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 Control Module: Service and Repair

NOTE: YUGO RECALL #91V130 WATER INFILTRATION AT (ECU)

On 1990 and 1991 E.F.I. GV Plus cars there is the possibility of water infiltration at the three studs that support the E.C.U. Check your vehicle for the presence of a colored sticker on the trim panel below the passengers side dashboard, indicating recall has been performed.