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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Now new engine wot run right :(

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Old Mar 24, 2010 | 06:25 PM
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Now new engine wot run right :(

ok I jsut installed a new, reman, 4.9L 300 in my 82. Im having trouble getting the thing to idle down....sounds to be running at to highg an RPM just sitting there and also its dieseling when I try nad shut it off it just keeps trying to run. heck this last time I had to pull the man. choke out and flood it out to stop it. hwepl please.


any Ideas mods should be in sig.
 
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Old Mar 24, 2010 | 06:29 PM
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You have forgotten and left off a vacuum line somewhere. The engine is getting air from somewhere it's not supposed to.
 
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Old Mar 24, 2010 | 06:30 PM
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From: utica il
you might have put the distributor in wrong either 180* off or something to that effect
 
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Old Mar 24, 2010 | 07:16 PM
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no now that I think about it I'm going to get a propane torch and find the vac leak. my bet is the stupid intake exhaust manifold is screwed up had a bugger of a time hoking it nad the exhaust up. I'm betting thats me problem.

BIG THANKS THOUGH GUYS!!!
 
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Old Mar 24, 2010 | 07:32 PM
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My first guess was timing, but if Dave says vacuum leak, he is probably right.
 
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Old Mar 24, 2010 | 07:46 PM
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vaccum leak on a carb'ed engine will make a low idle, unless it was running rich before the leak, I'd check the fast idle or just try to adjust the idle speed down.
 
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Old Mar 24, 2010 | 07:51 PM
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From: utica il
i'm thinking dizzy is one tooth off
 
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Old Mar 25, 2010 | 12:13 AM
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Originally Posted by fatdan460
i'm thinking dizzy is one tooth off

how do I go about checking that? and then fixing that.


also:

as for the idle right now I think I have the timning really advanced. I have the Dissy turned so far teh vac advance is touching the tappit cover. Just so you dont think I think that is right it just lines up the timing mark there. If I could I would trun it farther. to line it up better at 6*btdc so I know something is WRONG WRONG WRONG.

Also this truck has EFI manifolds. AN Offy C necked down to a 2100 wiht 1.14 ventuies and the EGR system totally deleted.
 
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Old Mar 25, 2010 | 01:13 AM
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Originally Posted by bashby
vaccum leak on a carb'ed engine will make a low idle, unless it was running rich before the leak, I'd check the fast idle or just try to adjust the idle speed down.

I have the idle screw backed out almost the whole way. How do I adjust the fast idle on a 2100 autolite wiht a manual tans and manual choke? I thought I only had curb idle adjustments
 
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Old Mar 25, 2010 | 02:15 AM
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Don't worry about the high idle until you have the distributor retimed - being over-advanced is going to increase your idle speed a lot
 
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Old Mar 25, 2010 | 02:25 AM
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Originally Posted by Ken Blythen
Don't worry about the high idle until you have the distributor retimed - being over-advanced is going to increase your idle speed a lot

thats what I figured but figured I had better ask.

SO first things first a new manifold gasket tomorrow......WOOO HOO Im sick of those things LOL


I did jsut order a Walker downpipe #45166 so that should make hooking it up way easier LOL
 
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