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Old 12-03-2021, 03:00 PM   #8
fdryer
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Join Date: Jan 2006
Location: NYC
Posts: 45,789
 

2003 L-Series 3.0L Sedan
Default Re: Power steering components diagram

Not an expert on power steering but there has never been a report within these forums of a power steering pump failure locking up to cause an engine stall. A general search of the internet may or may not reveal pwr steering failure contributing to engine problems.

A power steering hose leak is downstream relative to either the pressurized side feeding the steering rack or return hose. On the pressure side, leaking fluid would lower pressure as the pump continues to run until loss of fluid occurs. This would lower pump loads on the engine belt drive system. A return hose leak doesn't affect pump loads until loss of fluid occurs, again lowering pump loads on the engine. In practical terms, the pump (unless mechanically jammed from unforeseen reasons) losing oil simply lowers power demand from the engine.

Engine stalling, if directly related to the power steering pump, should be easily diagnosed by removing the drive belt and starting the engine for a brief run. The water pump won't run and a short engine run of less than a few minutes won't harm the engine. Manually rotating the pump by hand should result in some pressure against turning as the pump develops hydraulic pressure but shouldn't prevent turning.

You may have two separate problems - the hose damage and as yet undiagnosed problem of engine starting/stalling.
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