Solenoid Resistance? Different in FSMs.

[Ceddy]

I'm trying to find the proper resistance for the 2G solenoids, specifically the EGR.

My 97 Talon FSM says 36-44 ohms.

Eclipse 97-99 FSM PDF (98 I Think) says 36-44 ohms.

You must be logged in to view this image or video.

Eclipse 99 FSM says 62-74 ohms.

You must be logged in to view this image or video.

Anyone know whats going on here? Did they switch solenoids at some point?

The only solenoid I could find to test is a unknown year BCS, and its reading ~200 ohms, think its blown.

Could they have switched solenoids with the different 2G ecus?
(95-97 Motorola, 98-99 Hitachi)


This is for a boost control project I'm doing. I would like to use the lower resistance solenoid(less deadtime), but I don't want to burn up my ecus driver if it can't handle the lower resistance.


Anyone have 95-97 and a 98-99 solenoid you could test?

Or know whats going on here?



[MODs you can't upload .PNG files for some reason?]

 

[logic]

ASA gives me two part numbers for the EGR solenoid: MB957046 for 1994.01.1 through 1996.02.3, and MR187000 for 1996.03.1 through 1999.04.3.

Does that date crossover coincide with the model changeover from HC11 to H8, by any chance? (ie. H8 ECUs would have the higher-resistance unit?)

 

[Ceddy]

ECUs
97 -> 7/96-5/97

98 -> 7/97-5/98

99 -> 6/98-4/99

Seems like they switched with the 97 ecu, but those where still Motorola.
You would think a solenoid with twice the resistance would have different characteristics and you can't just swap them randomly.

I'm going to try to see if the DSM H8 and Evo8 use the same Driver IC.
If so I will use the lower resistance solenoid.

The Evo guys are so careful with impedance matching their boost solenoids, I don't know if I should be worried or not.