The Mitsubishi Galant VR-4 Forum
Galant VR-4 Forums » Galant VR-4 » Technical Discussions » What would the symptoms be of a bad pressure switch.....
Previous thread Next thread

What would the symptoms be of a bad pressure switch.....


Galant VR-4 org Post #: 899551 posted 05/17/10 04:03 PM     Remind Me!  Send Private Message   Edit Post      
On the power steering pump. Just curious, I think mine does not work, and if that's the case, how would that effect the idle and running of the car?

#802/1000 Daily Driver SOLD!
1960 Austin Healey Bugeye

Posts: 1150 | From: Chico, CA | Member Since: 05/29/04 | IP: ( | Report this post to a Moderator


Galant VR-4 org Post #: 899561 posted 05/17/10 04:30 PM     Remind Me!  Send Private Message   Edit Post      
I'm pretty sure as you turn the wheel, sitting still in particular, the idle would dip down as the ISC does not compensate because the ECU wouldn't know the power steering is being loaded up. Although I'm assuming it fails in a way that it gives a no pressure signal.

-Jon Barnes
#580/2000 (Long Gone)
#908/1000 Black (Sold)
#237/2000 White

Posts: 6249 | From: Richland, WA | Member Since: 02/09/03 | IP: ( | Report this post to a Moderator

well bread and nobly conceived

Galant VR-4 org Post #: 899565 posted 05/17/10 04:35 PM     Remind Me!  Send Private Message   Edit Post   
I assume that if the ECU knew the power steering was in use it would raise the rpms preemptively. With it broken you blind-side the ECU by suddenly bogging the engine with the load from the PS pump. Then the rpms rise again as the ECU tries to compensate for the bog (w/o knowing what's causing it). Then when you let off the rpms would rise farther as you remove the load on the engine without telling the ECU what you're doing. Then they stabilize again as the ECU compensates to get rpms under control (still not knowing what's going on).

Roger B. Scott
'91 Belize Green

Posts: 3295 | From: Dundee, Scotland, UK | Member Since: 11/18/03 | IP: ( | Report this post to a Moderator

Pages: 1
Previous thread Next thread

Extra information
1 registered and 17 anonymous users are browsing this forum.

Galant Moderator:  curtis, steve, atc250r, jcgalntvr4-244, cheekychimp, jepherz, Rausch, toybreaker 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled

Thread views: 4797

Rate this thread

News & Events: News | Events
Galant VR-4: Newbies | General VR4 Discussions | Technical Discussions | How To and Info Archive
Marketplace: Parts For Sale | Cars For Sale | Good Guys | Bad Guys
Community: Members' Showcase

Contact Us | Privacy statement

Generated in 0.195 seconds in which 0.186 seconds were spent on a total of 14 queries. Turbo powered.

Hertz's Galant VR-4 Page