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Timing, fuel delivery vacuum leak?? |
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75Cj5
AMC Apprentice Joined: Apr/05/2021 Location: Decatur, Tx. Status: Offline Points: 60 |
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Edited by 75Cj5 - Apr/12/2021 at 1:33pm |
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iapexl8r
AMC Addicted Joined: Apr/13/2008 Location: north idaho Status: Offline Points: 639 |
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bass boat mentioned the power valve. this may be a problem, but most newer (as of 1995) have have power valve protection built in them. once you get the motor to idle, you can time the motor to total mechanical advance. assuming you have a timing light with an adjustment for advance.. to do this you would dial in 32 deg (thats what I would do for your set up) ) on the timing light, run the rpms up until the mark in the harmonic balancer stops moving and then rotate the dist to line up the harmonic balancer mark to the zero mark on the timing chain cover . basically what you are doing is opening up the flyweights in the dist via centrifugal force and setting the timing there. then take not of where you started timing at idle. on another note how much are the timing marks moving around at idle?
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75Cj5
AMC Apprentice Joined: Apr/05/2021 Location: Decatur, Tx. Status: Offline Points: 60 |
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I am using an Innova inductive timing light.... Should I look at upgrading this? The DUI Distributor manufacture recommended finding an older dial in timing light. Any time I could ever get the engine to run smooth and perform close to normal the timing mark would hit very consistent at idle, HOWEVER, also at idle the mark would be at approximately the 8 O'clock position as if you were standing directly in front of the balancer facing it.
Edited by 75Cj5 - Apr/12/2021 at 1:33pm |
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75Cj5
AMC Apprentice Joined: Apr/05/2021 Location: Decatur, Tx. Status: Offline Points: 60 |
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Talking about the power valve reminded me of something that might be very key in this... Sorry this is just coming to mind...
when the engine idles it pops through the carb, if I am able to bring up the RPM's the popping will reduce and subside until it is brought back to idle.
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PacerLarry
AMC Apprentice Joined: Aug/02/2010 Location: New Lenox, IL Status: Offline Points: 103 |
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Just a thought, are you hooking the timing light up to the #1 wire (drivers side) and not #2 by mistake?
#2 fires just before #1 and the timing light would indicate a lot of advance when the motor is running smoothly like you said was happening.
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iapexl8r
AMC Addicted Joined: Apr/13/2008 Location: north idaho Status: Offline Points: 639 |
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The Inova timing light comes in many different varieties, if yours has a dial or a digital screen, it is fine. If it has neither you will probably need to upgrade
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PHAT69AMX
AMC Addicted Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5919 |
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Triple check and make absolutely sure Plug Wires #5 & #7 are not crossed or swapped at the plugs and/or at the cap... I did it more than once... .
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75Cj5
AMC Apprentice Joined: Apr/05/2021 Location: Decatur, Tx. Status: Offline Points: 60 |
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I have it on the driver side front plug wire, and trying to keep it clear of the other wires as well.
Edited by 75Cj5 - Apr/12/2021 at 1:33pm |
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75Cj5
AMC Apprentice Joined: Apr/05/2021 Location: Decatur, Tx. Status: Offline Points: 60 |
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Ok, mine just has the on/off button.
Edited by 75Cj5 - Apr/12/2021 at 1:34pm |
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75Cj5
AMC Apprentice Joined: Apr/05/2021 Location: Decatur, Tx. Status: Offline Points: 60 |
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Will do Sir. Just to confirm, my manual shows this as the firing order: 1-8-4-3-6-5-7-2 Fire wall / back 8 7 6 5 4 3 2 1 distributor cap / front
Edited by 75Cj5 - Apr/12/2021 at 1:34pm |
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