Power Steering

[AvgJoe]

Does anyone have a tried and true method of curing the almost non-existent power steering at idle? I have a 1994 K1500 with the factory style saginaw pump. Nothing fancy, no hydroboost or big tires. Still running the LT245-16s. I have changed the pump 3-4 times over the truck's life and I always have the same issue. Even with the "new" pumps. I have to hit a gas a bit to pick up the idle in order to static steer. Even at idle and creeping can be a struggle. I saw somewhere that the pump off of a G30 had better pressure at idle so that was the last one I installed. It's still the same. I have not been able to find a smaller diameter pulley or if that would even help. It does have a relatively new front end. Ball joints, ties rods, idler arm, CV shafts, hub bearings. All newish. I've always gone for the stock look but am willing to give that up to park the car in a parking spot at the grocery store without making a 40 point turn. Anyone have any suggestions?


Thanks

 

[evilunclegrimace]

What is your idle speed? Did you replace the hoses when you replaced the pump? It is possible that one of the hoses has failed internally and is causing a restriction.Are the hoses routed correctly?Do you have the proper pressure relief valve in the pump and is it installed correctly?Is your pulley slipping on the pump shaft? Is your serpetine belt tensioned correctly/stretched?

 

[cjk04]

Idle speed is a 750 and the hoses have been replaced. As far as the pressure relief valve, whatever was in the pump would is what I got. I never pulled it out. The tensioner has been replaced a couple times but no change. The belt also gets replaced about every 2 years. There no evidence of the belt slipping. I would think the AC compressor would be slipping but everything else seems to be okay.

 

[Schurkey]

How do you know it's a pump problem and not a steering-gear problem? 3--4 replacement pumps and no change? Probably NOT the pump.

What actual diagnosis have you done?

 

[cjk04]

The pumps were changed due to them leaking or locking up. The original locked and literally snapped the belt before I could it shut down in a safe spot. Other than turning the steering wheel while watching the pitman arm, is there another procedure for testing the steering gear? This one isn't perfect but the mild play I have in the steering wheel is acceptable IMO. This truck does have 366K on the clock but has been very well maintained. Again, I am opinionated.

 

[Schurkey]

The pumps were changed due to them leaking or locking up. The original locked and literally snapped the belt before I could it shut down in a safe spot.

So, again: You've failed multiple pumps. SOMETHING ELSE is probably causing the failures.

Connect a proper PS pressure gauge tool, find out what's going on. Download the service manual set for your vehicle from the links in the Sticky thread section of the Engine forum, follow the published diagnostic procedure.

Wild Guess with no evidence: Extreme high pressure due to a fault in the plumbing, or in the steering gear (assuming you're replacing the pressure regulator along with the pumps, and not re-using the same one over and over.)

 

[GoToGuy]

What tire pressure are you using in front tires. And is your tire pressure gauge accurate.

 

[scott2093]

Is your serpetine belt tensioned correctly/stretched?

This had me wondering. My truck has the automatic tensioner. When I was replacing my son's Kia serpentine belt, the one listed for his car was way too small in the continental brand. Too small in the Duralast brand.... Actually had to get the next size up to make it work. Lot of similar complaints online. Literally close to 1/2" short on the Continental belt. Not talking about not knowing how to install the belt. They're literally different sizes for the supposed same belt and the tolerances are questionable.

I've always suspected the belt on mine is too tight. Can't get it to roll over much when trying to twist it. Does the automatic tensioner work when the belt is too small? Seems like it would only work the other way. And why is tensioner triggering a spell check?

 

[Oakr11]

Does anyone have a tried and true method of curing the almost non-existent power steering at idle? I have a 1994 K1500 with the factory style saginaw pump. Nothing fancy, no hydroboost or big tires. Still running the LT245-16s. I have changed the pump 3-4 times over the truck's life and I always have the same issue. Even with the "new" pumps. I have to hit a gas a bit to pick up the idle in order to static steer. Even at idle and creeping can be a struggle. I saw somewhere that the pump off of a G30 had better pressure at idle so that was the last one I installed. It's still the same. I have not been able to find a smaller diameter pulley or if that would even help. It does have a relatively new front end. Ball joints, ties rods, idler arm, CV shafts, hub bearings. All newish. I've always gone for the stock look but am willing to give that up to park the car in a parking spot at the grocery store without making a 40 point turn. Anyone have any suggestions?


Thanks

Might try a pump out of a P 30 chassis. P 30 was the motor home chassis. Some of them were very heavy on the front axle. We used to put plastic air bags in the front coil springs because they wallow down the road without them.

 

[Bradster68]

So, again: You've failed multiple pumps. SOMETHING ELSE is probably causing the failures.

Connect a proper PS pressure gauge tool, find out what's going on. Download the service manual set for your vehicle from the links in the Sticky thread section of the Engine forum, follow the published diagnostic procedure.

Wild Guess with no evidence: Extreme high pressure due to a fault in the plumbing, or in the steering gear (assuming you're replacing the pressure regulator along with the pumps, and not re-using the same one over and over.)

Pressure gauge tool? Is this any that'll fit inline or do they make a special one for pumps? My hydro boost system only gives power steering when cold. After warm up it's gone.