Did I ruin my DSII?

[mr.mustang]

Last weekend I decided to recurve my DSII with the Mr. Gasket kit ( I also replaced cover on the head don't think thats relevant), I install one of the spring and it would not run on low idle and it would eventually stall out, so i figured i replaced the wrong spring so I replaced it and changed the other. this time i got it running but it stalled out when placing it in gear. Note I was adjusting the timing. So i decided to put the old spring back like it was and it did the same thing, it stalled out when in placed into gear. I read many other post so this is what I have done so far. IN the dsII there is a tab that hold the plate that turns when the vacuum engages, initially it was bent in preventing the vacuum to engaged so i bent the tab up and now the vacuum engages. So I check the transmission modulator (auto) and it was fine. i have a hw 5200 which i now took off and it was clean. I also reset the timing and the car starts right up with no problem. I only have three vacuum lines in the car 1st is from the DSII to the carb which when I take it off the RPM goes down dramatically, then I have the PVC which does not do anything if I unplug it, and finally the vacuum in the transmission that goes to the intake (have not checked it but superficially looks fine). I got the car to drive when I set the idle speed up (very high) but I have not been able to do it again. Also when I place it in drive on low rpm it jerks while on high rpm it does not but still stalls. Sorry for the long post but I need help and you guys have helped me in the past. Thanks

 

[FalconSedanDelivery]

Doubt if you ruined anything , but you sure as heck didn't recurve it either , I post here about this subject and although , with the correct tools AND KNOWLEDGE , anyone could do it , most have no clue , changing springs is NOT, recurving , I do it as a side line at my shop ( since 1976 ) , I have recurved Hundreds of Dist's over the years, reading a sticky or web page , does not give you the experience to know WHY , your doing something , it just tells you how , and the Why is the Experience factor that 15 min of reading will never give , now to try and help , pm me and perhaps I can talk to you and help , I cant type an answer here http://www.network54.com/Forum/74182/ it would take too much time and space, If you ( or anyone reading this ) doubts my knowledge of the subject , Faron Rhoads , or even google me.

 

[Lazy JW]

...... I only have three vacuum lines in the car 1st is from the DSII to the carb which when I take it off the RPM goes down dramatically......

This makes me wonder if this vacuum line may possibly be connected to manifold vacuum rather than the proper ported vacuum connection on the carburetor.

Changing springs and/or weights most certainly does alter the advance curve; whether it is correct for the engine is another matter entirely.
Joe

 

[JackFish]

I would suggest that perhaps the dizzy is not being re-installed in the same location from which it was pulled.
Maybe off a tooth?

 

[powerband]

I would suggest that perhaps the dizzy is not being re-installed in the same location from which it was pulled.
Maybe off a tooth?

Yeah, doubt the DSII is ruined but may need straightening out. The drop in RPM when you disconnect hose shows the advance is working, maybe start with verifying TDC Top Dead Center on Cyl. #1 and initial static timing.

 

[mr.mustang]

@ FalconSedanDelivery: thanks for the willingness to help. That is precisely the reason why i put everything back as it was b/c i did not have complete understanding of how the internal work even though i did read up on some how the DSII work.

@ JackFish: When i switch the spring I did not take out the distributor I only removed it after I put the original spring back and it was not working. So the problem was present before i took it out to retime it.

@ Lazy JW: I had was running the DSII off the carb vacuum for about a year and you may be right but it was running ok for a while.

 

[Lazy JW]

...... was running the DSII off the carb vacuum for about a year and you may be right but it was running ok for a while.

The fact that the engine slows dow dramatically when you remove the vaccum line suggests that it is indeed connected to the wrong vacuum source. If it is connected to manifold vacuum, then you will get maximum vacuum advance at idle, which means you have to adjust the idle and/or base timing all katywampus in order to make it run.

Best thing to do is DISCONNECT the vacuum line from the distributor and plug it off while you are setting the base timing and idle adjustments, then make certain that you find the PORTED vacuum source at the carburetor; this ported source will have zero vacuum at idle, but as soon as the throttle opens just a small amount it will uncover the port and vacuum will be present.

I too suspect the base timing is off.
Have fun,
Joe

 

[mr.mustang]

@ Lazy JW: I switch the vacuum an now I don't see the DSII vacuum engaged until I hit the throttle. Yet still having same problem.

I manage to get the car in gear but at a very high rpm, and when I drove the car it felt good just must keep the RPM up.
I''ll mess with the timing a little but I doubt it but you never know.

 

[The Plankster Prankster]

by the sound of that, i suspect the timing may be too far advanced, engines love that at high RPM but hate it at low RPM. the fact that the engine runs at all means that all the basics are still working and its only a tuning problem

 

[mr.mustang]

You guys were right timing was a littlw off, I just move the distibutor a few inches counter clockwise a few inches and that did the trick. It still idles high but that might be carb issue and timing issue. Thanks