Tim,
If, after you check your coil and condenser as suggested, and you still
have the same problem, take a look at the float valves.
I had a similar problem on my TR3 fitted with the Grose jets and one or
both were always getting stuck and preventing fuel flow. The car would
start just fine, but after idling while I closed the garage door and I
attempted to drive out the driveway, the car would stumble and finally
stall. Examination of the float bowl showed one or both were empty. I
finally fixed the problem by fitting original float valves.
I could never figure out why the jet would stick closed but they did.
Bob
On 11/07/2011 05:28 PM, KingsCreekTrees at aol.com wrote:
> Hello All;
>
> I drove into the nearest small town today, on mostly straight roads at
> 50-60mph. I made a few stops at stores and the bank, then started off for
> home.
> After the car had been sitting for probably an hour, it started great. I
> pulled away onto the highway, got up to cruising speed and then there was a
> sudden loss of power. It was missing (but not "sharply", suggesting to me
> that it's a fuel problem and not ignition). Applying more throttle slowed
> the car even more, applying less did the same. There was one throttle
> position where the vehicle would maintain about 25mph, but running rough.
> Eventually, it lost more and more power and finally the engine stalled.
>
> I let the engine sit maybe 30 seconds and tried to start it. It cranked
> over for a longer time than usual before it fired, but when it started it ran
> perfectly. I drove away and managed to get about a mile down the road
> before the sudden power loss and rough running came in again. This time I was
> able to nurse it along at 50mph (it's a flat road) as long as I kept it out
> of overdrive. Eventually, same thing; lost power despite my playing with the
> throttle inputs, and eventually died. This time I left it a minute before
> starting. It started almost immediately and ran fine, but it was a repeat
> of the same scenario several times until I got home.
>
> I have done no diagnosis yet, so I could be wasting everyone's time.
> However, if anyone has any suggestions, I'd love to hear them. Maybe a bad
> float???
>
> Tim TS22930LO, Ontario, Canada.
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