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74 Gi too much timing advance

one_track_mind

New member
"Can anyone give me some much

"Can anyone give me some much needed advice on my motor. I am getting 55-57 degrees of total timing advance. I have replaced and adjusted the TPS and replaced the MAP sensor.This is a 1995 fuel injected motor, I am really hoping it is not the ECM.The boat was at the dealer and an OBD showed no codes."
 
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