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Path: utzoo!linus!decvax!decwrl!spar!turtlevax!weitek!mmm
From: mmm@weitek.UUCP (Mark Thorson)
Newsgroups: net.auto
Subject: Renault Le Car and other carbs
Message-ID: <280@weitek.UUCP>
Date: Sun, 29-Sep-85 19:21:21 EDT
Article-I.D.: weitek.280
Posted: Sun Sep 29 19:21:21 1985
Date-Received: Wed, 2-Oct-85 12:11:20 EDT
Organization: Weitek Corp. Sunnyvale Ca.
Lines: 32
Keywords: Renault Le Car, carbs, jets

>I have (another) problem with my 79 Renault LeCar.  It idles very roughly,
>and often stalls at stops.

I suggest you remove your carburator jets and clean them out.  After
I did a major rebuild of the dual Zenith carbs on my "59 Porsche,  I
had to clean out the jets on THREE separate occasions within one month.

A clogged main will cause lack of power when accelerating.  A clogged idle
will mean roughness and missing at idle, as well as difficulties in starting.

The jets are the nozzles through which gas is sprayed into the carburator
throats.  They are small (1/2 to 2 mm), so any dirt larger than that has the
potential to choke off gas to one or more cylinders.  For each throat, there
will be one main jet for the fuel supply while your accelerator pedal is being
pressed and one idling jet for gas while your pedal is up.  My Porsche has two
dual carbs, so that means there are four throats and eight jets.  The jets on my
carbs are behind little panels with single bolts and O-ring gaskets.
Each jet is a brass tube that screws into threaded holes in the carb.  On
a VW, the jet is behind (or inside) a big brass bolt that sticks into the side
of the carb.  I don't know what a Renault carb is like, but I expect there
is access to your jets without taking the carb apart or removing it from
the intake manifold.  You probably would have to dump all the gas in the
carb float chamber if you remove the jets, so DON'T SMOKE and don't do this
near a gas water heater, etc.  On some carbs (like my Zeniths) you don't
have to actually take the jets out to clean them out (not the mains, anyway).

To clean out the jet once it is removed, poke out any crud with something
long and stiff.  Insulation stripped off a piece of wire-wrap wire works
great.  Don't use a piece of wire, though, because that might scrape the
inside of the jet (which could change the diameter of the bore).

Mark Thorson (...!cae780!weitek!mmm)


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