Variable steering resistance help

[Trigger_guard]

Yeah. So my speed sensitive steering thing quit working after an engine swap.

Does anyone have any insight into this system. How it works. Wire diagrams. What sensors it needs. And just generally what I could have done under the hood to break it

98 k1500 5.7

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[andy396]

Was it a direct engine and controls swap? If not, what’s changed? Same pump or different pump?

 

[Trigger_guard]

Was it a direct engine and controls swap? If not, what’s changed? Same pump or different pump?

It was a long block swap. So I'm using the original ps pump. In fact I never even drained the fluid

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[andy396]

Assuming you double checked that the connector is still seated good at the pump end, I would check to make sure the 2 wires that run from the pump to the EVO/Passlock module up under the middle of the dash didn't get damaged during the swap. If that's all good, my guess would be a coincidental failure of the speed sensitive steering valve.

 

[df2x4]

The EVO sensors on the column tend to go bad as well. If all the wiring is good then that would be my first suspect.

 

[Trigger_guard]

Ah. I didn't know there are wires going to the pump. That may be my issue right there

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[andy396]

That’ll do it. Let us know what you find.

 

[Trigger_guard]

That’ll do it. Let us know what you find.

Will do when I get off work. But I'd say it's not plugged in then. Along with the other 90% of the harness

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[Trigger_guard]

I just want to note that appearenty this EVo system was a flop , nobody makes a replacement pump. And the internet as a whole just hates it.

But I absolutely love the hell out of it.
I mean who are these people that need to whorl the wheel around with 1 finger at 80mph

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[df2x4]

I like the EVO on my '97s as well. It has issues occasionally but I've always opted to fix it rather than get rid of it. The only time that it bugs me when everything is working properly is if I'm doing donuts or sliding around to the point that wheel speed does not equal actual speed. Even then it's manageable if you know what to expect, though.