Chevrolet CAMARO 1979 Service Manual page 595

F U É L S Y S T E M 6C-43
F i g . 6 C 2 ' 3 8 - . U p p e r C h o k e L e v e r
the choke pick-up lever. Insrâll rhermostatic coil and cover
so thar choke pick-up lever fits inro loop on end of choke
coil (Fig. 6C2-39). At this poinr, lhe indèx cover should be
adJusred. (See adjustneflrs). Install three choke cover
retâiners and screws, ând tighren secur€ly.
NOTICE: cround contact for the elecrric choke is
provided by â metal plâte locâted at the reâr of the
choke assembly. DO NOT INSTALL A CHOKE
COVER GASKET BETWEEN THE ELECTRIC
CHOKE ÀSSEMBLY
ÀND
THE CHOKE
HOUSING.
7. If us€d, position and r€tâin
ROCHESTER MODEL DUALJET 21O Ê2n/IE
C O I L l A N G
( , T R A P P E O
T H E R I M O S T A T I C
C H O K E C O I L
F i 9 . 6 C 2 - 3 9 C h o k e C o A s s e m b l y
CONTENTS
G E N E R A L D E S C R I P T I O N :
M o d e l E 2 M Ë . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 C - l
ON.CAR SERVICE:
AdJustn]ents(Overhaul)........
. ..................
6C-3
G E N E R A L D E S C R I P T I O N
M O D E L E 2 M E ( E N G I N E C O D E 2 )
The Rochester Dualjet E2MË Model 210 is a 2-bârrel,
srngle stâge carburetor oi downdraft design. À tfipleventuri,
with smâll I 7/32" borcs, makes the Model 210 especially
adâplable to smâller engine sizes. The triple venturi stâck-
up, plus small bores, results in precise fuel met€ring control
during all periods of engine operâtion.
whel u,ed wrrh rhe Flecrronic Fuel Conrrol ,EFC)
System Gee Section 6E for description), the Model 210
carburetor includes specjal design features for op!imum air,/
fuel mixture control during all ranges of engine operation.
Àn eleclrically operâted mixture control solenoid,
mounted in the floât bowl, is used to control air and fuel
metered to the idle and main meterirg sysÈms of the
cârburetor. Fuel metering is controlled by (2) speciâl
stepped m€tering rods, opèrating in rernovâble jets,
positioned by â plunger in the mixture control solenoid. Th€
plungef in the solenoid is controlied (or "pulsed") by an
electricâl outpùt signal received from the Electronic Conrroi
Module (ECM). The ECM, responding 10 an electrical
signâl from the oxygen sensor in the exhâusr, energizes the
Mixture Control AdJusrmenrs............................. 6C 3
. - " r l . , r ê , ^ , p p n t l . p m ê 1 .
. . . . . . . . . 6 c - l l
U N I T R E P A I R T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 C - t 2
idle stop solenoid ând
CONNECTOF (F3OM ECU)
F i g u r e 6 C I Ê 2 À , 4 E D u a l j e l [ , 4 ô d e l 2 1 0
solenoid io move the plunger (ând rods) down to the lean
position, or partiaily energized, up to ihe rich position 10
control fuel deliv€ry ro the idle and main metering systems.
At the sâme time, air metering to the idle system is