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Spark to cap but not out of cap - Cars & Trucks

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CRACKED CAP AND IT MAY NOT BE VISIBLE TO THE ***** EYE

Posted on Dec 04, 2012

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Posted on Jan 02, 2017

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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

2 Answers

No spark at plugs


Do you mean you get spark from coil high tension wire to dizzy cap? If so, the only thing left is the cap and rotor and wires and the engine must have a good ground.

Apr 07, 2015 | Hyundai Motor 1993 Excel

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 spark at the cap but not to the sparks, already change rotr


Ok, heres how the spark works, coil, to cap,, along the rotor to the connection pins of the cap, to the spark plug wires,, and onto the plugs, inside the cap, make sure that the little center piece is hitting the center or the rotor, which goes out to the tip of the rotor,, that sends spark to the pins inside the cap,, now if your cap has any corrosion or tiny cracks,, that spark will go all over the place and not travel down its intended path, so clean off those contact pins in the cap, or replace it, if you have no spark to any of the plugs,, change the cap,, if its just to one or 2 , check the plug wires and the plugs themselves

Sep 28, 2011 | 1990 Ford Mustang

1 Answer

I need a wiring diagram for the ignition control module and distributor on a 2.8 litre v6 motor


OKAY STANDING IN FRONT OF ENGINE ON LEFT SIDE CYLINDERS FACING YOU IS 1 3 5 ON RIGHT SIDE DRIVER SIDE CYLINDERS FACING YOU IS 2 4 6 LOOKING AT DISTRIBUTOR CAP NUMBER 1 SPARK PLUG ON CAP IN THE 9 OCLOCK POSITION YOUR NUMBER 5 SPARK PLUG ON DISTRIBUTOR CAP IN 6 OCLOCK POSITION .STARTING AT NUMBER 1 SPARK PLUG ON CAP COUNTING CLOCKWISE COUNTING 1 2 3 4 5 6 THATS YOUR SPARK PLUGS WIRES ON CAP TO ENGINE PLUGS. 6 PLUG WIRE ON CAP IS AT 7 OCLOCK POSITION.

Feb 07, 2011 | 1988 Pontiac Firebird

1 Answer

Ignition problems sparks going to distributer cap but no where else


mcdevito75 here, Actaully the sparks come out of the distributor cap, the cap could have a crack in it, or if you do your own work you forgot to install the rotor under the cap, or you could have messed up the spark plug wires, wrong fireing order causeing resistance at the cap. have your local shop look at your car.

Mar 16, 2010 | 1997 Volkswagen Jetta

1 Answer

How change spark plug wire


alot of the 4 cyl vehicles spark plug leads are joined to distributor cap and come as complete assembly leads and cap.the new leads have cylinder numers on them and/or on dissy cap.
twist and pull to remove leads out of haed(spark plugs),remove 3 screws from dissy cap and replace.

Feb 15, 2010 | 1996 Toyota Corolla

1 Answer

My truck is a 1996 1/2ton there is gas getting to the engine and there is spark in the spark plugs we fixed the distributor cap and checked all the spark plug wires, the truck will turn over but it will...


Hmm, This sounds like a timing problem.

Best way to do this easily is that:

Take out the #1 spark plug crank/tap motor over until air comes out of spark plug hole--compression stroke(this is "TDC"---Top Dead Center)

Remove Distrubutor cap and check and see if rotor points to #1 spark plug wire on cap----if not move the #1 spark plug wire to that position on cap---then install rest of spark plug wires according to the firing order from the #1 plug wire.

Install #1 spark plug and start truck---you may have to rotate distributor a little bit to get best performance.

Jan 23, 2010 | 1996 Chevrolet C/K 2500

3 Answers

Spark from coil but not from plugs


Hello;
Take the distributor cap off, and turn the engine over. Does the rotor turn? Then pull the #1 spark plug and with your finger over the spark plug hole , tap the engine over to top dead center. See where the rotor is pointing. Also check to ensure your points are opening and closing. With an ohm meter make sure you have continuity through the carbon for the coil in the cap. Hope it helps.
Thanks;
Rich
RPM Northwest

Mar 31, 2009 | Volvo 240 Cars & Trucks

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