engine run-on
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New User
Joined: Oct 2011
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From: queensland
engine run-on
anyone had problems with engine run-on. i'm having problems with run-on after engine is turned off and a bad smell after this occurs,from excess fuel burning i would think. the timing seems to be right and it seems to only happen after it gets hot. is there any solution. I'm not to mechanical minded but willing to have a go. sorry its a 351 cleveland with new holley carb, but was doing it with old thermoquad.
Elder User
Joined: Apr 2009
Posts: 725
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What's the timing set at?
What is your Idle speed (in neutral w/manual trans, P w/auto trans)
Did you set timing with a light, vacuum gauge, or by ear?
Is it hard to start? while hot? while cold?
How is your vacuum advance hooked up, if at all?
What is your Idle speed (in neutral w/manual trans, P w/auto trans)
Did you set timing with a light, vacuum gauge, or by ear?
Is it hard to start? while hot? while cold?
How is your vacuum advance hooked up, if at all?
Thread Starter
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New User
Joined: Oct 2011
Posts: 13
Likes: 0
From: queensland
thanks for replies, i set the timing to 6 degrees before top dead centre with auto in neutral with vacum line to elect dizzy off carb with a timing light. i think idle speed sits around 750 but it fluctuates on this. it it hard to start when hot only sometimes which i think is starter motor problem as i can tap the starter and she fires. just have to invest in new one. i will have a look at idle speed when i get a chance. does the vacum unit on the dizzy need replacing. i have just bought a new manifold for it so i will pull all this gear out soon. migh buy a new dizzy and coil while i am at it.
Elder User
Joined: Apr 2009
Posts: 725
Likes: 2
idle speed while in D holding the brake should be around 550rpm. Which should put it right about where you have it now in N.
Is the vacuum advanced hooked to Full manifold vacuum or Ported Vacuum?
Is the vacuum advanced hooked to Full manifold vacuum or Ported Vacuum?
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Post Fiend
Joined: Dec 2007
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From: Lost
750 is a bit high. If you have to keep it turned up that much to prevent it dying in gear, then you need to turn the key off while still in gear, then place into park.
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