1nonly
New Member
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- Aug 17, 2012
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- narre warren
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- vs commodore
I have a 2004 series 2 vy supercharged calais it has been boosted to 10 psi. I am having a major problem when i accelerate heavy in second and third gear the car sort of looses power and gains power and it becomes quiet jerky and doesn't gain much speed. When I had my dual 2.5inch catback exhaust on it would back fire when it happened. I have had it at the mechanics and he hooked it up to his scan tool and came up no engine problem and no transmission problems. And will take alot of work to diagnose which means alot of money. Please help me brainstorm some ideas as I am stumped. Whether it is injectors or fuel pump not putting in enough fuel for the air its bringing in or a vaccuum problem or worst case compression problem. Has this happened to anybody?