Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Engine Identification

ENGINE VIN CODE [1]
FEDERAL EMISSIONS EQUIPPED E or F
CALIFORNIA EMISSIONS EQUIPPED D or F

ENGINE DESIGNATION CODE [2] AAA

ENGINE CONFIGURATION [3] Vee / In-line 6 cyl.

DISPLACEMENT 2.8L (2786cc/170ci)

COMPUTER SYSTEM [4] Bosch Motronic M2.9

FUEL SYSTEM [5] Sequential Multi-Point Fuel Injection

IGNITION SYSTEM [6] Mapped Electronic Ignition

[1] 5th digit of Vehicle Identification Number (VIN). VIN plate mounted atop drivers side instrument panel, visible through windshield lower left corner.
[2] Engine code stamped on front of engine block where block meets cylinder head.
[3] 15° V-6 DOHC 12-valve (2 valves per cyl.), 172 HP.
[4] Bosch Motronic Engine Management System (version 2.9) with OBD. System uses single Control Module for both fuel and ignition control.
[5] Fuel System uses solenoid-type injectors, Heated Oxygen Sensor feedback, start and idle speed control, after start, warm up and acceleration enrichment, deceleration fuel shut-off.
[6] Transistorized Distributor Ignition System, Hall sender and cylinder selective Knock Control.