Did a Fuel Pressure Test=results
- Thread starter Angry7M
- Start date
He doesn't know if he has an issue at all yet....
He's just going by "feel", without some data how can it be diagnosed?
He's just going by "feel", without some data how can it be diagnosed?
Ok IJ I did the FP test during WOT with the boost at 10psi. The FP were around 37ish -40psi
From a stop it would go to 40 psi, from a roll it would go to 37ish psi..
I guess this means my Fuel pump is good
i was hoping this was the proble. Although i still feel like it dosent pull like it use too. I dont know maybe its my compression or something else........... Im getting tired of all these problems.
I forgot to mention this test was done with a new Fuel Filter,
From a stop it would go to 40 psi, from a roll it would go to 37ish psi..
I guess this means my Fuel pump is good
i was hoping this was the proble. Although i still feel like it dosent pull like it use too. I dont know maybe its my compression or something else........... Im getting tired of all these problems.I forgot to mention this test was done with a new Fuel Filter,
Last edited:
redmaro
the fuel filter, unless someone put sand in your fuel tank, would not be an issue.
Replace fuel pump.
Instead of "FEELING" get hard numbers to go by. Feeling things can be real tricky.
the fuel filter, unless someone put sand in your fuel tank, would not be an issue.
Replace fuel pump.
Instead of "FEELING" get hard numbers to go by. Feeling things can be real tricky.
figgie;1125734 said:
Yeah im going to replace it anyways but no righ now, no $$$$. Well when i took out the old fuel filter, it looked real dirty, the left over fuel in it was coming out real dirty like dirty water. I just came back and did a fuel highways pulls and it feels better.
I have a quick question, I heard that the Cold Start Injector feeds fuel when under boost. Is this true?
redmaro;1125746 said:
False
TSRM is your freind.
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?Section=FI&P=77
where oh where would it be boost controlled?
figgie;1125761 said:False
TSRM is your freind.
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?Section=FI&P=77
where oh where would it be boost controlled?
LOL thats what i heard on here from another member lol. Okay thanks for answering :biglaugh:
Guys i today while i was driving i got code 25 running lean again. I know a few of you are going to tell me to change my fuel pump, but according to the test's i performed under boost, the fuel pump seems to be doing its job. Right? I reall want to find the real problem to this. The test and results i got are in the my other posts in this thread.
So i know the fuel pump is good (pressure that is), fuel pressure regulator, im getting good pressure at idle and under load. I still loose the pressure when i turn off the engine.
The O2 sensor is like a few months old, Coolant Temp Sensor is a few months old (Toyota ECT), new fuel filter, i know i have good fuel pressure while under load. I also had the injectors cleaned while on the car.
So i was wondering is that maybe my injectors need to be removed from the engine. So that way they can fully clean the injectors in and out?
Or what else can i check?
I really want to get to the bottom of this problem, I appreciate your help. Thanks
So i know the fuel pump is good (pressure that is), fuel pressure regulator, im getting good pressure at idle and under load. I still loose the pressure when i turn off the engine.
The O2 sensor is like a few months old, Coolant Temp Sensor is a few months old (Toyota ECT), new fuel filter, i know i have good fuel pressure while under load. I also had the injectors cleaned while on the car.
So i was wondering is that maybe my injectors need to be removed from the engine. So that way they can fully clean the injectors in and out?
Or what else can i check?
I really want to get to the bottom of this problem, I appreciate your help. Thanks
Where did someone say your fuel pressure should be 37 at WOT? The GTE employs Toyota's Type A injection system. That means 36 psi at atmospheric pressure, a value which is, by no coincidence, midpoint between the TSRM spec with the engine off or running with the regulator hose disconnected (same difference). That's true whether the pump is at high speed or not, which should be a clue pressure and flow are not the same thing.
You really ought to make an effort to learn how the fuel system works. Since you've been given plenty of advice on how to find the problem yet remain confused it's clear you don't understand it. You should also, as I stated before, fix the loss of rest pressure first because it could conceivably be related to the other symptom. Unlikely, but possible. It needs to be fixed anyway.
You really ought to make an effort to learn how the fuel system works. Since you've been given plenty of advice on how to find the problem yet remain confused it's clear you don't understand it. You should also, as I stated before, fix the loss of rest pressure first because it could conceivably be related to the other symptom. Unlikely, but possible. It needs to be fixed anyway.