distributor parts

Let me go at this another way. This is a 59' 361 v8 FE engine all factory as near as I can tell with 99000 on the clock. I have a bobble or hesitation around 1800 to2000 rpm when just coming on the throttle around curves or in traffic. Sometimes it seems enough to pop back like a timing issue. I have replaced all new parts except for the distributor itself and the ballast resistor which reads 2.7 ohms but am replacing it today. I have set the advance with the vacuum off at 10% instead of 6. With a timing light, it all looks like it is working. I took my distributor apart this weekend to clean and lube it. The advance weight springs are two different sizes. I would have thought they would be both the same. Other than that, it looked factory albeit dirty. Could this be a factory curve or has someone messed with the curve and put two different size springs in it?

Thanks in advance
 
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If it pops out of the carburetor, it could be an accelerator pump issue or other issue with the carb. Look for two good squirts as soon as you touch the throttle slightly (engine off).

Sal
 
I did and they seem good. I even moved the pump lever up one notch with no noticeable change. The carb was rebuilt last year. Other than that, it runs very well and idles good. The problem is intermittent and is driving me nutz and that's not far to go =[.
 
SuperDave said:
I think it's common to use two different springs to extend the advance curve..
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Two different springs sounds very familiar.

wbedwards said:
..... I have replaced all new parts except for the distributor itself and the ballast resistor which reads 2.7 ohms but am replacing it today.
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I have 4 ballast resistors and measured them all.
Three of them measured at 1.6 to 1.8 and the other one at 2.1 ohms.

Probably not related to your problem but good to check.... A dwell meter on the points while the engine is running shouldn't vary more than 5 degrees.
 
Thanks guys, the new ballast resistor measured 2.8 ohms and didn't make a bit of difference. With the car running I am getting just under 10 volts on the coil. I checked the points with a dwell meter after I gapped them.
I think its a timing issue. I had it on 10%. If I drop it back to 6% it gets worse. Its not very technical, but tonight, I did like I used to years ago and ran the timing up till I got a ping driving it, then dropped it back till the ping went away. The random miss has gone away and it seems to be running much better. I double checked with a light but the markings are not clean and clear. I will clean them up another night and give you an idea of where the timing is now.

don't flame me, it worked =]
 
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