ODB2 S52- Phantom power issue when turning engine off

[Klug]

Hey guys-

I'm noticing an issue with my s52 swap. For some reason, if my blower motor is running or the SPAL electric fan is running when I turn off the engine- there is a phantom power issue where they continue to run until the engine dies and shuts off.

Seems to be that when everything is under heavy electrical load, turning the key to the "off" position from running- doesn't provide the immediate "cut-off" of power to the accessories.

Kinda stumped on what I should look into....sticky offloading relay? Any pointers would be great- since I'm now on my 2nd new camshaft position sensor and I have a feeling that this power issue is frying the sensor...or at least that is what is on my mind.

Thanks!!

[Klug]

This still happens from time to time, not really sure why exactly. Just trying to remember to turn off the blower motor prior to turning off the engine. Very odd....

[TobyB]

The unloader relay getting power from the wrong place
(or yeah, just sticking) could indeed do it. I guess.
It sounds like the alternator's powering the acc circuit
(or some chunk of it)
even when the switch is off.

hmm

t

[Klug]

The unloader relay getting power from the wrong place
(or yeah, just sticking) could indeed do it. I guess.
It sounds like the alternator's powering the acc circuit
(or some chunk of it)
even when the switch is off.

hmm

t

Thanks man, after I read this I really dove into it and found out it was the either the unloader relay, FP or DME relay after replacing them and the problem went away.

I was pansy-footing around changing them out since I thought that the number on top of the relay was specific to the individual relay that was required. I had a few other "key lime" relays laying around but had different #'s printed on the top with different part numbers. I was pretty dumb to not realize they had the schematics printed on the side....duh....so the other green ones were the same layout, just with (2) 87 pin's...swapped them in, cranked the car on, air on and then turned off the engine- shut off just as normal.

Thanks for helping! I needed your push to at least get this resolved.