Also a good idea to check the conditon of the needle and jet in each
carb. The needle rides up and down through the jet, and wears on the
jet over time. I recently had my carbs rebuilt professionally (Gary
Martin, did a great job!), and he replaced the jets and needles. He
said my jets were in terrible condition, the holes had been elongated
and he'd never seen a set so bad. Which would explain why my car had
been running so rich and making such BAD gas mileage! Bad jets/needles
will obviously make it tough to pass emissions testing.
Tim Holbrook
1971 TR6
--- Shane Ingate <madmax_xx@hotmail.com> wrote:
> From: "Shane Ingate" <madmax_xx@hotmail.com>
> To: morgant@ctc.net
> CC: 6pack@autox.team.net
> Subject: Rebuilding Zeniths
> Date: Fri, 02 Nov 2001 12:23:02 -0500
> Reply-to: "Shane Ingate" <madmax_xx@hotmail.com>
>
> Tom,
>
> There is rebuilding Zeniths, and there is rebuilding Zeniths.
> I had the same concerns as you many years ago, of trying to get a
> 74 model through California emissions. I "rebuilt" the carbs
> following the advice of books etc, and though it did improve the cars
> running, it still did not pass the sniff tests. It turns out that
> the where the throttle shaft passes through the carb body can wear
> a lot, leading to vacume leaks and subsequent high CO levels.
> An easy way to check for this is to spray WD40 around the throttle
> shaft with the car running, and listen for an immediate improvement
> in the idle. If so, you have a leak, and the only way to fix this
> is to rebush the shaft; not a job for the amateur. Its been a long
> time and
> I do not remember the costs, but I think that a complete
> rebuild and rebush will run around $150 per carb.
>
> The good news is that you will not believe the difference in how your
> car
> will run!
>
> A parting word; make sure all all vacume lines are solid. This is
> really the main reason for motors failing or producing marginal
> results
> in the sniff test. And like electrics, they can also be the most
> difficult to diagnose (though dead-easy to fix).
>
> Good luck!
>
> Shane in Maryland
>
> _________________________________________________________________
Find a job, post your resume.
http://careers.yahoo.com
|