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Author Topic: P/S pump specificsations  (Read 1560 times)

Offline captin_urbis

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P/S pump specificsations
« on: 27 August 2013, 09:55 »
Hi guys,

I have a question for you lot,

what is the pressure output of the power steering pump on a mk3 on idle? also the same for a mk2 pump....

iv fitted a mk3 subframe and engine to my jetta, inc p/s from a diesel mk3. my issue is that during idle speed there is no assistance but at greater RPM there is assistance.

I believe i have fitted a mk2 pump and the pressure is different through the lower rpm. I have even had a new rack and pump so i am discounting these having any operating issues.

Thanks guys.
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Offline itavaltalainen

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Re: P/S pump specificsations
« Reply #1 on: 27 August 2013, 13:59 »
part number of components you have fitted??

could well be that the pulleys are different - i.e. gives you a different gearing ratio and pump does not get enough rpm at idle
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2019 Seat Leon ST FR DSG 135kW - eclipse orange - 23k miles

Offline captin_urbis

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Re: P/S pump specifications
« Reply #2 on: 27 August 2013, 20:44 »
That was not something I had considered. I will double check when I get home, thanks.
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Offline dennis10

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Re: P/S pump specificsations
« Reply #3 on: 09 October 2013, 14:43 »
Double check that the PAS pump isn't faulty.

I upgraded all my mk2 16v alternator/PAS/battery cables etc to mk3 items last year and I had this exact issue with the PAS pump.

Turned out the pump was faulty and the valve inside was sticking open - so in effect it wasn't pumping properly.  It had no PAS at idle and low speeds, but gave PAS and pumped properly when on the throttle at higher RPM. 

A replacement pump sorted this.  :smiley:
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