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Vehicle stalling has trouble holding idle

Idle adjustment notice loose connection at drive side cam sensor adjusted pin fit

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DID YOU CHANGE AIR FILTER,CLEAN THROTTLE BODY THEN TRY TO BRING UP LOW IDLE IS A SET SCREW.IF NOT COULD BE IAC SENSOR.

Posted on Dec 01, 2014

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Posted on Jan 02, 2017

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How do I change the Throttle Position Sensor


Some throttle position sensors are adjustable. Follow manufacturer's instructions.
  • On older engines, correct adjustment is crucial to proper system operation.
  • On newer engines, this is not as important because the computer uses whatever reading it takes at idle as base voltage (adaptive learn strategy).
Incorrect TP sensor adjustment may cause:
  • Inaccurate idle speed,
  • Engine stalling, and
  • Acceleration stumbles.
Follow these steps to adjust a typical TP sensor:
  • Backprobe the TP sensor signal wire and connect a voltmeter from this wire to ground.
  • Turn on the ignition switch and observe the voltmeter reading with the throttle in the idle position.
  • If the TP sensor does not provide the specified voltage, loosen the TP sensor mounting bolts and rotate the sensor housing until the specified voltage is indicated on the voltmeter.
f32-29.gif A TP Sensor with elongated slots for sensor adjustments. Courtesy of General Motors Corporation - Chevrolet Motor Division.
  • Hold the sensor in this position and tighten the mounting bolts to the specified torque.
Most throttle position sensors are made so that their adjustments are tamperproof. They have screws that are either soldered or staked.
To remove the switch, these might need to be drilled or filed off. After the new switch is installed and adjusted, the new mounting screws are restaked.

May 24, 2012 | 1991 Buick Regal

1 Answer

1996 dodge caravan 2.4 code p1294


on dodge motors
fitted a lot of parts and still no better

the fault code clears and comes back as a intermittent problem

could be electrical voltage drop off or heat related failure

i wonder if your 02 sensor ,the catalytic converter
or other related sensors
are causing the fault to come back
if needed .....fit a new air filter...

how the test is determined

P1294-TARGET IDLE NOT REACHED 3.3L/3.8L
When Monitored and Set Condition:
P1294-TARGET IDLE NOT REACHED 3.3L/3.8L
When Monitored: With the engine idling and the transmission in drive, if automatic.
There must not be a MAP sensor trouble code or a Throttle Position Sensor trouble code.
Set Condition: The engine idle is not within 200 rpm above or 100 rpm below the target
idle for 40 seconds. One trip fault.

POSSIBLE CAUSES
INTERMITTENT CONDITION
IAC MOTOR PASSAGES
VACUUM LEAKS
AIR INDUCTION SYSTEM
THROTTLE BODY AND THROTTLE LINKAGE
TEST ACTION APPLICABILITY
images-trsfwikau0d5dnlwn4zno1ix-3-0.jpg

Mar 01, 2017 | Cars & Trucks

1 Answer

Just started idling rough, sometimes stalling


Shot in the dark here without knowing the vehicle but it could be an Idle Air Control valve starting to fail. An IAC (idle air control) motor is designed to adjust the engine idle RPM speed by opening and closing an air bypass passage inside the throttle body. The cars computer or PCM (powertrain control module) receives information from various sensors and will output signals to adjust the idle air control motor in or out to adjust engine idle speed by controlling engine idle air. An idle air control motor can fail one of two ways, either the motor short circuits and stops working or the motor will develop high resistance and cause the idle air control motor to react slowly, either failure can cause the engine to stall at idle. When a trouble code scan is performed it sometimes won't always detect a failed or weak idle air control motor. To check the idle air control motor remove the unit, with the wires connected turn the key to the "on" position without starting the engine, the idle air control should move in or out. If the idle air control motor does nothing it has probably failed, replace it with a new unit and recheck system. Note: while the idle air control motor is removed clean (use aerosol carburetor cleaner) the passages the idle air control uses to control idle air speed, also inspect the idle air control for a build-up on the seating (pointed) end and clean as necessary.

Jul 20, 2011 | Mazda B2300 Cars & Trucks

1 Answer

How do I get the rear spindle off so I can replace the emergency brake shoes on my 2006 chrysler pacifica?



Adjustment

  1. Place parking brake lever in -full released- position.
  2. Raise and support vehicle.
  3. Remove plug in parking brake shoe support to access adjuster star-wheel.
  4. Through the access hole, rotate the adjuster star wheel in the following direction to expand the shoes outward against the drum:
    1. Left brake - Rotate star-wheel toward rear of vehicle.
    2. Right brake - Rotate star-wheel toward front of vehicle.
  5. Using an appropriate tool, turn adjuster star wheel until wheel will not rotate (dead lock).
  6. Back off adjuster six detents (teeth).
  7. Rotate wheel, checking for light drag. If drag is too heavy, continue to back off adjuster one detent at a time until light drag is present. Do not back off star-wheel more than 17 detents from wheel lock.
  8. Install access plug.
  9. Adjust opposite wheel parking brake shoes using same method.
  10. Lower vehicle.
  11. Apply and release parking brake lever once to ensure proper operation of parking brakes.


Removal & Installation NOTE The following procedure may be used to remove shoes on either side of the vehicle.

  1. Lock out automatic adjuster in parking brake lever.
  2. Raise and support vehicle.
  3. Access and remove rear hub and bearing.
  4. Remove parking brake cable bolt at knuckle.
  5. Completely back off parking brake shoe adjustment.
  6. Remove parking brake shoe adjuster spring.
  7. Remove shoe adjuster.
  8. Remove upper brake shoe hold-down clip and pin.
  9. Remove lower brake shoe hold-down clip and pin.
  10. Remove upper and lower shoes with return spring from shoe actuator.
  11. Remove return spring from shoes.

    0996b43f80204c12.jpg

    Fig. View of the actuator (1), support (2), adjuster spring (3), return spring (4), caliper adapter (5), shoes (6), hold-down clips and pins (7) and adjuster (8)

To install:
  1. Install return spring between upper and lower shoes.
    NOTE Before installing shoes on actuator, make sure actuator hooked to rear cable is positioned with word -UP- facing outward.
  2. Install upper and lower shoes with return spring on shoe actuator located on parking brake cable.
  3. Install lower brake shoe hold-down pin through rear of support and lower shoe, then install hold-down clip.
  4. Install upper brake shoe hold-down pin through rear of support and upper shoe, then install hold-down clip.
  5. Install shoe adjuster. Place end of adjuster with star wheel upward.
  6. Install parking brake shoe adjuster spring.
  7. Install bolt securing parking brake cable to knuckle and tighten bolt to 21 ft. lbs. (28 Nm).
  8. Using Brake Shoe Gauge, Special Tool C-3919, or equivalent, measure inside diameter of parking brake drum portion of rotor.
  9. Place Gauge over parking brake shoes at widest point.
  10. Using adjuster star wheel, adjust parking brake shoes until linings on both park brake shoes just touch jaws on gauge. This will give a good preliminary adjustment of parking brake shoes, before a final adjustment is made at end of this procedure.
  11. Install hub and bearing with wheel speed sensor as well as all components necessary to access it.
  12. Lower vehicle.
  13. Unlock automatic adjuster in parking brake lever.
  14. Perform final adjustment of parking brake shoes

  15. Adjustment This vehicle is equipped with permanently sealed rear wheel bearings. There is no periodic lubrication or maintenance recommended for these units.


    Removal & Installation

    1. Raise and support vehicle.
    2. Remove wheel mounting nuts, then tire and wheel assembly.
    3. If equipped with AWD:
      1. Remove cotter pin, nut lock and spring washer from half shaft.
      2. While a helper applies brakes to keep hub from turning, remove hub nut and washer.
    4. Remove brake caliper and rotor from hub and bearing assembly.

      0996b43f807cb548.jpg

      Fig. Hub assembly

    5. Disconnect vehicle wiring harness connector at wheel speed sensor connector.
    6. Unclip wheel speed sensor connector from spare tire mounting support.
    7. Disconnect two sensor cable routing clips on rear suspension crossmember.
    8. Disconnect two sensor cable routing clips along toe link.
    9. Disconnect sensor cable from bracket on brake support.

      0996b43f807cb54d.jpg
    10. Completely loosen, but do not remove four bolts fastening hub and bearing in place. Once loosened from threads in hub and bearing, push bolts up against rear of hub and bearing to keep brake support plate in place when hub and bearing is removed.

      0996b43f807cb54e.jpg

      Fig. Rear hub and bearing mounting bolts

    11. Pull hub and bearing off knuckle and half shaft (if equipped with AWD), then thread wheel speed sensor cable through hole in brake support plate as it is removed with hub and bearing.
      0996b43f807cb54f.jpg
    To install:
    1. Position hub and bearing bolts though rear of knuckle and parking brake support just enough to hold support in place as hub and bearing is installed.
    2. Install hub and bearing by first feeding end of wheel speed sensor cable through hole in bottom of parking brake support. As this is being done, if equipped with AWD, slide hub and bearing onto half shaft. Place hub and bearing through brake support, onto knuckle, lining up mounting bolt holes with bolts and placing wheel speed sensor head at bottom.
    3. Install four bolts fastening hub and bearing in place. Tighten mounting bolts to 60 ft. lbs. (81 Nm).
    4. Place wheel speed sensor cable routing grommet into bracket on parking brake support.
    5. Route wheel speed sensor cable along toe link and rear suspension crossmember connecting routing clips where shown.
    1. Connect vehicle wiring harness to wheel speed sensor connector.
    2. Install brake rotor and caliper.
    3. If equipped with AWD:
      1. Install washer and hub nut on end of half shaft.
      2. While a helper applies brakes to keep hub from turning, tighten hub nut to 180 ft. lbs. (244 Nm).
      3. Install spring washer, nut lock and cotter pin on end of half shaft.
    4. Install tire and wheel assembly. Install and tighten wheel mounting nuts to 100 ft. lbs. (135 Nm).




May 18, 2011 | 2006 Chrysler Pacifica

1 Answer

My vehicle stopped dead at set of lights and would not start, called RACQ he installed new battery $165 Stated that was problem, drove less than 1/2 kilometre down road, felt the vehicle ****. Continued...


Sounds like you have a fuel issue. It could be a fuel pump cutting in and out. It could be fuel pressure regulator, or an injector not spraying correct. I think it's time to find an honest educated repairman.

Mar 02, 2011 | 2001 Hyundai XG300

1 Answer

Fast idle


The specification calls for 900 rpms for the idle speed when warm for the 1987 Dodge Shadow.

One can adjust this with a screw on the carburetor, if it has one.

If it's fuel injected the idle speed is automatically controlled.

Fast Idle Speed HOLLEY 5220/6520 Fig. 5: Turn the adjusting screw with a screwdriver to raise or lower the fast idle speed — make sure that the adjusting screw is resting against the lowest speed step 86735g04.gif
NOTE: This procedure is performed while the carburetor is installed on the engine.
  1. On 1981–82 cars, disengage the two-way electrical connector at the carburetor (red and tan wires).
  2. On all years, disconnect the jumper wire at the radiator fan and install a jumper wire so that the fan runs continuously.
  3. On 1983–86 models, pull the PCV valve out of the valve cover and allow it to draw underhood air.
  4. Disengage the oxygen sensor system connector located on the left fender shield near the shock tower.
  5. Ground the carburetor switch with a jumper wire.
  6. Open the throttle slightly and place the adjustment screw on the slowest speed step of the fast idle cam.
  7. With the choke fully open, adjust the fast idle speed to comply with the value indicated on the underhood sticker.
  8. Return the vehicle to curb idle, then reposition the adjusting screw on the slowest speed step of the fast idle cam to verify fast idle speed. Re-adjust as necessary.
  9. Turn the engine OFF, remove the jumper wire and reconnect the fan.
  10. Reinstall the PCV valve and remove the tachometer. On 1983–86 models, reattach the oxygen sensor system connector, and remove the jumper wire from the carburetor.
Fast Idle Opening MIKUNI
  1. Before adjustment, leave the carburetor alone for approximately one hour at 73°F (23°C).
  2. Adjust the fast idle opening by turning the fast idle adjusting screw to the following specified values (drill diameter):
    • 2.6L engines equipped with manual transaxles — 0.028 in.
    • 2.6L engines equipped with automatic transaxles — 0.031 in.
Choke Valve Setting MIKUNI Fig. 6: After tightening the choke cover lockscrews, cut the heads off of lockscrews A (total of 3 screws) and stake the heads of lockscrews B (total of 2 screws) with a blunt punch 86735g56.gif
NOTE: This procedure need only be performed if the carburetor is disassembled.
  1. Fit the strangler spring to the choke lever.
  2. Assemble the choke valve, aligning the inscribed line or black painted line on the tooth of the choke pinion with the inscribed line on the cam lever.
  3. Temporarily tighten the new lockscrews.
  4. Set the choke valve by moving the pinion arm up or down, align a punched mark on the float chamber cover at the center of the three inscribed lines, and secure the pinion arm with the lockscrews.
  5. Install the choke cover and tighten the lockscrews.
  6. Cut off the heads off of lockscrews A.
  7. Stake the heads of lockscrews B using a blunt punch.
Vacuum Kick HOLLEY 5220/6520 NOTE: This procedure is performed while the carburetor is installed on the engine. If the vacuum kick is adjusted to open the choke too far, the engine may stall or idle very roughly just after cold start. If it is adjusted so that the choke does not open enough, there may be black smoke in the exhaust. NOTE: To perform this procedure, you will need a hand held vacuum pump capable of producing at least 15 in. Hg (50.6 kPa) of vacuum. The vacuum kick diaphragm may be damaged if you attempt to retract it manually. You will also need a drill or dowel which has a diameter equivalent to the specification for Vacuum Kick in the Carburetor Specifications Chart.
  1. Remove the air cleaner. Open the throttle, close the choke and hold it in the closed position, and then release the throttle to trap the fast idle cam in the choke-closed position.
  2. Disconnect the vacuum hose at the choke vacuum kick diaphragm. Connect a vacuum pump and apply 15 in. Hg (50.6 kPa) or more of vacuum.
  3. Gently move the choke blade toward the closed position just until play is eliminated from the vacuum kick linkage (so that the vacuum kick is determining choke blade position).
  4. Insert the drill or dowel into the gap between the upper edge of the choke blade and the air horn wall, toward the center of the gap. The dowel or drill should just fit into the gap. If necessary, rotate the Allen head screw in the center of the diaphragm housing to create the proper gap and then recheck with the measuring device.
  5. Restore all vacuum connections and reinstall the air cleaner.

Aug 05, 2010 | 1987 Dodge Shadow

2 Answers

1996 jeep grand cherokee limited. engine is shutting off/stalling out while driving/idleing. there are no check engine or check gauges light appearing. coolant sensor is now being displayed sometimes as...


You should have someone sing a dual trace lab scope, look at the Crank Angle Sensor (CKP) and Cam Angle Sensor (CMP) signals to check quality and sync.

Loose timing chains or broken flex plates can change the sync signal to the Powertrain Control Module (PCM) and cause a stall situation. Also you should have someone load test the battery and check the cables for corrosion. If the battery drops excessively during startup, the idle motor stepper count can be lost, Powertrain Control Module (PCM) will relearn it while driving.

Clean the throttle blades and adjust minimum idle.

With the air cleaner assembly off, hold the throttle wide open and look down the throttle with a flash light. Look at the lower intake plenum gasket for leaks, oil will build up around the edges and in the corners.

Perform distributor sync adjustment. I hope this helps. tried my best.....

Nov 05, 2009 | 1994 Jeep Grand Cherokee

2 Answers

Low idle, stalling frequently


Hi, Check all vacume hoses and fittings make sure there are no vacume leaks also make sure ignition timing is correct.

Dec 01, 2008 | 1987 Toyota 4Runner

2 Answers

Engine is shaking


check the idle, it is too low will stall when you are driving, just need to adjust the idle and make it a little faster only

Jul 06, 2008 | 2003 Toyota Camry

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