04-26-2019, 02:23 PM
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#1
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Join Date: Jan 2012
Location: darkside of the moon
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Senior Member
Join Date: Jan 2012
Location: darkside of the moon
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Help needed- Fuel pressure test persistent p0174
So, have been digging around for some time now, no luck.
my truck has a persistent p0174 code - lean condition, i have cleaned the maf and TB, changed air filter, inspected for vacuum leaks, no dice.
am now suspecting the fuel pump/filter, but would want to test the fuel rail pressure before attempting to change the pump. bought the fuel pressure test kit off amazon, and have looked all over the engine bay, but i cannot locate the test port for to hook up the pressure test kit,
my LTFT bank 2 is 37%, while bank 1 is 18%
would be grateful if someone can direct me to a picture of video showing where or how to hook up the pressure test kit on a 2005 v6 4runner
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2005 v6, galactic grey 4wd auto : pioneer avh 4400bh dvd hu, pyle reverse cam
2003 rav4 titanuim silver 4wd auto...... sold
2004 rav4 titanuim silver 4wd auto : pionneer avhx 5500bt hu, pyle reverse cam
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05-04-2019, 02:09 PM
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#3
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Join Date: Dec 2007
Location: San Jose, CA
Posts: 723
Real Name: Mike
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Join Date: Dec 2007
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Posts: 723
Real Name: Mike
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Have you tried replacing the gas cap yet? If not, you should. The rubber seal tends to crack over time. Buy OEM, the cheap ebay/amazon don't seal good.
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2003 V6 BLACK SR5 4X4-Runner
OB #1334
https://www.instagram.com/ob_1334/?hl=en
Dad's Travel Service.
We drive around till we find it. No map's needed!
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05-04-2019, 11:07 PM
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#4
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Join Date: Mar 2018
Location: Moorpark CA
Age: 42
Posts: 477
Real Name: Elliott
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Member
Join Date: Mar 2018
Location: Moorpark CA
Age: 42
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Real Name: Elliott
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there are two fuel lines near the brake master cylinder. Black cover is return, white cover is feed. You want feed. Those fuel trims being what they are, my recent experience with this makes me feel like your issues are related to the specific engine bank. If it were fuel pressure, I would think you would get lean codes for both engine Banks. Is your exhaust rich smelling?
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2007 SR5 V6 4WD 205k, Titanium Metallic. 5100s, OME 885/895, extended rear links, ST Maxx 255/75 R17 on 17x8s, mud flap delete,TB spacer, Spectre CAI, DRL delete, HCF delete, DAC delete, K&N cabin filter, TPMS bypass, Fog light mod, USB galore, dash cam, LED lights all over, rear bumper lights, cbi ditch light brackets w/lights, atrac off, OBA w/2 gallon tank/hidden hook up, Trailgear welded sliders, Rocksteady skids, custom swing-out, 3⁰, SE hood w/working vent, Sprint booster, JET MAF, Kenwood TM-V71a w/motorized antenna, custom dual battery, custom roof rack/lights, custom TRED mount, external 12v, rear diff breather, pck, Freedom UCAs, custom stereo, Aluminum rad, trans cooler, 240A alternator...for now...
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05-06-2019, 04:44 PM
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#5
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Quote:
Originally Posted by 81runner
there are two fuel lines near the brake master cylinder. Black cover is return, white cover is feed. You want feed. Those fuel trims being what they are, my recent experience with this makes me feel like your issues are related to the specific engine bank. If it were fuel pressure, I would think you would get lean codes for both engine Banks. Is your exhaust rich smelling?
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yeah, thanks seen the fuel lines, and unclipped it, yes, my exhaust smells rich at idle, and a p0430 - catalyst code pops up after a >50miles highway drive
below is my freeze frame data.
Freeze frame report generated by Torque for Android
================================================== =======
Vehicle VIN: JTEBUXXXXXXXXXXXXXX
Vehicle Manufacturer: Toyota
Vehicle Calibration ID: 33535000
Freeze frame information:
------------------
Fuel Trim Bank 1 Short Term = -1.562 %
Fuel Trim Bank 1 Long Term = 14.062 %
Fuel Trim Bank 2 Short Term = 0.781 %
Fuel Trim Bank 2 Long Term = 37.5 %
Engine RPM = 875 rpm
Speed (OBD) = 7.456 mph
Timing Advance = 15 °
Intake Air Temperature = 123.8 °F
Mass Air Flow Rate = 6.62 g/s
Throttle Position(Manifold) = 17.255 %
Run time since engine start = 133 s
O2 Sensor1 Equivalence Ratio = 1.004
O2 Sensor5 Equivalence Ratio = 0.995
Distance travelled since codes cleared = 1.243 miles
Barometric pressure (from vehicle) = 14.504 psi
Catalyst Temperature (Bank 1,Sensor 1) = 839.3 °F
Catalyst Temperature (Bank 2,Sensor 1) = 839.3 °F
Catalyst Temperature (Bank 1,Sensor 2) = 247.64 °F
Catalyst Temperature (Bank 2,Sensor 2) = 247.64 °F
Voltage (Control Module) = 13.164 V
Engine Load(Absolute) = 18.824 %
Commanded Equivalence Ratio(lambda) = 1.005
Relative Throttle Position = 0 %
Absolute Throttle Position B = 49.02 %
Accelerator PedalPosition D = 16.078 %
Accelerator PedalPosition E = 32.157 %
End of report.
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2005 v6, galactic grey 4wd auto : pioneer avh 4400bh dvd hu, pyle reverse cam
2003 rav4 titanuim silver 4wd auto...... sold
2004 rav4 titanuim silver 4wd auto : pionneer avhx 5500bt hu, pyle reverse cam
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05-06-2019, 10:07 PM
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#6
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Join Date: Mar 2018
Location: Moorpark CA
Age: 42
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Real Name: Elliott
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Member
Join Date: Mar 2018
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Age: 42
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I would be looking at the o2 sensors and a/f sensor for bank 2. I had bad fuel trims on both banks with a bad fuel pump. It would start out low, and as the pump got hot, the trims would go up. Didn't help I also had fouling injectors on both heads so sometimes it would go waay out of whack. But my exhaust was never rich, which led me to believe the fuel delivery was lacking, which it was. In your case, rich exhaust means delivery works fine, it's the sensor going nuts causing you to dump excess fuel and probably make the engine run a little rough.
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2007 SR5 V6 4WD 205k, Titanium Metallic. 5100s, OME 885/895, extended rear links, ST Maxx 255/75 R17 on 17x8s, mud flap delete,TB spacer, Spectre CAI, DRL delete, HCF delete, DAC delete, K&N cabin filter, TPMS bypass, Fog light mod, USB galore, dash cam, LED lights all over, rear bumper lights, cbi ditch light brackets w/lights, atrac off, OBA w/2 gallon tank/hidden hook up, Trailgear welded sliders, Rocksteady skids, custom swing-out, 3⁰, SE hood w/working vent, Sprint booster, JET MAF, Kenwood TM-V71a w/motorized antenna, custom dual battery, custom roof rack/lights, custom TRED mount, external 12v, rear diff breather, pck, Freedom UCAs, custom stereo, Aluminum rad, trans cooler, 240A alternator...for now...
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05-08-2019, 03:34 AM
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#7
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Senior Member
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Quote:
Originally Posted by 81runner
I would be looking at the o2 sensors and a/f sensor for bank 2. I had bad fuel trims on both banks with a bad fuel pump. It would start out low, and as the pump got hot, the trims would go up. Didn't help I also had fouling injectors on both heads so sometimes it would go waay out of whack. But my exhaust was never rich, which led me to believe the fuel delivery was lacking, which it was. In your case, rich exhaust means delivery works fine, it's the sensor going nuts causing you to dump excess fuel and probably make the engine run a little rough.
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THanks,
any specific way of knowing which sensor is bad?, the AF/upstream sensor is over $100, while the o2/downstrean sensor is about $40, would not want to bblindly throw away cash by swapping out the two,
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2005 v6, galactic grey 4wd auto : pioneer avh 4400bh dvd hu, pyle reverse cam
2003 rav4 titanuim silver 4wd auto...... sold
2004 rav4 titanuim silver 4wd auto : pionneer avhx 5500bt hu, pyle reverse cam
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06-11-2019, 04:08 PM
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#8
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Senior Member
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Join Date: Jan 2012
Location: darkside of the moon
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Join Date: Jan 2012
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Quote:
Originally Posted by 81runner
there are two fuel lines near the brake master cylinder. Black cover is return, white cover is feed. You want feed. Those fuel trims being what they are, my recent experience with this makes me feel like your issues are related to the specific engine bank. If it were fuel pressure, I would think you would get lean codes for both engine Banks. Is your exhaust rich smelling?
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so far i have changed the fuel tank cover, changed the drivers side 0xygen sensor, yet the p0174 still refuses to go away, my fuel trims are 36% for bank 2, and 14% for bank 1.
i attempted to do the fuel rail test, disconnected the white&black tab fuel lines, near the brake abs, turned on the ignition, but my guage remained at zero, i disconnected the guage to see if fuel will spray out , but nothing happened, pls what am i doing wrong???
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2005 v6, galactic grey 4wd auto : pioneer avh 4400bh dvd hu, pyle reverse cam
2003 rav4 titanuim silver 4wd auto...... sold
2004 rav4 titanuim silver 4wd auto : pionneer avhx 5500bt hu, pyle reverse cam
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06-11-2019, 06:33 PM
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#9
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Join Date: Aug 2017
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Quote:
Originally Posted by earthrealm
i attempted to do the fuel rail test, disconnected the white&black tab fuel lines, near the brake abs, turned on the ignition, but my guage remained at zero, i disconnected the guage to see if fuel will spray out , but nothing happened, pls what am i doing wrong???
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See section 2 of the PDF link I posted...you need to activate the fuel pump. If you don't have a bidirectional scantool to manually switch the pump on, you'll need to plumb the gauge into the fuel line as shown and test w/ the engine running (after ensuring no fuel leaks).
If you have the fuel line dead-headed into the gauge, you may be able to read pressure while cranking or by removing the fuel pump relay and using a jumper wire. Again, ensuring no fuel leaks under pressure.
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06-12-2019, 02:28 AM
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#10
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Senior Member
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thanks for the heads up, am wondering if good ol techstream could be used inplace of the SST.
last option, i am considering simply replacing the fuel pump+filter, and not bother testing the fuel rail, seeems its too much trouble
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2005 v6, galactic grey 4wd auto : pioneer avh 4400bh dvd hu, pyle reverse cam
2003 rav4 titanuim silver 4wd auto...... sold
2004 rav4 titanuim silver 4wd auto : pionneer avhx 5500bt hu, pyle reverse cam
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