clp86rom

Had to replace a leaking supercharger intercooler. Replace it and all of the associating gaskets with OEM parts again.

When the car is at operating temperatures (in its normal warm position), the supercharger will engage and disengage randomly while cruising on the highway.

Could the IAT sensor cause this?? I am thinking I might have damaged this sensor when I was cleaning out all the stuff of built up coolant with engine cleaner spray and water.

husqvarna

Maybe is your intercooler pump.
If so get the updated version i.e. bosch 010, its beter than johnson

Dollos

+1 and its a OEM fit...

Lenin

You have to do some basic data logging. Record your IAT and Boost and you will be in s better position to diagnose the issue. You of course replace parts one a time and one of them will fix the problem but that is not the way to run these older high performance cars.

clp86rom

a big MAYBE

Reason is because my pump does not leak and appears to work as intended. I can hear the pump running when the engine in on, and when the engine is shut off for the first 5 seconds. Obviously fuses are good as well.

but MAYBE

If the pump would be going out, why would the supercharger engage again? You would expect the pump to either fail running or be too weak to cool the system all together.

clp86rom

I agree. I need to do some basic data logging. What are good solutions to data logging?

Yes, no reason to go happy replacing parts for no reason. There must be something causing this new phenomenal ever since this last weekend when I replaced the supercharger intercooler and all associating gaskets.

My supercharger would always stay engaged even after starting to miss fire due to coolant leaking previously into the cylinders.

insame1

Are you sure you got the system bled properly? I use the torque app. it works very well on the c32

Lenin

Exactly my point. If you see that the boost comes on and IATs are staying high after the SC cuts out, then the issue are the high IATs. If the pump is working as you say, then purging the system is the next thing that I would do.

jvakos

the supercharger can still engage (assuming not malfunctioning) even with a dead intercooler pump if the temperatures are low enough and not causing heat soak. my intercooler pump was dead for 3 years but the car would still have the occasional burst of power and drive normally for 2-3 pulls before heat soak set in and temporarily disengaged the supercharger. you will not see a malfunction light or code thrown with a bad intercooler pump. i read up about it on these boards to figure out what was going on and first checked my fuse which was fried and then listened to the area where the pump is and neve heard it activating.

i bought the bosch 010 pump a year ago for 100 bucks on amazon and had my shop guy install it for 1.5 hours of labor and it was like the car was brand new again... just added that PLM heat exchanger and it stays at 90-95 degrees consistently and been staying cool even with the early 85 degree chicago heat we had the past couple weeks.

check your pump its probably that if your getting intermittant supercharger cut out...

clp86rom

Resolved.

The previous owner had installed the two coolant valves to keep the engine coolant separate from the supercharger intercooler coolant. After installing the new sc ic, i did not open up those two coolant valves to let coolant flow into the new ic :-(

I'm glad i figured it all out before i fried my sc, ic, ic water pump, etc.

Everything is working like it should!

clp86rom

BTW...THANK you all for the information!

clp86rom

Some pictures from the process...