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Guest Message by DevFuse
 

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Fuel pressure release?


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4 replies to this topic

#1 SubaRube

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Posted 11 October 2003 - 04:44 PM

I was going to throw a new fuel filter on my spfi, and my old Haynes doesn't say much about it. The guy at the parts store said I have to release the fuel pressure. Is he correct, how do I do it?

#2 Skip

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Posted 11 October 2003 - 05:34 PM

there is pressure stored in the system, remove the clamp, wrap a rag around the hose to filter junction then twist and yank - it will squirt a bit of fuel - No open flames please.

#3 Hondasucks

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Posted 11 October 2003 - 05:41 PM

Pull the fuse for the fuel pump and crank the engine over for 30 seconds. If you can't find the fuel pump fuse, go underneath the rear of the car and disconnect the fuel pump. You dont' want to just yank teh line off because the fuel is in there at 40-70 PSI, and it will spray EVERYWHERE.

#4 SubaRube

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Posted 11 October 2003 - 05:49 PM

Thanks guys.:D

Hey Hondasucks, where is the fuse on your 87 turbo?

#5 Skip

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Posted 12 October 2003 - 06:08 AM

Yes, Honda, (Subaru master) please do tell us of this fuse?
BTW it is a fusible link - the same that controls the ECU -disconnect and crank??
The ECU is at this point powerless and will not open the injector, crank till the cows come home - it will still have pressure.


40 to 70 psi?? Honda's maybe, Bosch CIS yes, on this car - come on Master - it's only 21 psi, after sitting the residual pressure may be only 15.

Squirt everywhere - ???

The only pressure is acumulated in the dampers and is on the order of milliliters not gallons or ounces.

Crawl under the car find the fuel pump and try to pull the connector apart, then start the car this will de pressurize it.

please excuse the sarcasm, I have not had my medication yet today




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