Im particularly interested in this thread because lately my IATs have been through the roof...225 degrees at the end of the 1/4 mile or on a highway blast. Sometimes the s/c shuts off and sometimes it does not. The i/c pump sees to be fine.
Originally Posted by tighed1
Errrrnt! (failed buzzer sound)
Pump turns on when the supercharger first kicks in then remains on until the car is shut off.
Remove the cap from the top of the coolant overflow/storage tank.
Use visegrips or whatever and pinch the upper hose coming from the intercooler below the "Y".
Pull off the tiny hose that is on top of the tank and hold it over the now open storage tank.
Start the car. Put it in gear (DON'T forget to use the brake!) and rev over 1300 rpm so that the SC kicks on. Put car in park.
Coolant should flow from the tiny hose if the pump is on.
I think!
I just went out and experimented with this. I dont have to engauge the gear selector for the pump to come on. I was reving it to 2000'ish rpm and it came on every time. Each time i shut the car off and sure enough the pump did not come back on until i blipped the throttle again. Car was fully warmed, not sure if that matters.
Originally Posted by tighed1
I too replaced a perfectly running pump ($175 ouch) only to find out the problem was not enough cooling between the intercooler and heat exchanger.
Problem was permanently solved when the dealer replaced the intercooler.
So what was wrong with your old intercooler. Did it leak or was it clogged? It would be very odd for the intercooler to stop working are you sure the dealership didnt replace a sensor while they were in there?
Originally Posted by ZAHANMA
I actually had a short in my ambient temp sensor. It was shorted out showing -34F when it was unplugged and should be reading 130F or something like that. Basically there had been a short across and the polarity switched. I pulled my ambient temp sensor, put a wire in there to cause a short. Then i reset the battery drove for a few weeks without a ambient temp sensor, then put the temp sensor back in to test it out. Works just fine.
NOTE: My dash was still showing the correct temperature.
It was apparently telling the computer it was -34F outside causing the computer to dump fuel to account for the negative temps...however, since there were no negative temps it cause the engine to overheat and shut off the engine...not to mention the 16mpg I was getting.
In answer to the question I see coming, yes I thought it was the I/C pump. I replaced it, and it kept doing the same thing. Pump was most definitely still working...
Im not fully understanding this. Did your dash still show the correct temp even when the ambient temp sensor was removed? Because myself and two other members have pulled our ambient temp sensors and they also showed -36.