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djkoumou
Guest
I have a 1980 4.9 Turbo Trans Am. It is partialy restored. It has been sitting outside for two years after a engin over haul. At first it would back fire any time you hit the gas. we adjusted the timing and now it doesn.t backfire untill it hits about 3000 rmp when the turbo kicks in. Is this an issue with the turbo or could the problem be somwhere else
