during my 3 hour commute I had lots of time to think about the problem and remembered I had an extra IP that came with the car, that is supposed to be bad. So when I got home I eyeballed the old IP and it has the lift pump on it. It is full of grime from being out in the New Mexico weather, should I clean it up and give it a whirl? Are there other checks I can do on the existing lift pump? i.e. the lift pump activation system.

Thanks