On Wed, 11 Jun 1997 10:01:16 -0700 Randy Rees <randyr@starwave.com>
writes:
>
>My 67 BGT starts right up in the morning (and all other times)but
>after
>about 40 seconds of running it dies, sound like fuel starvation; and
>just won't restart. I let it sit with the key on for a while and keep
>cranking the engine, after about 10 minutes of this it finally starts
>but runs real rough and has a missing, running on 3 cylinders kind of
>sound, then finally comes out of this and runs just fine. typical
>temperature outside is 55 degrees. Now the funny part. I can let it
>sit
>inside the company parking garage for about 10 hours during the day,
>temperature is about 55-60 degrees, car starts right up, and drives
>just
>fine, never misses a beat. Temperature gauge shows its dead cold, just
>like in the morning. It starts and runs without hesitation, any other
>time I ask it to.
>
>Why only in the morning? It does not seem to be temperature /time
>related. The only other clue is that my fuel pump runs all the time,
>not
>real loud but it is running, with just a little louder click every now
>and then. If my fuel pump was having problems wouldn't it be the same
>morning or evening as long as time and temperature was a constant? Any
>other facts I left out?
>
>Please help as this is trying desperately to become my only daily
>driver, and my wife is just looking for a reason to have less cars in
>the driveway, I just want it to be the Samurai that leaves, not the
>MG.
>
My guess is the fuel pump is terminal. The (probably) slight difference
in temp overnight vs the garage may be enough to cause temporary pump
failure. The clue is the fact you have to leave the key (ignition) on
for a while to get it running in the morning.
One way to test it is some morning when you aren' t rushing off to work
(aka. Saturday) before cranking, test the pump pressure and volume. To
test volume, disconnect the line from the carb, with a suitable tubing
coupler connect a longer line to the rubber fuel line and run it into a
sized container, at least one quart. turn on the ignition and time the
flow of fuel until the container is full. I don't have my manual handy,
but I think the rate should be about 12 gal/hour (Some one is sure to
correct me if Im wrong). 12 gal/hr converts to about 1 quart in about 1
1/4 minutes.
Pressure should be between 11/2 and 4 PSI.
Hope this helps
Rick Morrison
72 MGBGT
74 Midget
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