so what does the pressure gauge say then? Mechanical pump could be a little
on the slow side for webers. However, as someone else said, start off with
the ignition before even thinking of touching carbs. (of course there are
various fuel filters which might want cleaning etc.
> ----------
> From: kehrlich@dyax.com[SMTP:kehrlich@dyax.com]
> Hi gang-
>
> My TR6 has recently begun, on occasion, to suddenly lose power out of
> nowhere, though not cut out completely, and then in a short while pull
> itself back together again and continue running fine.
>
> The symptoms are the car will suddenly begin to run like its gasping for
> something. For you medical types, its kind of like a steady heartbeat
> suddenly erupting into spasms of arhythmia. A total change in engine
> sound and pitch accompanies, like a low humm or buzz. It always happens
> while I am either running under power and in lower gears while
> accelerating, thought not hard acceleration, or when holding at a lower
> speed. It never happens more than once on a trip, but is happening with
> increasing frequency. The engine doesn't cut out, just no power. I can
> maybe get the rpms up to 3000-3500 at best in revving though for some
> reason revving seems to make it worse as its occurring. I find if I put
> it back into gear and stay on the accelerator, it will pull itself out
> of the gasping arhythmia and back to steady running within a minute or
> less. It's never died completely of this and doesn't recur on the same
> trip. There is some mild popping sounds when the condition occurs, but
> no particularly bad smell, smoke or fuel odors. It has happened on both
> hot and mild days, so it seems unlikely to be vapor lock. It has always
> happened on straight and flat roads. Unfortunately it always happens in
> a busy place so I can't get out and look in the engine real-time.
>
> The gas tank is an aluminum tank installed 3 years ago, a 3 year old
> stock mechnical fuel pump, the incoming filter is new and clean (clear
> bowl). Unchecked is the mid-line fuel filter (large canister type not
> see-thru). There is an AC fuel pressure meter on the fuel line and I run
> dual Weber DGV's. I have an ignitor ignition, new sport coil and new
> ignition wires. I have done nothing lately to adjust anything in the
> system. I have checked all vacuum hoses visually and they appear to be
> tightly connected.
>
> I'm guessing its somewhere in the fuel system, though I am open to the
> idea it may be somewhere else. But before I start going through it and
> replacing parts end to end, I thought I'd ask where I might start first
> and what order to go through by highest likelihood of cause.
>
> I know there have been tons of such incidents reported on the list and
> lots said about them but my memory is getting weak with age. Off-list
> responses are fine if anyone thinks they can help.
>
> TIA
>
> Keith Ehrlich
> 74 TR6 "Gasper"
>
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