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Old 01-18-2006, 11:21 AM
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shotgunslade shotgunslade is offline
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Need to be careful with increased fuel pressure with the Stage 2 chip. Can lead to idle hunting problems. Stage 2 v 4 was set up too rich at idle, and users experienced hunting idle and stalling. In putting an adjustable FPR on my car, Tom Johnson initially set the fuel pressure at higher than stock, and experienced a similar idle instability. So, I think I will keep it at stock pressure normally for convenience, but maybe raise it when I really want optimal engine performance at high revs. A long way of saying that the adjustable fpr may be a better choice than the Impreze fpr.
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