How to Replace Ignition Coil 1974-87 Chevy Camaro PART 2

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This is part two of performing an ignition system tune up on this 1986 Camaro Iroc-Z, pretty much the same as any '82 to '92 Camaro or Firebird with either a 305 or 350 V8. Once again, the tools you'll need are tape and marker, jack and jack stands, T20 Torx driver, 1/4 inch socket with ratchet and extensions and small flat blade screwdriver.

We had left off part one and we had put the coil back on and the cover. Now we're just going to take the new bolts that come with the distributor cap and force them into the cap and thread them in. Once you do that they won't fall out, they are just in there, so that when you put the cap in, it's much easier that you don't want to try and thread these while you are underneath the hood.

Now, our cap has a little guide tooth right here so it will only go onto the distributor correctly one way. Now we're going to install the cap onto the vehicle. Just basically start it in the same position that we know that all the connectors were over towards the driver's side, put it down in and make sure you don't pinch any wires between the cap and distributor housing. Then, press it down and try and spin it back and forth and that guide tab and groove will come together. I'm going to fast forward here as, first, I start all those 1/4 inch bolts and with a two inch extension, then, tighten them up. When you tighten them, you want to be very careful, you want to make them snug, but you don't want to over tighten them, which could crack the cap and then cause running problems. Now I'll just switch over to the longer extension and do that bolt near the injection. Now here, it's a little hard to see but I am plugging leads back in. You want to first plug the black lead, which is the dual prong that goes towards the inside of the distributor cap, plug that in, and then you plug in the other two leads. On this vehicle, the darker lead goes towards the front and then the lighter lead goes towards the back.

Now, what I've done is, I've taken and laid out my distributor cap with my old wires still on it. You can see I've got this one labeled eight, so I matched up the wire the same length, I label it down near the engine side as number eight and I did that for all the wires. The reason I label it down near the engine side is because you're going to stuff those down through the engine and then get underneath and you want to be able to see the labels clearly. You'll notice I also marked both sides. For example, this is sitting pretty much the way it is in the car. I'll do this one first, which is right next to where everything plugs into the coil. So this is number two. So I'll just take number two and I'll plug it into the same position here. I actually have it around back. It's going to want to go around front here. Then, number two comes around here, and just keep repeating that. This is number seven, on the other side of the coil input. Then I'll just repeat that for all of ours. Rather than watching me route them, I'm just going to do a series of still photos here to show you how to route the wires correctly. In this photo, the yellow arrow is pointing to the number eight wire. This is this passenger's side of the motor so that wire just runs down by itself, the back of the engine and then hooks to the number eight spark plug. Then for the two red arrows, the upper one just shows you where the route, the lower one is another clip that attaches to the engine and then those three wires go down and go to their respective cylinders. Now, here, in this video, see the yellow wire. This is just the driver's side and right above there, I believe is the brake master cylinder. So all four wires just go down the back of the engine and between the two wiring harnesses. Now, looking from below, you can see on the bottom right hand corner, that's the oil filter and there is the clip that hooks onto a little bracket on the engine, it holds all four wires as they come down. You can see the red arrow points to the number seven wire, it goes right to its plug there and then the yellow arrow points to that clip. The number seven wire is hooked up to its spark plug and then the three other wires continue down and they hook into a clip that's on the side of the engine, that's noted by that red arrow right there. In this shot, we're looking at the passenger's side from the front of the car. We're looking up at the number two spark plug, noted by the red arrow. Then the green arrow is pointing actually to the number four wire and what that wire does is it comes forward and then loops around and back to the spark plug.

Now, we'll speed through just putting that cover back over the distributor, with the three T20 Torx screws.

Now, reconnect the battery.

Now, we'll do a little test, start the engine up. It ran a little rough at first probably more due to the fuel system but everything seems to be working well.

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