Hi all,
I just got back from a trip to and from work. Less than 20 miles each
way. At
about 10 miles each way, I was getting some stumbling.
The terrain varied, slight incline/decline or flat. Speed was constant,
sometimes a lift off the throttle for traffic.
The symptoms were 3000-3500 rpm, the tach would bounce down to
1500-2000,
and then back up. A couple of times it dropped to 1000.
It happened 3 times in a row on the trip home, within about 3-4
minutes, so I
was ready and paying attention. The ignition light did not come on, ever.
I decided after that to get off the highway and take surface roads the
last 4
or so miles. And I got another stall at 2000-2500 rpm. I downshifted to 3rd
and the car restarted.
At a stoplight, the car did stall. It took 20-30 seconds of cranking to
start. Normally, the car starts within 10 seconds cold, and 2-3 seconds warm.
I got home without further trouble.
The car is a 1977 MGB, I have a pertronix distributor, that I put on
new last
year. A pertronix coil, that's 8-9 years old. Ignition wires are 8-9 years
old. Dual SU (HIF) conversion.
Alternator replaced to summers ago.
I'm in the middle of my second tank of gas for the season, I did put in
a can
of heat. The oil is fresh, changed last weekend. Oh, as a side note. I used
NAPA high milage oil. It's made by Ashland, which is Valvoline. Anyway, it was
rated SL/SJ. Not SM. Napa Gold filter.
I recently put in a plumbing ball valve in place of the stock heater
valve. I
don't see any leaking there, but I'll check it again. I do have to pull it
apart, I put the valve in backward for the cable to work.
I'm going to go and do a fuel delivery test (1 imp qt per minute), and
look
things up on Paul Hunt's web site. Oh, and check the rotor and cap.
What else?
Paul.
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Mgs@autox.team.net
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