Sealine218 - Running Rich

Sealine218

Recruit
Joined
Jul 14, 2019
Messages
1
My Volvo petrol 1991 431A with a quadrajet seized and I have Repowered with a new long block vortec 220hp with a new Edelbrook 1409 marine carb. My engineer fitted everything including a new starter motor and electric fuel pump. Unfortunately it ran well on tick over but started to die on acceleration under load and occasionally backfired and frequently surged. We tried another new edelbrock 1409 but same thing happened. The engineer rebuilt my old Rochester 4 barrel with the kit and it now works albeit it runs rich. Has anyone experienced something similar and if so is there a fix.many thanks
 
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