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Old 01-15-2012, 08:26 AM   #1
baldtrey
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Default Fuel pressure

Whats up guys? Question of the day is... 1997 Discovery 4.0 V-8 what should the fuel pressure run. Second is there any way to test the fuel pressure regulator with out just replacing it?
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Old 01-15-2012, 09:07 AM   #2
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Fuel pump delivery pressure 2.4-2.6 bar (34-37 lbf/in 2 )

Not sure on testing the regulator, generally it works or you get to much pressure.
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When working with GEMS vehicles. Never try to locate a misfire by pulling plug leads off - pull the injector connector instead. Otherwise you can blow up the ECU.

Secondly never swap ECUs between vehicles to test them, because both vehicles and ECUs may stop working, and you'll have to have them all reset by a franchised LR dealer (ouch!).
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Old 01-15-2012, 10:25 AM   #3
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Thanks Joey. I thought so from what I have found online. The original pump was running about 10 to 12 pounds low.. I did the rebuild with the generic GM fuel pump. Seams to be doin fine. Do you have any other ideas what would cause a power loss after drivin about 20 min. I've now done fuel pump, fuel filter, alternator, battery, crank shaft sensor, most all vacuum hoses, cleaned stepper motor. The only code I was gettin was 1191 or fuel rail performance haven't driven it much since new pump for check engine light to come on. Weriod thing is when it starts hesitating if the
Check engine light has been reset the hesitating doesn't make the light come on. Any help will be greatly appreciated
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Old 01-15-2012, 10:31 AM   #4
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Two things I would look for... Corrosion in the fuse box in the engine bay, and check the Coil packs to ensure they are not breaking down... you will normally visibly see swelling or cracking on the coil packs.
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http://www.customroveraccessories.com Home of the New D2 horn buttons!

http://www.usarovers.com/ (call for Rover parts ask for Nathan 502-222-5859)

Rover Radio issues or IPOD Adapters http://home.valornet.com/splacket/index.htm

EAS fault http://www.rswsolutions.com

When working with GEMS vehicles. Never try to locate a misfire by pulling plug leads off - pull the injector connector instead. Otherwise you can blow up the ECU.

Secondly never swap ECUs between vehicles to test them, because both vehicles and ECUs may stop working, and you'll have to have them all reset by a franchised LR dealer (ouch!).
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Old 01-15-2012, 11:07 AM   #5
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Oh yeah. Had a misfire code changed the two center coils and fixed the misfire and cleared the code about a month ago.,
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