Fuel Pressure confusion
#1
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Fuel Pressure confusion
Well since few days my car was bogging at random times. Did almost everything but later when i restricted the pipe going to tank after Fuel Pressure Regulator the car seemed to work fine and is working great till that (added the clamp to restrict fuel flow). This was a temporary solution just to find the problem.
Fuel pressure readings were
At Idle (750) 29 PSi
With Vacum Hose removed from FPR (WOT Condition) 40 PSi
Some dude says that this is normal ratings but I suppose the pressure should always stay 40+ psi no matter what idle or WOT.
What do you say is ideal Fuel Pressure for Idle and WOT?
Engine is 1.8 liter F18B similar design as F22B
Fuel pressure readings were
At Idle (750) 29 PSi
With Vacum Hose removed from FPR (WOT Condition) 40 PSi
Some dude says that this is normal ratings but I suppose the pressure should always stay 40+ psi no matter what idle or WOT.
What do you say is ideal Fuel Pressure for Idle and WOT?
Engine is 1.8 liter F18B similar design as F22B
#2
Honda-Tech Member
Re: Fuel Pressure confusion
Idle with the hose disconnected = 38-46psi
Idle with hose connected = 30-37psi
So at WOT did you notice if you had any vacuum? 40psi is between 38-46psi range with no vacuum. It is a bit on the low side of the range. That's where your actual vacuum/MAP reading would come in handy.
Idle with hose connected = 30-37psi
So at WOT did you notice if you had any vacuum? 40psi is between 38-46psi range with no vacuum. It is a bit on the low side of the range. That's where your actual vacuum/MAP reading would come in handy.
#3
MM Gruppe B
Re: Fuel Pressure confusion
Well since few days my car was bogging at random times. Did almost everything but later when i restricted the pipe going to tank after Fuel Pressure Regulator the car seemed to work fine and is working great till that (added the clamp to restrict fuel flow). This was a temporary solution just to find the problem.
Most likely the FPR is going bad.
If the pressure was raised by regulating the pressure manually and the car ran better it appears the FPR is no longer restricting fuel flow properly.
#4
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Re: Fuel Pressure confusion
@GhostAccord at idle I am getting 1.2 volts from MAP and 17.2 KPa of Vaccum.
Here is my scan stats at idle without restrictions.
@MAD_MIKE some one said to me you are restricting and car would run rich so i pulled out spark plugs..... they were light brown. Some even did not had any color they ere orignal sort of colored
Here is my scan stats at idle without restrictions.
@MAD_MIKE some one said to me you are restricting and car would run rich so i pulled out spark plugs..... they were light brown. Some even did not had any color they ere orignal sort of colored
#5
MM Gruppe B
Re: Fuel Pressure confusion
Typically spark plugs should be a 'cocoa brown'(like the spark plug has cocoa powder on it) color to them when the air/fuel ratio is optimum. Not wet/black/darkbrown as that is running rich, and not white/bare porcelain as that is running lean.
Note #14
This image does not show as many variants of 'good/normal' plugs, but you get the idea. Not wet/black/sooty/clean/etc a nice light brown coating is about where you want to be.
To properly check spark plugs you really need a lit magnifying glass as a ring forms on the outside of the center electrodes porcelin insulator when proper combustion happens. If you have good eyesight you may be able to see the ring.
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