Question about 1986 Chevrolet Caprice
I got new spark plug wires and put them on one by one I didn't realize there are numbers on the new ones I don't know if that matters since I replaced them my 86 Chevy caprice classic runs like ****
I think I answered this. I believe the numbers are so that you have the correct length for each plug. There is no difference, except for the length. To isolate your problem pull one wire at a time and when the engine smoothness does not change, you've found the bad one. Check the plug. If it is okay, replace that wire with one of your old ones to see if that cures the problem. If that does not help, you might check the cap to see if there are any hairline cracks in it. I hope this is helpful.
Posted on Mar 28, 2014
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Posted on Jan 02, 2017
Diagram should be on the inside of the fuse box or relay cluster lid/cover. If Test light has 1 wire and a sharp tip? Yes, but only if you push the horn button too ;-)
My guess is that the horn lost its ground, but you can check this with the light. The horn only beeps when both GROUND and Pos 12v are present. The horn button gives the relay 12v to close, and the relay gives the horn 12v to operate. The ground is always connected.
Connect tester clipwire to 12v source (battery, headlight (has to be on) and touch its tip to metal of car. Does it light? Good. the tester is working and the 12v is a good source.
Touch one of the 2 horn connection or wires (poke it thru the plastic - why tip is sharp). Does it light? Touch the other, does it?
If both light, (1 will be brighter) we can assume the horn coil is good and it is getting a good ground and I was wrong (it happens... but not often). The side that is BRIGHTER is the ground wire side.
Now have someone mash the horn button. Do you hear a tiny click? That is the horn relay. If not, look for the horn relay fuse and replace it. If you DID hear the click, the relay coil is good and is trying to switch 12v to drive the horn.
Now is time to locate and replace the horn fuse or the relay may have bad contacts. Look at the other relay part numbers in the cluster and see if there is a match for the horn one. Swap it out and try the horn.
Hope this all helps. To 'test' the horn, touch the dim side again anf listen for a scratching sound. That is the 12v going thru the tiny bulb in the tester (a resistance) and trying to drive the horn.
Posted on Mar 27, 2009
you need three things, fuel, air, and spark. the fuel and air should be ok. Let's check the timing. Oh. are you sutre the firing order is right with the wires? Ok, they are,right? Now set the timing marks on front of engine to match up at 4 degrees after you bring #1 piston to top dead center.on compression stroke.you can tell when its on compression stroke by removing spark plug and bumping the starter untill the piece of tissue you put in the plug hole blows out.then once the timing marks are lined up,check what wire the rotor is pointing at. If its close to #1, turn distributor slowly either way untill you hear a spark jump or pop. Lay #1 plug wireon the engine with the spark plug stuck in it. When the spark pops, the plug will fire at the timing mark setting. put plug back in, minus the tissue, put the wire back on and sng doe your distributor. the firing order is casted on the intakke manifold. Like 18436572. Going around top of dis cap start at the wire you know is #1.and in the direction the distributor turns make sure wires are in that order on your manifold.don't forget to secure the distributor cap..I this distributor has points the dwell/gap will have to be set while running with an allen wrench and dwell meter.at32 degrees. No points,no ptoblem. no setting. button it all up and look around for loose anythings, especially tools on top of radiator and light it it up. Final timing should be set with a timimg light. Any problems , I'll be on the puter bot noon o clock my time. Good Luck.
Posted on May 13, 2009
tune up is likely what you need from description
Posted on Jun 15, 2010
Testimonial: "thanks for replying, thats what I thought too, but I have another question, I just added more comments to the prior comments, please read. thanks again. "
firing order of a small block chevy engine is 1-8-4-3-6-5-7-2, clockwise-#1 on the front driver side (1,3,5,7 on driver sied, 2,4,6,8 on passenger side)-#1 should be about the 7 o'clock position, but to be certain, rotate the crank (loclkwise) until the 0 degree mark on the balancer lines up with the scale-look at the installed rotor-it is either pointed at the 7 o'clock position or the o'clock position-with the plug in #1 removed, rotate it again to see if the cylinder pushes air (compression)-that is where #1 plug wire belongs. just plug them in in order (18436572)-you will still have to time it to start, they usually need to be set a few degrees before top dead center.
Posted on Feb 22, 2011
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