light load surge finally nailed

[rb3221]

On the low speed drivability on the 99/2000 they get a vacuum signal to the fuel pressure regulator which seems to really piss em off when ya mod em.
when I map em i prefer to eliminate that so fuel pressures are stabilized under vacuum situations.
one of the reasons the 01 ran better low speed

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You will find most of the problem will be in low end fuelling and is usually at light throttle where the IAP A/F and TPS A/F are floating from one to the other and if the settings are not correct as they jump back and forth to each other the transition creates whats felt as surge effect.

So true, but with Gen II this is not an issue because IAP (Intake Air Pressure) has an influence across the TPS (Throttle Position Sensor) range.

great points as well

THEMOTORHEAD
how do you go about eliminating the vacuum signal to the fuel pressure regulator?