David:
Sounds like you have a sticky float in your rear carb. It isn't
sticking until the carburetor is fully warmed up. Your spark plugs are
talking to you - the only way 3 of them can go white is when the carb
doesn't deliver enough fuel. Since 3 are fine, you can rule out the fuel
pump and fuel filter.
Drop the carb on the three lean cylinders. Check for the float
being full of fuel (leaking), damaged, set at the wrong height, or
binding on it's hinges. The needle valve could be sticking too. There
isn't much else it can be in my humble opinion.
Vance
-----Original Message-----
From: owner-6pack@autox.team.net [mailto:owner-6pack@autox.team.net] On
Behalf Of David Schuler
Sent: Thursday, August 05, 2004 6:09 PM
To: 6pack@autox.team.net
Subject: Rough running
Dear list,
I am out of ideas on how to get my 74TR back on the road without
stumbling
back to the garage. Car will run fine in the garage but after awhile on
the
road( no consistent amount of time) it starts to run very rough- like
I'm on 3
cylinders instead of six. Can barely keep it running with the choke
pulled
partially out and I limp home. When I pull the plugs 1-3 are light
brown, 4-6
are white. I had the carbs rebuilt professionally over the winter and
the car
ran like a scalded dog for about two months with no problems. When I
initially
had the problem it was suggested by the person that rebuilt the carbs
that I
replace the needle valve-which I did- because it might be defective. No
luck.
I have put in a new tank of gas, fuel filter, fuel pump, blown out the
fuel
lines, adjusted the carbs following the Buckeye website including the
float
and mixture. All the emissions are off the car except the valve cover
vent to
the carbs and carbon canister. Vacuum is pulling 16-17. Timing is set to
8
BTDC with the vacuum advance attached. Have a crane 700 ignition.
I am lost and the summer is over half over. I want to get out on the
road past
the stop sign at the end of my street. Any help or suggestions would be
greatly appreciated.
Thanks,
Dave Schuler
74 TR6
Carmine Red
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