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Installed e303 cam and it won’t start

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Old Dec 31, 2024 | 04:18 PM
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Installed e303 cam and it won’t start

I installed a e303 cam on my 1986 f-150 5.0 motor. And it won’t start it just spins and smells like gas . And I checked the timing twice to see if it’s 180 out but still doesn’t start has spark and fuel.
 
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Old Dec 31, 2024 | 04:30 PM
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When you put the distributor back in, where was the rotor pointing?

Is this thing carbed or EFI?
 
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Old Dec 31, 2024 | 04:32 PM
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Originally Posted by Scndsin
When you put the distributor back in, where was the rotor pointing?

Is this thing carbed or EFI?
It is EFI and the distributor was pointing the first piston after I put it on 0
 
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Old Dec 31, 2024 | 04:34 PM
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And you have the plugs wired for the HO firing order?
 
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Old Dec 31, 2024 | 04:37 PM
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Originally Posted by Conanski
And you have the plugs wired for the HO firing order?
Well I put it in 1-3-7-2-6-5-4-8 from what I looked up
 
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Old Dec 31, 2024 | 05:51 PM
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Originally Posted by Santiago20
It is EFI and the distributor was pointing the first piston after I put it on 0
That could be the problem.


As you may know, # 1 on the cap is pointing toward cylinder 7. It sounds like you have the rotor somewhere between 2 & 6 on the cap.
 
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Old Dec 31, 2024 | 06:37 PM
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So do I put the firing order to the picture shown . Because I put it on zero . And it was pointing to the 2-3 piston do you think the e-303 can affects the timing?
 

Last edited by Santiago20; Dec 31, 2024 at 06:39 PM.
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Old Dec 31, 2024 | 07:15 PM
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Originally Posted by Santiago20
So do I put the firing order to the picture shown . Because I put it on zero . And it was pointing to the 2-3 piston do you think the e-303 can affects the timing?
Yes? What picture are you asking about? As I already stated, the rotor needs to point at #1 on the cap. If it is point between cylinders 2 & 3 then you are off by two terminals.
 
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Old Dec 31, 2024 | 07:38 PM
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Originally Posted by Santiago20
So do I put the firing order to the picture shown . Because I put it on zero . And it was pointing to the 2-3 piston do you think the e-303 can affects the timing?
because I had a different timing on my truck like the image below

 
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Old Dec 31, 2024 | 09:26 PM
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Originally Posted by Santiago20
Because I put it on zero . And it was pointing to the 2-3 piston
That means the distributor is incorrectly installed.
First bring piston #1 to TDC on the compression stroke... air will be pushed out the spark plug hole as the piston comes up. It is important to ensure you are on the compression stroke not the exhaust stroke.
Then insert the distributor so that the rotor points a the #1 post on the cap when fully seated. This may take several tries since the rotor turns as the drive gear engages the cam but it's has to be right.

With that done the motor should fire up, you still have to set base timing but it's easier to do that with some temperature in the motor.
 
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Old Jan 1, 2025 | 12:28 AM
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My contribution is that when you installed the distributor @ TDC....

#1 is always the same regardless of firing order.

It should point (drop in) roughly in the direction of the front, passenger side bolt of the upper/lower intake.
 
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Old Jan 1, 2025 | 11:25 AM
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Originally Posted by Conanski
That means the distributor is incorrectly installed.
First bring piston #1 to TDC on the compression stroke... air will be pushed out the spark plug hole as the piston comes up. It is important to ensure you are on the compression stroke not the exhaust stroke.
Then insert the distributor so that the rotor points a the #1 post on the cap when fully seated. This may take several tries since the rotor turns as the drive gear engages the cam but it's has to be right.

With that done the motor should fire up, you still have to set base timing but it's easier to do that with some temperature in the motor.
okay thank you I will try that . Hopefully it works
 
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Old Jan 2, 2025 | 12:55 PM
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Yeah it didn’t work it just sounds like it wants to start I was just wondering if anyone knew if it’s because I put a e303 cam on it and made it a roller block
 
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Old Jan 2, 2025 | 01:20 PM
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Originally Posted by Conanski
That means the distributor is incorrectly installed.
First bring piston #1 to TDC on the compression stroke... air will be pushed out the spark plug hole as the piston comes up. It is important to ensure you are on the compression stroke not the exhaust stroke.
Then insert the distributor so that the rotor points a the #1 post on the cap when fully seated. This may take several tries since the rotor turns as the drive gear engages the cam but it's has to be right.

With that done the motor should fire up, you still have to set base timing but it's easier to do that with some temperature in the motor.
Yeah it didn’t work it just sounds like it wants to start I was just wondering if anyone knew if it’s because I put a e303 cam on it and made it a roller block
 
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Old Jan 2, 2025 | 02:29 PM
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Originally Posted by Santiago20
Yeah it didn’t work it just sounds like it wants to start I was just wondering if anyone knew if it’s because I put a e303 cam on it and made it a roller block
Absolutely not. You still have something wrong. Carb or EFI it should still start. I have a feeling that the speed density computer isn’t going to like that camshaft.
 
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