Thanks to everyone who replied to my problem. As I need to drive the
car across the state tomorrow for a show, I was going to shotgun the
problem and change everything that had been suggested. I did change the
distributor cap, rotor and coil, then started in on the carb side of the
engine when I remembered that a couple weeks back I had tried the
external oil feed line. I had so much oil to the head, is was being
sucked into the carbs, and apparently had completely plugged the
evaporative canister. I replaced the canister and the problem was
solved. I guess the oil saturated charcoal was acting like the
anti-run-on valve and choking the engine. Thanks again, you guys are
great. John
Navarrette, Vance wrote:
> John:
>
> Does the engine bog, or is it more like a 'pop' or miss?
> Does it go away if you give it a tiny bit of choke?
> Is the engine slow to settle to an idle as you pull up to a
>stop?
>
> What you are describing is most likely a lean mixture just off
>idle. This can be caused by a couple of things:
>
> Low/no oil in your dashpots
> A faulty damper that lets the air valve rise too quickly.
> Wrong oil in your dash pots.
> Mixture set too lean.
> Bypass valve leaking at idle.
>
> If the stumble goes away when you crack open the choke and the
>engine is warm, then it is most likely a lean mixture. You will need to
>eliminate the possible causes one by one.
>
> The retard unit on your dizzy is functioning correctly if the
>idle speed rises when you pull off the vacuum line.
> Be sure that you are setting your timing to 10BTDC with the
>retard vacuum line DISCONNECTED and PLUGGED. If you are leaving your
>vacuum line on when you set the timing, set the timing to 4 ATDC.
>
> Let me hear from you, and we can work through the possibilities.
>
> Vance
>
>
>-----Original Message-----
>From: owner-6pack@autox.team.net [mailto:owner-6pack@autox.team.net] On
>Behalf Of John Mitchell
>Sent: September 29, 2006 1:50 PM
>To: triumphs@autox.team.net; 6 Pack
>Subject: Off idle stumble
>
> I have a stumble as I pull away in 1st gear once the car warms up.
>
>Once I get rolling, everything seems normal. Ive recently changed
>distributor because of wobble in the old one. Its a newly rebuilt lucas
>and the timing appears to be right on including the retard unit. When I
>
>pull the hose off the retard capsule, the engine does increase speed by
>about 500 rpm, not sure if that's normal. I also recently adjusted the
>temperature compensators per Nelson Riedle's article. They didn't seem
>to be working at all before. Since this seems to be temperature
>related, should this be the first thing to suspect? Dashpots are
>filled. Any advice would be appreciated. John Mitchell 76 TR6
>
>Your messages not reaching the list?
>Check out http://www.team.net/posting.html
=== This list supported in part by The Vintage Triumph Register
=== http://www.vtr.org
|