Hmm ... could be a few things. The problem is more than likely fuel related.
You didn't say what type of carb you have. Stromberg's, SU's, Webers,
Mikuni's, etc. That's helpful in diagnosing a failure. Also, I've seen
sticky linkage issues cause this. Have you sprayed around the manifolds for
leaks? Vacuum leaks can cause this.
On the electrical side, have you done any mods to the vacuum advance? Is it
a stock dizzy using points or something else?
Curious minds need to know.
Johnnie
> -----Original Message-----
> From: triumphs-bounces@autox.team.net [mailto:triumphs-
> bounces@autox.team.net] On Behalf Of Dachnowicz, Peter
> Sent: Tuesday, July 06, 2010 1:15 PM
> To: 'triumphs@autox.team.net'
> Subject: [TR] Poor idle once TR4A is warm.
>
> My 66 TR4A starts and runs great through all gears with no hesitation
> or lack
> of power from 0 to 90.
> After about 20 minutes however the idle will drop down to approx 600
> RPM and
> eventually stall out. (Idle when cold is approx 850)
> To remedy this I have been giving a < inch of choke when stopped or
> just
> running lights. Either solution is not optimal.
> Where should I begin to troubleshoot?
>
>
> Thank you
>
> Peter
>
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