Yup I have this. Does your car stay at normal operating temp? I find that if it's idling in the driveway, it will get to normal temp and stay there. upon driving, however, it dips to 180 or so and wont come back up.
Additionally, there is a sound like avacuume leak once it gets to 180 or so that sounds as if it's coming from behind the speedo cluster.
Because of the fact that it doesn't stay up in temp, I'm wondering if it's not a thermostat issue in addition to the air pump.
At anyrate, there is a solenoid that cost $10 that could be the problem. You need to test the solenoid to determine this.