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#2
11-18-2006, 11:32 PM
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Re: 91 Plymouth Voyager fuel pump pressure psi?
Quote:
It calls for 39 lbs of fuel pressure. Good Luck MT
__________________
Remember proper testing gives us the answer to many problems. MT 
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#3
11-19-2006, 08:27 AM
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Re: 91 Plymouth Voyager fuel pump pressure psi?
One thing I want to point out is that fuel pressure is controlled by the fuel pressure regulator on the fuel rail. The regulator has a vacuum hose attached. The regulator will vary fuel pressure in the rail depending on the vacuum signal. You should see 39 psi on the fuel rail at idle. If you apply vacuum to the regulator, you should see an increase in fuel pressure.
Now, if your fuel pressure is below 39 psi at idle, this doesn't immediately suggest a bad fuel pump. You must next put a vacuum pump on the regulator and see if the pressure will vary with vacuum applied. If pressure doesn't change with vacuum applied, the regulator is bad and should be replaced. And replacing a regulator is easier than a fuel pump.
__________________
"This car may be old, but it will still climb Kirker Pass at 110!" 1962 Chrysler 300 2-door hardtop/1964 Chrysler 300-K convertible/1964 Chrysler Newport 4-door sedan/1964 Chrysler 300-K hardtop with Firepower 390/2x1964 Chrysler 300-K hardtop/1964 Chrysler 300 convertible/1964 Chrysler "Silver 300-K" with factory 4-speed/1964 Chrysler New Yorker Salon/1980 Dodge D-50 Sport/1986 Lincoln Continental/1989 Honda Accord DX/1989 Lincoln Mark VII BB/1991 Dodge Shadow ES convertible
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#4
11-19-2006, 09:48 AM
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Re: 91 Plymouth Voyager fuel pump pressure psi?
Quote:
Actually the 39 lbs fuel pressure I posted was from the fuel pump performance table. Here is a good test and check on it. http://members.troublecodes.net/crunch/91carfuelt.pdf
__________________
Remember proper testing gives us the answer to many problems. MT
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