Question about 1999 Pontiac Sunfire

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Distributor cap rotor

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Orielleys auto parts

Posted on Oct 12, 2013

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SERIOUS ENGINE MISFIRE, SPARK JUMPING FROM ROTTER INTO THE SCREWS HOLDING THE ROTTER. WHAT DO YOU SUGGEST?


I had a 96 tahoe 5.7 that gave me hell with the Distributor sparking to the wrong terminal. These Vortec engines use computer controlled timing, but still use a rotating distributor to determine which cylinder the coil's spark goes to. Twisting the distributor does not set the timing like it did for older engines, instead it just sets where the rotor is pointing relative to the cap when the computer decides to fire the coil. Aligning the rotor to the cap's electrodes at the instant of spark is called having the cap "indexed" to the rotor.

In my case the distributor was a few degrees off after an intake gasket change. The engine ran fine for a while, but was always sparking off to one side of the electrodes in in the cap due to mis-alignment. After a while, that side of each electrode became corroded, and rather spark around to the far side of the electrode, it was actually a shorter path to the clean side of the next electrode over. This resulted in stumbling and misfires.

I rotated the distributor a few degrees toward the corroded side and changed the cap and rotor. The next cap and rotor went about 10k further before acting up. I rotated towards the corroded side again, and the same cap and rotor have been running ever since.

Scribe a mark on your distributor and intake for reference and twist the distributor a few degrees towards the corroded side of the electrodes in the cap as the cap sits on the distributor. Don't forget if you take the cap off and flip it upside down, then you need to reverse the direction you twist. You want to twist the distributor cap towards the corroded side with the cap sitting in place on the distributor. This will help move the cap's electrodes closer to the center of the spark-range (as the computer jockeys the timing around, where the rotor electrode points at the instant of spark moves).

Feb 13, 2017 | 1999 Chevrolet Silverado 1500

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How to Replace a Distributor Cap in Toyota?


Its a plastic cap and and on its top the sparks wires get connected.A small plastic rotor spins inside the distributor cap, firing each spark plug as it rotates. If the distributor gets faulty there the engine may not perform well. in most cases it has been noticed that only replacing the cap does not helps but with cap the rotors also need to be replaced. The procedure is as follows:--- 1) First of all disconnect the negative battery terminal. 2) Then remove the spark-plug wires . Note:-- Before removing the spark plug wires please note down how and where the wires are connected,then only remove the connections. 3) Then on the distributor there will be a cap.remove that cap.the cap is connected by two pins.you will have to press the pins from each side to loosen the distributor cap.Then lift the distributor cap from the top. 4)Then remove the rotor From distributor The rotor is fitted with two screws.Remove the screws and loosen the rotor. 5) Then lift the rotor out from its shaft. 6) To install new rotor and cap.reverse the procedure. This will help.Thanks.

on Mar 25, 2010 | Toyota Corolla Cars & Trucks

1 Answer

What is air gap on distributor pickup on 87 Toyota 4x4 pickup w/22r


The rotor spins inside the distributor cap. At the end of the rotor is a curved metal piece. At each spark plug, inside the distributor cap are metal posts that are cut out. When rotor spins inside cap a spark jumps from the rotor end to the post, to the plug wire ,to the spark plug.The space between the rotor and post in the cap where the spark jumps, is the air gap.

Jul 09, 2014 | Cars & Trucks

1 Answer

I have a 92 passat GL that chuggs, jolts, then dies when I shift into 1st. The distributor cap falls down(still clipped in) trashing cap and rotor both. I've replaced cap and rotor 4 times in the last...


If the distributor cap falls down onto the rotor button then you have the wrong distributor cap and it is too big for your distributor. Run fault codes to check for accelerator position sensor fault and check MAP/MAF sensors.

Nov 02, 2013 | 1992 Volkswagen Passat

1 Answer

My 93 nissan altima stalled while driving and will not start back. put on a new coil, new fuel pump. still will not start. is it the crank sensor or distributor?


First, verify all connections at distributor (both ends of each cable) are securely connected and inspect all lengths of each plug wire to make sure there are no major breaks, cuts, burns, abrasions that would be causing a short. Then, try another plug just to make sure it's not a bad spark/coil wire. If still no spark, then I would say rotor/distributor cap/distributor/ICM module (Ignition Control Module) is the problem. You can generally buy those parts seperate, or you can buy a whole distributor that typically has all combined. The ICM can usually be removed without too much difficulty and taken to an autoparts store for a test, but not always. If you go with the "piecemeal" solution, start with ICM test (if removable), then rotor cap, then move to distrubutor cap. If nothing has worked to this point, you can replace the distributor, but you have already bought everything BUT the actual distributor. It would make sense to price everything seperately versus cost of new distributor...up to you.

If you do replace the distributor, be absolutely sure to mark the position/direction the rotor cap is pointed on old one, so you can re-install the new one in exact same position. Otherwise finding TDC (top dead center) on #1 cylinder is another whole process.

Oct 08, 2012 | 1993 Nissan Altima

1 Answer

Is it hard to change distributor on 2000 nissan pathfinder


Hi there;This is for a 2000 Nissan Truck Pathfinder 4WD 3.3L SFI 6cyl


Distributor Cap & Rotor - Removal & Installation


NOTE
The 1996-00 3.3L engines were equipped with a distributor.


Disconnect the negative battery cable.
If the distributor cap is to be replaced, mark the ignition wires for identification and remove them from the distributor cap.
Remove any components necessary to access the distributor cap.
Completely loosen the distributor cap mounting fasteners.
Carefully remove the distributor cap, taking care not to damage the cap seal or rotor, then position the cap aside.
If necessary, remove the rotor retainer.
Carefully lift the rotor off the distributor shaft.
NOTE
Inspect the distributor cap to housing seal for damage and/or cracks. Replace if cracks are detected.




To install:


Install the rotor onto the distributor shaft and tighten the rotor mounting fastener, if equipped.
Position the distributor cap seal on the distributor housing, then position the distributor cap on the housing.
Install the distributor cap by tightening the mounting fasteners in a crisscross pattern. Use care to not over-tighten the fasteners.
Reconnect the spark plug wires, making sure to install them exactly in the same position from which they were removed.
Reconnect the negative battery cable.

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Jun 06, 2012 | Nissan Pathfinder Cars & Trucks

1 Answer

97 dodge stratus 2.5 car turns over but does not have spark. There is fuel. I replaced the ECM crankshaft position sensor.


I would start with the rotor and cap. I just worked on one and it was the distributor was bad.

If you need to remove it and rplace it heres how.

Distributor Removal and Installation REMOVAL
  1. Remove bolt holding air inlet resonator to intake manifold.
  2. Loosen clamps holding air cleaner cover to air cleaner housing.
  3. Remove PCV make-up air hose from air inlet tube.
  4. Loosen hose clamp at throttle body.
  5. Remove air inlet tube, resonator and air cleaner cover.
  6. Remove EGR tube.
  7. Remove spark plug cables from distributor cap.
  8. Loosen distributor cap hold-down screws and remove cap.
  9. Mark rotor position for installation reference, then remove rotor.
  10. Remove two harness connectors from distributor.
  11. Remove two sets of distributor hold-down nuts and washers from studs.
  12. Remove bolt and spark plug cable mounting bracket from top of distributor housing.
  13. Remove bolt and transaxle dipstick tube.
  14. Carefully remove distributor from engine.
INSTALLATION
  1. Install rotor on shaft.
  2. Position distributor in engine and ensure O-ring is properly seated on distributor. Replace O-ring if it is cracked or nicked.
  3. Carefully engage distributor drive with slotted end of camshaft. When the distributor is installed properly, the rotor will be in line with previously marked line on air intake plenum.
  4. If engine was cranked while distributor was removed, establish proper relationship between distributor shaft and No. 1 piston position as follows:
    1. Rotate crankshaft until number one piston is at top of compression stroke.
    2. Rotate rotor to No. 1 rotor terminal.
    3. Lower distributor into opening, engaging distributor drive with drive on camshaft. With distributor fully seated on engine, rotor should be under No. 1 terminal.
  1. Install distributor hold-down washers and nuts. Torque to 9 ft-lbs .
  2. Install spark plug cable bracket.
  3. Install two harness connectors to distributor.
  4. Install distributor cap.
  5. Install transaxle dipstick tube.
  6. Install EGR tube to intake manifold. Torque bolts to 8 ft-lbs .

Mar 06, 2011 | Dodge Stratus Cars & Trucks

1 Answer

I need to replace ,the rotor button...


TAG OR NUMBER ALL SPARK PLUG WIRES ON THE DISTRIBUTOR CAP BEFORE REMOVING CAP. SO YOU CAN PUT PLUGS WIRES BACK IN THE ORIGINAL POSITION. WHEN ALL PLUGS WIRES ON DISTRIBUTOR CAP BEEN NUMBER.REMOVE ALL PLUG WIRES ON CAP.THEN REMOVE THE DISTRIBUTOR CAP.THEN MARK ROTOR POSITION WITH SHARPIE MARKER THEN REMOVE THE ROTOR.

Mar 02, 2011 | Chevrolet 1500 Cars & Trucks

2 Answers

My 400e mercedes is misfiring,and I hear a small metal pcs crunchy sound around the distributor cap,do u think that the rotor cap is bad


Your distributor bushing is bad, causing the distributor to wobble when running. Get it checked out for repair and/or replace the distributor. Take off the cap and check the play in the shaft that the rotor is attached to first.

Jan 27, 2010 | 1993 Mercedes-Benz Mercedes Benz 400 Class

1 Answer

ROTOR BURNING UP


The rotor is somehow making direct contact with one or more distributor contacts.

Check the contacts inthe cap to see if you find any physical damage to one or more contacts caused by the rotor.

Could be rotor lead too long (file it down) or maybe the distributor shaft is bent or not seated. Remove cap and observe the distributor shaft as someone cranks the engine. Does it wobble? Can't tell? Place a stiff reference parallel to the shaft and turn engine again.

Oct 07, 2009 | 1996 Chevrolet Suburban

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