Question about 1994 Ford Mustang

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Element on distributor rotor keeps breaking off disabling the vehicle. How do you fix the problem?

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  • Obertelli
    Obertelli Jun 05, 2010

    Have you been using genuine Ford spares supplied by a reputable supplier?



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It sounds as if the distributor shaft is moving, causing the rotor contact to collide with the distributor cap. With the cap off have someone turn the engine over and watch the rotor for a wobble. If there is a wobble either the bushings/bearings in the distributor housing are worn out or the shaft is bent or worn.

Posted on Jun 05, 2010


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2 Answers

1996. why do I keep replacing distributor cap and rotor?

The shaft may be worn and eccentric, causing premature wear.

Jul 25, 2015 | Chevrolet Blazer Cars & Trucks

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How to change cam shaft sensor on 1997 5.7 1500 chev truck

Camshaft Position Sensor Replacement (5.0L, 5.7L)

Removal Procedure

    Caution: Refer to

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

    For Vehicles equipped with OnStar® (UE1) with Back Up Battery:

    The Back Up Battery is a redundant power supply to allow limited OnStar® functionality in the event of a main vehicle battery power disruption to the VCIM (OnStar®module). Do not disconnect the main vehicle battery or remove the OnStar® fuse with the ignition key in any position other than OFF. Retained accessory power (RAP) should be allowed to time out or be disabled (simply opening the driver door should disable RAP) before disconnecting power. Disconnecting power to the OnStar® module in any way while the ignition is On or with RAP activated may cause activation of the OnStar® Back-Up Battery (BUB) system and will discharge and permanently damage the back-up battery. Once the Back-Up Battery is activated it will stay on until it has completely discharged. The BUB is not rechargeable and once activated the BUB must be replaced.

  1. Disconnect the negative battery cable.

  2. Disconnect the spark plug wires and ignition coil wire from the distributor.

  3. Disconnect the CMP sensor harness connector from the distributor.

  4. Remove the distributor cap screws.

  5. Remove the distributor cap.

  6. Remove the rotor screws.

  7. Remove the rotor.

  8. Remove the CMP sensor screws.

  9. Align the square slot in the reluctor wheel with the CMP sensor.

  10. Remove the CMP sensor.

Installation Procedure

Important: Do not use the old cap screws, CMP sensor screws, or rotor screws. Use replacement screws that have been coated with a thread locking compound. Precoated replacement cap and CMP sensor screws can be acquired using P/N 10475922 (pkg of 10 screws). Precoated replacement rotor screws can be acquired using P/N 10475924 (pkg of 10 screws).

  1. Align the square slot in the reluctor wheel with the CMP sensor.

  2. Insert the CMP sensor through the reluctor wheel slot.

  3. Notice: Refer to Fastener Notice in Cautions and Notices.

  4. Install new CMP sensor mounting screws.


    Tighten the fasteners to 1.6-2.8 [n-m] (14-25 lb in).

  5. Important: The locating tabs on the rotor are necessary for correct alignment of the rotor. If the tabs are missing or damaged, replace the rotor.

  6. Install the rotor onto the reluctor wheel.

  7. Install new rotor fasteners.


    Tighten the screws to 1.5-2.4 [n-m] (13-22 lb in)

  8. Install the distributor cap.

  9. Install new distributor cap screws.


    Tighten the screws to 1.8-3.0 [n-m] (16-26 lb in)

  10. Connect the CMP sensor harness connector.

  11. Connect the spark plug wires and ignition coil wire.

  12. Connect the negative battery cable.

May 16, 2015 | Chevrolet Cars & Trucks

1 Answer

Spark plug wires installed wrong

I did this also recently, but I also changed the distributor cap and rotor. THAT was my problem....Distributor screw tabs on distributor are plastic and can break off.....1st...Make sure you installed the wires in the right firing order. If they're correct, check your cap and rotor and make sure they are seated correctly. If the tabs broke off, Napa makes a metal U shaped piece that fixes this.

Jan 13, 2014 | 1996 Chevrolet S-10 Pickup

1 Answer

Misfiring on cylinders 1 2 3

Need more information about the vehicle but sounds like the distributor cap and or rotor may be corroded. The points of contact can become covered with electrical corrosion. if you clean the four points and the rotor under the distributor cap it may fix the problem.


Dec 29, 2012 | Volkswagen Jetta Cars & Trucks

1 Answer

How to tell which distributor I have in my 1991 Honda Civic LX 1.5L

Best will be to remove the distributor and to use as a sample.

Jun 25, 2012 | 1991 Honda Civic

2 Answers

I have a 1987 honda crx and for some reason when i exceed 55mph for a long period of time it cuts off. does anyone know what this could be from??

When your Honda cuts off there is alot of reason it does that,one possiblity it doesnt see a crank signal and its breaking down,or the cam signal both of these are in the distributor, or the rotor can be slipping out of position,(distributor rotor). or the ignitor breaking down,to a ignition switch the electrical componenet breaking down,to even a plugged fuel filter causing the vehicle to starve for fuel.Just for maintance concern replace the fuel filter.3_25_2012_11_22_31_pm.jpg

Mar 25, 2012 | Honda CRX Cars & Trucks

1 Answer

I have a 91 integra and the rotor button keeps breaking off in the distributor. I have put 2 new distributors on and the same thing keeps happening.

Hi There.
Check and see if you have the correct rotor arm, check the hieght against the old one if you still have it, if that doesnt do any thing check and make sure that the rotor arm is seated properly on the rotor shaft..

May 02, 2011 | Acura Integra Cars & Trucks

1 Answer

Car is out of time....cause trying to change the distributor cab, by mistake the crantshaf was moved and now the timing in the chevy is out of line

If you only replaced the distributor cap and did not remove the distributor or loosen the holdown bolt that keeps it from moving, turning the engine won't have any effect on the timing.. Chances are that you put the wires back on the cap in the wrong order or began at the wrong starting point. As long as the distributor has not been removed from the engine, to find #1, turn the crank to 0 and look at the rotor. If it points to the firewall, turn the engine one more time 'till it points to the front. Wherever it points is #1.If you loosened the distributor and turned it, turn the housing 'till the closest wire tower aligns with the rotor, then lock it down
If it is a v8 engine, the order is 18436572 in the direction the rotor turns when cranking or running. You can look up the order for v6 engines in any haynes or chilton manual.
To set the timing without a timing light, start the engine, put the transmission in drive and keep your foot on the brake to keep the vehicle from moving, then apply more some point the engine will begin to rattle (detonate) if the timing is too far advanced. You need to keep turning the distributor and repeating the process till it detonates, then turn the distributor back about 1/4". That should give you a good "ballpark" timing setting 'till you can get someone to do it correctly. (process is called power timing) When finished, tighten the distributor down so it does not change while driving. NOTE: When power timing, allways have room in front of the vehicle so you won't crash into anything, and NEVER permit anyone to stand in front of it.

May 03, 2010 | 1995 Chevrolet Caprice Classic

2 Answers

Engine stalls without warning

check engine light comes on after driving any given amount of time. Replaced egnition modual didn't work, replaced pcv valve, didn't work, replaced stater module, didn't work, replaced the fuel filter, didn't work. Took it in for diagnostics and was told that it is either the egnition module, computer, or the wires that are attached to the computer that go out to different parts in the engine.

Jul 29, 2008 | 1993 Chevrolet Caprice

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