Power steering issue

[Ray Reynolds]

I just finished my LS truck motor swap in my jimmy and I used the pump that was on the 5.3. At low rpm it has no power steering at all. I have to rev the motor up to get it to steer. Any ideas? Pump is brand new, lines are brand new

 

[skunked]

likely air in the system still.

 

[Ray Reynolds]

likely air in the system still.

See I thought that to... Went lock to lock and let it run but still does it

 

[skunked]

See I thought that to... Went lock to lock and let it run but still does it

it takes several heat cycles sometimes, both with the engine on and off going lock to lock with the wheels off the ground.

 

[Ray Reynolds]

it takes several heat cycles sometimes, both with the engine on and off going lock to lock with the wheels off the ground.

ok.. I'll give it a shot. Didn't do it with the engine off

 

[Ray Reynolds]

Would a PS cooler be beneficial?

 

[skunked]

Would a PS cooler be beneficial?

yes and most will say it's a necessity with hydro assist.

 

[Wes Harden]

Was pump new or remanufactured?
If reman I think pump clearances are sloppy, and doesn't build pressure till everything gets warm

 

[Ray Reynolds]

Was pump new or remanufactured?
If reman I think pump clearances are sloppy, and doesn't build pressure till everything gets warm

Supposedly new

 

[diesel4me]

Don't later model P/S pumps have a pressure sensor ?--I'm not sure if they would affect the steering assist or if they just send a signal to the ECM for whatever reason ..not up to speed on anything after the square body trucks really..

 

[skunked]

Don't later model P/S pumps have a pressure sensor ?--I'm not sure if they would affect the steering assist or if they just send a signal to the ECM for whatever reason ..not up to speed on anything after the square body trucks really..

my 97 has a weird sensor on the column which alters the pressure but I don't think the "LS" rigs had them.

 

[diesel4me]

I "think" the sensor just kicks up the idle speed a tad when the steering wheel is turned rapidly--I could be wrong though..

 

[skunked]

I "think" the sensor just kicks up the idle speed a tad when the steering wheel is turned rapidly--I could be wrong though..

Never heard of it. I just replaced my PS pump on my 02 Tahoe last month and there was nothing special about it.