Poor gas mileage, poor throttle response, possible overheating.
Typically, the engine "feels sluggish", but full throttle power is not
affected (since the vacuum advance does nothing at full throttle or
idle).
On a TR2-4A, it's not uncommon to not even notice a broken vacuum
advance diaphragm, because the tiny vacuum line limits the size of the
vacuum leak (and since there's no vacuum at idle, it doesn't affect idle
speed/mixture). So, it's a good thing to check at each tune-up.
Randall
Tony & Amy Jo Zager wrote:
>
> Listers,
>
> I have what may be a stupid question: What effect will blocking off the
> vacuum advance on a TR 4 engine have on the way the car runs? (my vacuum
> advance died and I havn't got a replacement yet....)
>
> TIA,
>
> Tony Zager
> 1963 TR 4
|