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03-09-2013
Anyone one know what the recommended Fuel Pressure would be for a 1999 Pontiac grand prix GTP? Its at 38 psi while idle and with max boost goes up to about 45 psi is any of those two out of the ordinary? I have a random misfire coming only under load and only when the supercharger kicks on...just seeing if it's fuel delivery
03-09-2013
Should be atleast 44-50 at idle and go up from there when the fuel pump kicks into high mode when you get on it.
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