[DML] Dwell meter readings + possible vacuum leak
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[DML] Dwell meter readings + possible vacuum leak



Ok here are my dwell meter readings. My Dwell meter is of the 
variety that has a + and - lead and then the dwell lead. I have 
attached the positive lead to the jump post and the negative lead to 
block. The dwell lead is connected to the orange wire that would 
normally be plugged into the diagnostic plug. This lead is melted 
and can not be plugged into the diagnostic plug. 

Fixed: 61%
WOT engaged: 66%

Then after about five minutes the meter goes from 61% slowly to 42% 
and then pops back to 61% and repeats over and over until it starts 
to settle at: 55%-44% so 50.5% average

Fully warmed up: 58% - 46% so 52% average

I can not get the meter to fluctuate around 45%.  Further enrichment 
causes the FV to stop buzzing and the dwell meter reading ceases to 
fluctuate. 


Now; I can hear this hissing sound on the driver's side of the 
engine. Listening through a piece of PVC pipe the sound seems to 
come from the hose that runs between the cold start valve and the 
idle regulator.  I removed the hose and it is fine but the sound 
persists! I originally though that the leak was coming from the tube 
that runs into the mixture control unit. Any ideas? I am assuming 
this is a vacuum leak but perhaps it's something else. Thoughts, 
comments, corrections, criticisms greatly appreciated.

Nathan

2277








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