I am still knocking the intercooler pump control thing around in my head. I was thinking pulse width modulation using the tps sensor. Problem with this is at low pulses, the coolant probably isn't moving enough. I'm thinking this product: http://www.autospeed.com/cms/article.html?&title=Incredibly-cheap-voltage-switch&A=113008 With this, I could separate the tps from this unit with a diode, and still use the pot to adjust on voltage so the inter-cooler come on full at part(say 1/4) throttle. with this setup, I could use a switch in the cabin (Wired in-between the diode and voltage switch) to key the inter-cooler pump to have it on all the time if I wanted without affecting the tps voltage. This would accomplish my requirement of the inter-cooler pump not drawing current in stop and go traffic but yet run when the rpm's are a bit higher and the alternator can supply enough current under all conditions. The adjustable pot on the voltage switch makes me think this is the correct way to go.