Classic Mustangs (Tech) Technical discussions about the Mustangs of yester-year.

a little help please.

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Old Feb 19, 2008 | 08:47 PM
  #1  
boogerschnot's Avatar
boogerschnot
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Joined: Feb 2007
Posts: 2,688
From: Ramona, CA
Default a little help please.

I borrowed my buddies dwel/tach meter a couple of days ago to get my idle down to around 700,, It was actually set way higher than I though it was, up at 1400rpm and would diesel some times when I would shut it off.. So I was able to get it down to about 850 but after that I had no more adjustment on my curb Idle screw. It was touching knothing, so how can i get it down a little more? And Im running a performer plus cam, but it seems to idle really rough,, the entire car vibrates (or convulses)when Im at Idle.. How Can i smooth that out? I adjusted the mixture screws a little further out to get it to idle at 850, otherwise it would not, it would just die. And I adjusted the timing just a tad also to the smoothest running spot at 850rpm. I also opened up the choke to fully open since it was a operating temperature.. Is there anything else I need to do to the choke to get it adjusted correctly for those cold days? And I guess I really need a timing light. Any suggestions on how to tame this jumpy beast?

Otherwise It runs great.. I do feel like I may have messed up my break in though.. I drive it about 10 minutes to andfrom work at about 70mph,, and that has been most of my break in, I try to slow and speed up in bursts on the highway on the ride though.. I still havea good bit of mist coming up out of the valve cover breathers.. Is 350 miles too late to seat the rings by nailing it a few times?? Ive been getting on her, particularly going up hill for the extra load.. But it seems that she should not be breathing out of the valve covers like she is.. Let me know if it sounds fishy to you?

Thanks guys.
Old Feb 20, 2008 | 10:31 PM
  #2  
Scott H.'s Avatar
Scott H.
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Default RE: a little help please.

.....

Last edited by Scott H.; Jan 18, 2010 at 09:02 PM.
Old Feb 20, 2008 | 10:42 PM
  #3  
fast66's Avatar
fast66
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Joined: Sep 2005
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From:
Default RE: a little help please.

You havent mentioned if you are running points distributor. If you nare, you should also set your dwell (points gap) I tend to do a double round of adjustments.
I set the Idles speed... then
Timing...then
Dwell....then
Idle speed...then
Timing... then
Dwell.
This will give you your best timing tune. If after all this you cant get it to idle, you will need to look more at the carby.
If you have an electronicdizzy or petronics, then forget the dwell, just set idle and timing.
Cheers
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