After several annoying misfortunes after rebuilding the engine I finally put
the car up on the Highway. Almost all of the vibration experienced
previously is gone due to 1) balancing the wire wheels at a business that
actually knows how to do wire wheels correctly and 2) balancing the
driveshaft. However a couple minutes of highway speed brought on
backfiring/sputtering through the exhaust with a significant loss of power.
When I got off the exit and resumed city driving it seemed to "recover".
Checked under the bonnet; everything seemed OK. Went back home and the same
thing happened (I could barely maintain the speed limit).
Things to consider:
The car hadn't been driven for 2 years during the rebuild (carbs were
rebuilt a few years earlier)
The engine has less than 100 miles on it
The gas, although it has stabilizer in it is also about 2 years old
I suspect a fuel delivery problem. I seem to recall a thread about setting
the floats in the bowls. I have installed Grosse Jets and have never felt
that setting up the floats per the manual is giving the desired result so
this may be a problem. Anyone have any comments here?
I'm going to replace my in-line fuel filter a lunch to see if that is
creating a restriction. What else should I check?
Regards ..... Andy
Andy Amatruda
Senior Member Technical Staff
AS&C, M&C
aamatruda@ti.com
(508) 236-3219 phone
(508) 236-3586 fax
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