Is it possble to be 180 degrees off timing??? - Ford Mustang Forum
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post #1 of 17 (permalink) Old 09-20-2010 Thread Starter
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Is it possble to be 180 degrees off timing???

I have a 1985 mustang and I think the timing may be off at least 90 degrees if it's possible. When I use the timing light, the number aren't there, but instead under the water pump. I have a new harmonic balancer; could it be that it was installed wrong, in the wrong position?
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post #2 of 17 (permalink) Old 09-20-2010
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Yes its very possible.......
post #3 of 17 (permalink) Old 09-20-2010 Thread Starter
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How can I correct it? I made sure the #1 piston was in compression but taking out the spark plug and putting my thumb in the hole and having someone crank for a second and right when it was in compression I put the rotor to number 1. What do I do? Could it be the harmonic balancer?
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post #4 of 17 (permalink) Old 09-20-2010
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Try reseting the dizzy one more time it could be a tooth off or 180 out. the harmonic balancer should only go on one way since the crank has a key way.
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post #5 of 17 (permalink) Old 09-20-2010
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If you are 180 off on the timing, the engine will only backfire when you attempt to start it. If its running, then its not 180 off. Isn't the Harmonic Balancer keyed so as to make installing it wrong impossible? Are you sure your timing light is being triggered on the correct cylinder? Does the light have a timing adjustment knob on it which may be "adjusted".

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post #6 of 17 (permalink) Old 09-20-2010 Thread Starter
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So the harmonic balancer can only go in one way? I wouldn't really know, I didn't install it. ok so then it has to be the distributor. In that case, I have no idea how to fix it. It runs. If I move the distributor while it's running a little to the left, it almost shuts off, and the same thing happens for the right. So the only thing it could be is that it has to be really far off.
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post #7 of 17 (permalink) Old 09-20-2010 Thread Starter
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I noticed, though, that the rotor turns twice for complete cycle of the engine. So does that mean that the spark plug sparks in the exhaust cycle too? Maybe it's 180 degrees off or so. I'm not really sure anymore.
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post #8 of 17 (permalink) Old 09-20-2010 Thread Starter
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Quote:
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If you are 180 off on the timing, the engine will only backfire when you attempt to start it. If its running, then its not 180 off. Isn't the Harmonic Balancer keyed so as to make installing it wrong impossible? Are you sure your timing light is being triggered on the correct cylinder? Does the light have a timing adjustment knob on it which may be "adjusted".
No I have the cheaper induction timing light, not the digital one, but shouldn't it work fine for this application? Maybe you're right. I don't know but something isn't right.
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post #9 of 17 (permalink) Old 09-20-2010 Thread Starter
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How can I find out what's wrong with the timing? Anyone have any other ideas? If the car runs, why isn't the harmonic balancer in the right spot when the number 1 cylinder fires?
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I noticed, though, that the rotor turns twice for complete cycle of the engine. So does that mean that the spark plug sparks in the exhaust cycle too? Maybe it's 180 degrees off or so. I'm not really sure anymore.
Distributors and camshafts spin at half the speed of the engine.
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post #11 of 17 (permalink) Old 09-20-2010 Thread Starter
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Distributors and camshafts spin at half the speed of the engine.
Well that makes sense.
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It's one of those situations where its kinda hard to fix fromthe other end, make sure your # 1 is at TDC on the compression stroke and the cylinder #1 is the front left cylinder looking at the engine, pull the cap off and see if the rotor is pointing to the #1 terminal on the cap. If not try and lift the distributor out and move the distributor gear to the next tooth and set it back down. you might be a tooth out.
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Quote:
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How can I find out what's wrong with the timing? Anyone have any other ideas? If the car runs, why isn't the harmonic balancer in the right spot when the number 1 cylinder fires?
Is it an aftermarket harmonic balancer? Did a new timing pointer come with it and was this installed correctly?
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post #14 of 17 (permalink) Old 09-20-2010 Thread Starter
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Is it an aftermarket harmonic balancer? Did a new timing pointer come with it and was this installed correctly?
To tell you the truth, I have no idea about any of that. My mechanic did that and I don't even have a timing marker on it. I'm going to ask him and research it too. I just know that the numbers are no where near where they should be.
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post #15 of 17 (permalink) Old 09-21-2010 Thread Starter
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I have already tried everything but the harmonic balancer is still off. I already set the engine to compression for the number 1 cylinder and set the rotor to number 1. When I do that, the numbers on the harmonic balancer end up under the water pump, way too far to be even close. If I move the distributor while it's running, the car will almost shut off when I move it in either direction. What the heck is going on?
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