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Old 07-01-2001, 08:43 AM
Spanky Spanky is offline
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Join Date: Apr 2000
Location: Dexter,Mo. USA
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Default Distributer springs

I have a 69 340 dart mopar elect ign. edlebrock carb torker intake. Everything is working well except for the idle. It will either idle at 750 or 1400 rpm. if i set the idle where it idle at 1400 and then back off the screw even a 1/4 turn it will stay at 1400 for a minuite the fall all the way to 750. I think I would change the springs on the advance but they don't seem to be availible. any suggestions on where to get the springs or what the problem really is?
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Old 07-01-2001, 10:49 AM
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rumblefish360 rumblefish360 is offline
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I purchased my springs from the MoPar dealer down the block. Came in about 3 days. Try Summit racing or Jegs for them.
I don't know if it will solve the problem for you.
What size carb and cam are you running? It my sound lame but, is the carb clean? Idle slots clear? It can be a few things. Hard to figure out on the net.
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Old 07-01-2001, 12:19 PM
diesel diesel is offline
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Join Date: Jan 2001
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Default springs

I went to the local speed shop ang picked up a chevy advace kit $5.00 The springs are the same but theres a asortment in the kit. my Road Runner would gain RPMs at 1500 and run lousy at low end. It was the problem!
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Old 07-01-2001, 01:13 PM
beepbeepsrule beepbeepsrule is offline
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Has your distributor's advance curve been modified already? Too light of springs (or no springs as in broken or fallen off) for the weights inside the distributor won't keep the weights from moving out too soon. This will cause your idle to go higher as they advance then when you run the idle screw back down the weights pull back in, you lose timing advance and the idle goes way back down and usually dies. If your engine is cammed up then you want the springs to keep the weights in until 1200 rpm or so on a street car so you can get the carb to idle at 900-1000rpm to keep the cam happy. Here is a post from the "Mopar elect Dist?" thread a few pages back:

"Regarding the timing curve and modifying the weight springs: If the timing does not change from 3000 to 4000 rpm then you can probably assume all the timing is in by 3000. Check it at 2000, you will want it ALL in by then. The springs I have the best results from are from MR Gasket* I think, and they are for a Ford distributor! Both springs are identical in tension, and they have slightly larger holes and are easier to install. They make for a very even timing curve and allow full advance at right at 2000-2200 rpm. They also have just enough tension to keep the weights pulled back at 800-1000 rpm. This is good for a cammed up motor that must idle a little higher than a stocker, the weights aren't starting to move until about 1200 rpm. Makes it easy to check initial advance plus it will idle smoother when the weights aren't jumping around.

*Found my extra set of those springs. The brand is TransDapt. Their part number is 4451. The description is "Distributor Advance Curve Kit -- Late Ford 1965-1970". "
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