[TR] loss of power

[Chip19474 at aol.com]

Peter,
 
Intermittent problems are the worst to solve but it sounds like you've  
covered the basics for fuel delivery which is a good start.  Unless you've  
actually checked the carb diaphragms for cracks or splits I wouldn't assume that  
they're okay.  I also like the idea of a "lagging rotor" which someone else  
mentioned.  There should be no play when you turn the rotor by hand.   Worn rotors 
(on the distrib shaft) can cause a symptom like you've got because  the rotor 
is not responding to a requested increase from the throttle when you  go to 
full throttle.  I think the rotor may be in-time during partial  throttle 
(cruising) but when you go to full throttle and the  distributor wants to advance 
the spark, the rotor can't keep  up with the distrib shaft speed so it lags 
behind and tends to keep  the timing retarded just when you need advanced timing 
to match  the increased fuel delivery for more power.
 
Swap the rotor for a good one but if you have a timing light, it would be  
interesting to observe what the timing does when you quickly increase throttle  
at idle.  If your distrib is working okay and the rotor is okay, the timing  
should increase when you blip the throttle.
 
Chip Krout
Delaware Valley Triumphs, Ltd.
Skippack, PA
1976 TR6  CF57822U
 
 
In a message dated 9/1/2008 5:48:42 P.M. Eastern Daylight Time,  
peterara at msn.com writes:

The  thing is it heals! and is  intermittent!





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