fuel pressure question (or problem)

jhonda

Member

Jul 22, 2003

125

1

16

Huntersville NC

Nov 20, 2007

#1

• Nov 20, 2007

• #1

I checked my fuel pressure today due to the lack of power and increased water temp....anyways intiall pressure at idle is 30psi if I rev it up it goes to 40....is this right or am I doing it wrong. Any imfo or ideas??
Thanks
Jason

 

bill302

Active Member

Nov 2, 2005

2,131

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alabama,gadsden

Nov 20, 2007

#2

• Nov 20, 2007

• #2

remove the vacuum line to the regulator and check pressure...it should read 38-40 psi with the vacuum line removed...do you heve an adjustable fuel pressure regulator?

 

cenok is family

15 Year Member

Jun 25, 2003

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79

Norman, Ok

Nov 20, 2007

#3

• Nov 20, 2007

• #3

bill302 said:

remove the vacuum line to the regulator and check pressure...it should read 38-40 psi with the vacuum line removed...do you heve an adjustable fuel pressure regulator?

Click to expand...

+1

 

B

BYRDPE

Founding Member

Nov 4, 1998

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37

Memphis,Tn.

Nov 20, 2007

#4

• Nov 20, 2007

• #4

Does the vacuum line need to be plugged when setting fuel pressure?

 

jhonda

Member

Jul 22, 2003

125

1

16

Huntersville NC

Nov 20, 2007

#5

• Nov 20, 2007

• #5

I do but it is not installed. I am just testing the orginal one. I know it is burning real rich at start up and sometimes at idle and everyonce and awhile when I get on it.

 

R

rossford

New Member

Oct 13, 2007

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Nov 21, 2007

#6

• Nov 21, 2007

• #6

you have to ck the amount of fuel coming out also,a car low on gas can have good fuel pressure. engine running hot doz not sound like fuel, also ck back pressure,cloged cat maybe,timming,ect.

 

jhonda

Member

Jul 22, 2003

125

1

16

Huntersville NC

Nov 21, 2007

#7

• Nov 21, 2007

• #7

well my car has a offroad x pipe. And timing is at 15degrees

 

white99gt

Founding Member

Aug 8, 2000

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stockbridge,Ga(near atlanta)

Nov 21, 2007

#8

• Nov 21, 2007

• #8

jhonda said:

I do but it is not installed. I am just testing the orginal one. I know it is burning real rich at start up and sometimes at idle and everyonce and awhile when I get on it.

Click to expand...

How do you know its rich? Wideband?

A aftermarket fuel pressure regulator is a waste ,if the car is running properly its not needed.

I ran a stock regulator with a 255lph high pressure pumps and no "richness" and on my new combo im still running a stock regulator.

 

jhonda

Member

Jul 22, 2003

125

1

16

Huntersville NC

Nov 21, 2007

#9

• Nov 21, 2007

• #9

black smoke, smell

 

white99gt

Founding Member

Aug 8, 2000

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stockbridge,Ga(near atlanta)

Nov 21, 2007

#10

• Nov 21, 2007

• #10

black smoke.Even if its running right you will see that sometimes at WOT.Smell doesnt mean its running rich,if it SMELLS rich its actually running LEAN..

 

jhonda

Member

Jul 22, 2003

125

1

16

Huntersville NC

Nov 21, 2007

#11

• Nov 21, 2007

• #11

Im not saying your wrong but I have never heard that before, my 90f150 smelled rich burned rich I know because the exhaust would blow a steady blue flame out on the hwy if i dropped it from 4th to 3rd and stomped on it

 

jrichker

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Nov 22, 2007

#12

• Nov 22, 2007

• #12

Any setting or testing of the fuel pressure needs to be done with the fuel pressure vacuum line disconnected and the vacuum line plugged.

 

jhonda

Member

Jul 22, 2003

125

1

16

Huntersville NC

Nov 22, 2007

#13

• Nov 22, 2007

• #13

well turned out to be the fuel pressure so far

I checked my fuel pressure with the stock regulator and it was running 44lbs of pressure. Put new regulator on adjusted to 40lbs and everything seems good so far