook up a manual oil pressure guage and take readings of the actual amount of oil pressure in the engine. It may be that the switch is bad even though it is new. It may also be that you have low enough oil pressure at idle to trip the switch. On my 2.0 liter the low oil switch turns on at 4.4 PSI at idle but when the engine is revved up it turns on below 26 PSI. You may also have 2 oil pressure switches, one for low and one for high. They would be located very close together on the oil filter housing. Make sure you replaced the right switch.
You want to get this straightened out quickly as VW engines are very unforgiving when you put off repairs. Hope this helps.

Posted on Jul 12, 2010

Testimonial: "Thank you there are two oil switches on filter housing only one was replaced"

  • 4977 Answers

SOURCE: Oil pressure light at idle

when the light comes on at idle do you notice any engine noise different from the norm.if not then the oil pressure sensor(ops) is bad/weak and will need to be changed.if you hear abnormal noise with the light on then you will have to have teh oil pressure checked to see if its within specs.

Posted on Dec 07, 2011

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

The owners manual says to inspect idle speed at 160,000 mi, how is it done 2003 Honda CRV


Are you having an idle issue ??
Vehicle equipped w/Tachometer ??
Cold engine idle speed ??
Warm engine idle speed ??
Warm engine idle speed @ A/C requested on ??

May 28, 2015 | 2003 Honda CR-V

1 Answer

Tickover 1500 rpm when warm


idles too fast.
what engine?
what year?

on a gas engine, the idle speed is 100% controlled by PCM at all times. hot.
so its out of control that means the PCM closes the ISC valve.
and RPM will not drop. (its stuck open) or vacuum air leaks
jeeps use speed density EFI system using the MAP sensor.
this means all air leaks on jeeps , cause wild fast idle speeds.
that is all you need to know , to find problem (find leaks)

clean the ISC yet (idle speed control) valve.?

Mar 28, 2015 | Jeep Grand Cherokee Cars & Trucks

2 Answers

Why does my 1998 gmc jimmy rpm drop so low when its warm causing a miss in the engine


The truck ECM computer controls the idle speed based on a number of engine parameters. Idle drops to a minimum preset level when engine coolant reaches normal operating range and the engine goes into closed loop control. This idle is typically set at around 575 rpm, and cannot be changed without reprogramming the ECM. The miss is not caused by the idle speed - unless the engine is tuned properly and has not lost compression, this idle speed can result in a rough running engine at idle (typical with older 4.3L Vortec engines). Best bet is to get a complete tuneup which will include checking the O2 sensors, catalytic converter and cleaning the IAC valve and throttle body.

May 20, 2014 | 1998 GMC Jimmy

1 Answer

1993 Chevy C1500 4.3L V6 TBI starts but dies at idle after warming up.


Low pressure from fuel pump, when the pump is cold the pressure increases, as it warms up the pressure drops (this happens in a pump that is going out) the normal pressure should be at 40 with the key on and engine not running, when started the pressure should stay around 36, any less it won't idle and may run as long as you hold the pedal down. The injectors are opened electronicaly, so as long as there is fuel flow the engine gets fuel to run.So check the fuel pump, soundslike you need a new one

Apr 04, 2013 | Chevrolet Cars & Trucks

1 Answer

94 jeep grand cherokee. starts,idle. throw warmup. as soon as I touch the excellerator let up the rpm drop & engine stalls.


Most low idle speed problems on these engines are due to a faulty idle air control valve but since you state the idle will go up and return to idle then i would say it is working properly i think you have a throttle body coking problem ( dirt and grit accumulates around the butterfly valve in the throttlebody ) to fix this simply remove the fresh air hose from the throttlebody and open the throttle all the way up use a clen rag and wipe clean you may use a solvent such as B12 on the rag but dont use too much 1_4_2013_4_54_06_am.jpg

Jan 04, 2013 | 1994 Jeep Grand Cherokee

1 Answer

1996 Ford 300 six cylinder loses oil pressure when engine warms up


first you will have to say what the oil pressure is cold, idle and 2000 rpms and then hot idle and 2000 rpms before a decision to advise about a rebuild can be made
there are many reasons oil pressure can drop and not all require a rebuild

May 26, 2017 | Ford F-150 Cars & Trucks

1 Answer

Oil pressure light at idle


when the light comes on at idle do you notice any engine noise different from the norm.if not then the oil pressure sensor(ops) is bad/weak and will need to be changed.if you hear abnormal noise with the light on then you will have to have teh oil pressure checked to see if its within specs.

Dec 06, 2011 | 2001 Mazda Tribute

1 Answer

When the a/c is running, when you stop at an interesection the car stalls


That's usually caused be a low idle speed.
But the processor should increase the idle speed when the A/C is on.

Check the normal ,warmed up idle speed, then step on the brake pedal to see how much the idle drops with the stop light load. Then turn on the A/C to see how much the idle drops.

The processor should increase the idle speed to compensate for the increase in load on the engine.

Jul 22, 2011 | 1998 Mercury Sable

1 Answer

Idles up and down after warm up


THE COOLANT LEVEL IS LOW

on the older hondas even the newer ones idle speed is coolant temp controlled.

when the engine idles up the electronic coolant temp sensor is submerged in coolant and reads warm, so the engine computer idles the car down. the coolant level if low than drops from around the coolant temp sensor and it says the engine is cold, so the engine computer idles the car up.

which results in the constant rise and fall in engine rpm.

ADD COOLANT TO THE RADIATOR AND WATCH THE CAR MAGICALLY FIX ITSELF.

Apr 10, 2009 | 1993 Honda Accord

1 Answer

Good idling speed


This all depends on when you are reading the rpms becaus ethe engine will run faster when you first start it to bring it up to operating temperature than it will drop down to about 700-800 when the engine is warm. i recommend letting your engine warm up, than read your tach and if it is still reading 1000 rpms than reduce it down to 700-800. your ECU will compensate for this when your engine is cold.

this could also be a possible bad Idle Air Control Valve because your engine speed should be regulated by the computer.

Mar 30, 2009 | 1998 Honda Civic

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

40 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

77169 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22265 Answers

Randy Ohler

Level 3 Expert

14585 Answers

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

Answer questions

Manuals & User Guides

Loading...