Possibly, your carbs are running out of gas because the fuel pump can't
keep-up, or you may have a vapor-lock problem. Check if the gas line is
heating-up from the engine or exhaust.
Vapor lock was a huge reliability problem for me until I had the fuel line
re-routed. Now the line comes down out of the tank, into a filter, through
a Facet pump and up to the engine bay on the driver's side inner frame rail
like stock. But unlike the stock system, which goes to a fuel pump on the
engine, my line keeps following the driver's side frame rail under the
engine, crossing under the engine behind the front frame cross-member, and
up to the carbs. The front carb is the first to get gas. I've seen others
route the line behind the battery to keep it away from the hot engine.
In autocrossing my TR6 for seven summers I never had a problem with
"bucking", or any other mechanical DNF. The car was always reliable
autox'ing even in 95+ degree heat. OTOH, my driving the car fast, of
course, was never reliable... ;-)
HTH, Kevin
----------
>From: "ROBERT L. GANNON" <trsix74@earthlink.net>
>To: "'6pack-digest@autox.team.net'" <6pack-digest@autox.team.net>
>Subject: Bucking TR6
>Date: Wed, May 3, 2000, 9:32 PM
>
>Recently I went Auto Crossing. I noticed when gunning the engine I would
>loose power just like as if the car was out of gas, then it would buck
>and zoom down the track only to buck again. This got on my nerves after
>a while. I took a break and after lunch found that the car raced well
>with no bucking on the first run, but the next three runs the bucking
>started again. I am assuming that this is due to the rising temp of the
>engine while waiting in line for the start. I would let it stay running
>even though there would be about a five minute wait. When I go for day
>trips I have never have this problem. When I rev the car at a stand
>still there is no hesitation under normal conditions. I have I believe
>everything well set up and all my hoses and vacuum lines are tight. Does
>anyone have the answer or the solution to the problem? I bet Dick Taylor
>does!
>
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