need help trouble shooting
#2504922
06/05/18 06:26 PM
06/05/18 06:26 PM
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Joined: Nov 2012
Posts: 145
jeff500
OP
member
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OP
member
Joined: Nov 2012
Posts: 145
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Bought a 83 diplomat. Someone deleted the lean burn and used a points dist.car runs like it's only hitting on 2 cylinders at idle but seems to smooth out under acceleration. I wired a electronic dist up and still get the same thing.new plugs,wires, cap and rotor,timing set @ 7 btdc. I thought maybe the 2bl carb was bad and installed a 4bl intake and carb and have the same issue. I'm way over it and hopefully someone can school me on this.lol
Last edited by jeff500; 06/05/18 06:29 PM.
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Re: need help trouble shooting
[Re: jeff500]
#2504975
06/05/18 08:42 PM
06/05/18 08:42 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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I think stumpy is saying you need more initial timing. Not more total timing. But I don't want to speak for him. I may be wrong.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: need help trouble shooting
[Re: jeff500]
#2505013
06/05/18 10:56 PM
06/05/18 10:56 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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I'd set the initial at least at 15 & maybe 20 then shorten the slots with the $25 FBO plate (to 35 total, initial+slots). what springs are in there? I'm assuming you are on ported/vac adv operational. & we gotta solve the poor idle, I'd start with a basic compression test/idle vacuum. EDIT I saw your 2nd post, bump up the timing/lower the idle speed.
Last edited by RapidRobert; 06/05/18 10:57 PM.
live every 24 hour block of time like it's your last day on earth
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Re: need help trouble shooting
[Re: jeff500]
#2505393
06/06/18 10:16 PM
06/06/18 10:16 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
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Posts: 36,041
Lincoln Nebraska
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Won't it be running to much total timing and ping. This is a bone stock 318 No, the $25 plate will allow you to reduce the slots so you can have 35 total. What springs are in there & we can work with them. I think you will be fine with 20 & if it cranks slowly when hot then go back to 15. Initial then total to 35 then work with springs (more on that later) then plug in/adj the can
live every 24 hour block of time like it's your last day on earth
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Re: need help trouble shooting
[Re: jeff500]
#2505521
06/07/18 10:43 AM
06/07/18 10:43 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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It shakes and chugs all the way to high speeds. I'm trying to think what that might be & for sure it needs to be dealt with before setting the dist subsystems.
live every 24 hour block of time like it's your last day on earth
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Re: need help trouble shooting
[Re: jeff500]
#2505663
06/07/18 05:59 PM
06/07/18 05:59 PM
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Joined: May 2003
Posts: 15,487 Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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troubleshooting 101
always start with a comp test in each cyl, cranking with carb wide open, all plugs removed.
since the timing mark is steady and if everything checks ok on the IGN.
I wager it is a wiped cam lobe/lifter.
Last edited by scratchnfotraction; 06/07/18 06:01 PM.
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Re: need help trouble shooting
[Re: jeff500]
#2506072
06/08/18 10:01 PM
06/08/18 10:01 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Actually on the Rotor Phasing you would want the rotor close to the trailing (far) edge of a cap terminal with a reluctor tooth lined up dead center with the magnet as the can will shift it back CCW (on a SB). This is with the rotor retracted all the way CCW which the springs will/should be doing. turn the crank with a 1&1/4" socket/breaker bar. Holler how the compression test goes. EDIT tho I dont think the phasing would be off on both of em (points/electronic). Holler with any new developments.
Last edited by RapidRobert; 06/09/18 01:55 AM.
live every 24 hour block of time like it's your last day on earth
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