Timing issue

[blacknight80]

Hey guys

I finally figured out my injector pulse problem and it's getting closer to running (after a year or more.....) but I can't seem to get the cam sensor in right. When I crank it acts like the timing is way off. It cranks easy a few times and then cough and back fires. I reinstalled it a few times but I'm getting sick of ripping off the coil pack to find out I did it wrong again. Could It be anything else? I have fuel and spark just at the wrong time. Thanks

 

[crashedout1]

Cam senser setting tool is a good investment. Did you use timing tape on the harmonic balancer? Are you sure your at top dead center on the compression stroke?

 

[blacknight80]

Ya I measured it out, stuck it to the balancer and drew it on with a paint marker. In pretty sure I'm at tds. I used a vac/compression gauge in plug 1. I rotate it until the compression turns into a vac. The factory mark on the balancer lines up with 0 deg. I think that's right isn't it? I used a voltmeter and back probed the cs weather pack and get 6.95 volts. I rotate it clockwise until it drops to zero and lock it in. I don't get anything lower than .33 volts at the lowest point though. I tried two caps one used and one brand new.

 

[bison]

Ya I measured it out, stuck it to the balancer and drew it on with a paint marker. In pretty sure I'm at tds. I used a vac/compression gauge in plug 1. I rotate it until the compression turns into a vac. The factory mark on the balancer lines up with 0 deg. I think that's right isn't it? I used a voltmeter and back probed the cs weather pack and get 6.95 volts. I rotate it clockwise until it drops to zero and lock it in. I don't get anything lower than .33 volts at the lowest point though. I tried two caps one used and one brand new.

You turn counterclockwise till it drops. You're on the wrong side of the window


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[blacknight80]

It should only be 0 volts once per rotation right? Without turning the crank that is.

 

[blacknight80]

 

[bison]

It's zero at the window. You are on the wrong side of the window


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[blacknight80]

Is my drawing how it works? If that the case would it matter where you drop the body in? Would it only matter where the cap is located on the reluctor?

 

[blacknight80]

O I got you so I want to make sure the cap starts counter clockwise from the window and turn it clockwise towards the window until the voltage drops?

 

[bison]

The position of the window relative cap if the crank is in the right spot. Which is 25* atdc compression. So it's actually in the power stroke. It's not even a precise setting. You can be off buy several degrees with no effect.


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[blacknight80]

Ok I'm pretty sure I'm 25 atdc. I seen two different sets of instructions to install one said have the dot on the gear point towards the ps fender and the other said have it point at 3 o'clock if you were looking from the front. These is irrelevant then? As long as the I have the cap in the right spot (0 volts)? Thanks for your patience I'm a carb distributor kind of guy lol.

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[bison]

Ok I'm pretty sure I'm 25 atdc. I seen two different sets of instructions to install one said have the dot on the gear point towards the ps fender and the other said have it point at 3 o'clock if you were looking from the front. These is irrelevant then? As long as the I have the cap in the right spot (0 volts)? Thanks for your patience I'm a carb distributor kind of guy lol.

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Re-read my post about the wrong side of the window. Think carefully about this. The entire window is zero volts.


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[blacknight80]

I'm picking up what your putting down now. Thanks.

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[blacknight80]

I reset it again amd it's a little smoother cranking. Here's a few videos of what it's doing. The battery got a little weak towards the end.

 

[bison]

If that's an aftermarket cap you need to follow the instructions that go with it!


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[blacknight80]

I don't have any instructions. One cap was on the sensor and the other came in a blue plastic package with the rest of the 85 parts to do the swap. I'm fairly confident i have the cam sensor set correctly. I followed a good video on YouTube and triple checked it. These are basic caps with no lights on them. If a cap has failed does it die completely? Thanks again for the continued help you have no idea how much I appreciate it.

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[bison]

I don't have any instructions. One cap was on the sensor and the other came in a blue plastic package with the rest of the 85 parts to do the swap. I'm fairly confident i have the cam sensor set correctly. I followed a good video on YouTube and triple checked it. These are basic caps with no lights on them. If a cap has failed does it die completely? Thanks again for the continued help you have no idea how much I appreciate it.

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If using a standard cap and get to the edge of the window while turning counterclockwise at 25* atdc compression then you should have success every time. If a stock dimension balancer then the mark needs to trail the timing mark about 1.45". Setting this easy gets the cam sync around 80 degrees and works every time.


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[bison]

If you're sure the cam sensor is correct then you have the firing order wrong


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[blacknight80]

I've got type ii ignition I better have a look at it tonight and check my plug wires. Measured 1.45 and marked it on the stock balancer counter clockwise from the stock mark.

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[crashedout1]

I also heard you can ruin the ignition cranking the engine with a plug out to check for spark . Thats if the spark plug isnt grounded properly. Maybe someone could verify this.