2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
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CPU ground

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Old 04-08-04, 07:22 AM
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CPU ground

again i am doing the engine ground mod tomorrow and was wonderng what wire on the cpu do i ground? im pretty sure that it is a black wire but do u guys know for sure..
Old 04-08-04, 07:31 AM
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Also how can i check if my fuel gauge is gettin the correct amout of power cause the wires test light ok but my gauge stays at E all the time..ive trie everything im stumped....what is FSM?
Old 04-08-04, 07:38 AM
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fsm = factory service manual, you can d/l at http://www.teamfc3s.org/main/factory_service_manual/
there are four ground wires coming from the ecu i believe... the fsm has which ones they are.

for a s4 na pages 29 -33 of the chapter on fuel and emmisions control tell you what you need to know
Old 04-08-04, 06:09 PM
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CPU is the body computer... you want ECU (engine/emissions control unit) information
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