Question about 1994 Toyota Corolla

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REMOVE AND INSTALL FUEL TANK

I HAVE A SMALL LEAK WHERE THE METAL WAS STRESSED (I CAN SEE STRESS CRACKS) . I TRIED THE FUEL TANK REPAIR KITS AND IT STILL LEAKS. I HAVE ORDERED A NEW TANK ON ORDER AND WOULD APPRECIATE ANY PROCEDURE INFORMATION YOU CAN GIVE ME FOR THIS REMOVAL AND INSTALLATION

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  • lfoy22 Jan 04, 2009

    A WALK IN THE PARK...THANK YOU

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  • Toyota Master
  • 6,674 Answers
  • Mike Butler
    Mike Butler Jan 04, 2009

    Welcome, Good Luck, P.S. "No Smoking" & disconnect battery.



    ha-ha, sure you know better.

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Replaced head gasket. now check engine light is on with a p0442 code. are there any evap hoses that I can inspect for cracks or damge since the gasket was replaced.


Tom, Yes, you should check all evap hoses for cracks and leaks.
Common Problems That Trigger the P0442 Code
  • Defective or damaged fuel cap
  • Distorted or damaged Fuel Tank Filler Neck
  • Small tear or puncture in the Evaporative system hose(s) and/or Carbon Canister
  • Defective Fuel Tank Sending Unit gasket or seal
  • Small split in a seam of the Carbon Canister
  • Defective Evaporative Vent Valve and/or Evaporative Purge Valve
  • Defective or damaged Fuel Tank
  • Defective Fuel Tank Pressure Sensor
  • Defective Leak Detection Pump
  • Slightly loose and/or worn clamps or hardened O-rings anywhere in the EVAP system Check the attached links,
    "I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
Engine Vacuum Leaks Tweet

https://books.google.ca/books?id=RLBuCgAAQBAJ&pg=PT523&lpg=PT523&dq=how+to+check+evap+hoses+for+cracks+and+leaks&source=bl&ots=tXENnJRaXU&sig=b78MxmS0N_fvBD0_lS0QzURuz2U&hl=en&sa=X&ved=0ahUKEwi4kpbz0LbLAhVju4MKHegzC18Q6AEITTAI#v=onepage&q=how%20to%20check%20evap%20hoses%20for%20cracks%20and%20leaks&f=false

How Diagnose Check Engine Light Code P0456 Small EVAP Emission Leak

Volvo S70 Evap Small Leak Common Problem P0442 Charcoal Canister Hose Fix

Mar 10, 2016 | 2000 Chevrolet Malibu

1 Answer

Gas seems to be coming from the top of plastic gas tank and running down the left side of the tank and dripping on the ground


I know it sounds a bit difficult but fuel leaking is serious danger so with this id siphon tank dry (don't use a drill pump ) and undo fasteners and hoses/wires that hold it too truck , lowering it to ground , a carefull inspection of approx. area of leak will tell the problem , your looking for cracks in plastic or rubber hoses , these might be very small and fine look closely
if cracks are in the tank , unless you know someone with a ultrasonic welder id replace the tank

Oct 30, 2015 | 2003 Ford Explorer Sport Trac

1 Answer

Code p0442


2005 Galant with code po442 this code is for an evap leak, a small leak, check the gas cap for any cracks in the oring and then you will need to check the evap lines, these line sometimes crack and allow vacuum to leak, this system is computer controlled to allow venting or purging.
most of the time a small evap leak may be due to a bad gas cap but other times it could be a line or rusted filler neck or other problems. the best way to find such a leak would be with an evap smoke machine, thee machine pumps smoke into fuel tank and lines for evap system and with vent valve shut the system should be air tight, then you look for smoke and where smoke is that is your leak, most repair shops have the machine, note : some leaks are so small the smoke can not be seen ,at this point soap water in a spray bottle is helpful, spray lines and other areas to see bubbles.

Jun 29, 2013 | 2005 Mitsubishi Galant

1 Answer

My trouble code is p0456 what is my problem my check egine lite is on


There is a small air leak in the vehicles Evap system. This includes the fuel cap, fuel filler neck, fuel tank, all evap lines and solenoids that could be the problem. Most common are the filler neck where the gas cap goes...sometime you can see small cracks.

Nov 26, 2012 | 2003 Ford Expedition

1 Answer

Hyundai santafe 2004 how to fix p0456...or what are ur suggestions for repair? i was advised to change the gas cap!


Here's the procedure:

Purge Control Solenoid Valve (PCSV) Line Inspection
1. Ignition "OFF".
2. Disconnect the hose leading from the PCSV to the intake manifold at PCSV.
3. Using a vacuum pump, apply specified vacuum(Approx. 15 in, Hg) to the manifold side of the valve and verify PCSV holds vacuum.
4. Ignition "ON" & Engine "OFF".
5. Install scantool and select "EVAP PURGE VALVE" on the Actuation Test mode.
6. Activates "EVAP PURGE VALVE" by pressing "STRT(F1)" key.
7. Verify PCSV release vacuum while valve is activating(should hear a faint click from PCSV).
8. Repeat this procedure 4 or 5 times to ensure PCSV reliability.
9. Is PCSV working properly?
YES
? Go to "Canister Closing Valve(CCV) Line Inspection" procedure.
NO
? Verify arrow on PCSV is pointing towards intake manifold. If it is not, reverse installation. Reinstall as necessary.
? If OK, check for cracks or damage in hose connecting PCSV and intake manifold. Repair or replace as necessary.
? If OK, test with a new PCSV and check for proper operation. If problem is corrected, replace PCSV and go to "Verification of Vehicle Repair" procedure.
Canister Closing Valve(CCV) Line Inspection
1. Return vehicle to original condition.
2. Ignition "OFF".
3. Disconnect the hose connecting Canister Closing Valve(CCV) to canister.
4. Blow air to the canister side of the valve and verify air escapes to the air filter side.
5. Turn ignition on and jumper a wire to GND(back probe) at terminal 2 of the ECM connector(CCV valve should click).
6. Blow air into hose and verify air does not escape.
7. Repeat this procedure 4 or 5 times to ensure CCV reliability.
8. Is CCV working properly?
YES
? Go to "Fuel Tank Pressure Sensor Inspection" procedure.
NO
? Check for cracks or damage in hose connecting CCV and canister. Repair or replace as necessary.
? If OK, replace CCV. If CCV was stuck closed, inspect all lines and canister for liquid fuel. Replace any contaminated components and blow out lines and go to "Verification of Vehicle Repair" procedure.
Fuel Tank Pressure Sensor Inspection
1. Start engine and install scan tool.
2. Monitor "FUEL TANK PRESSURE" parameter on the current data list with depressing increasing engine speed.
Specification : Signal value will vary between -2mmHg to 2 mmHg depending on variation in engine speed.
A. Approx. 0~2 mmHg(2.5V) at Ig. On
B. Approx. 0 mmHg at 1400rpm .
C. Approx. -2 mmHg at 4000rpm.

3. Is signal value within specification?
YES
? Go to "PCSV to Canister Line Inspection" procedure.
NO
? Check for cracks or damage in hose connecting canister and fuel pump. Repair or replace as necessary.
? Check for open or short in FTPS harness. Repair as necessary.
If OK, test with a new FTPS and check for proper operation. If problem is corrected, replace FTPS and go to "Verification of Vehicle Repair" procedure.
PCSV to Canister Line Inspection
1. Check for leakage in hose.
(1) Disconnect the hose leading from the canister to the PCSV at canister.
(2) Using a vacuum pump, apply specified vacuum[Approx. 10cmHg(4 inHg)] to the manifold side of the valve and verify PCSV holds vacuum.
(3) Monitor vacuum pressure for 1 minute. After 1 minute, pressure should not drop more than 2cmHg(0.8 inHg).
(4) Is pressure within specification?
YES
? Go to "2. Check for leakage in canister" procedure.
NO
? Check for cracks or damage in hose connecting PCSV and canister. Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.

2. Check for leakage in canister.


Thoroughly check all fuel vapor hoses and hose clamps between:
1. Canister and fuel tank.
2. Canister and CCV.
3. Canister and PCSV.

If NG, replace hose or clamps as necessary and go to "Verification of Vehicle Repair" procedure.
If OK, go to next step as below.
(1) Disconnect hose clamps and remove canister assembly .
(2) Block the hose of between:
A. Canister and fuel filler neck.
B. Canister and CCV.
C. Canister and PCSV.

(3) Apply maximum of 10cmHg(4 inHg) pressure through fuel tank port from canister.
(4) With system sealed and pressurized, check for leaks.
(5) Were any leak(s) found?
YES
? Repair or replace leaking system component(s) and go to "Verification of Vehicle Repair" procedure.
NO
? Go to "Fuel Tank Line Inspection" procedure.

Fuel Tank Line Inspection
1. Relieve the fuel system pressure and remove the fuel tank.


Before removing the fuel tank, make sure the fuel hoses are not leaking.

2. Block all of the following outlets:
(1) Fuel lines.
(2) Fuel filler neck.

3. Apply maximum of 10cmHg(4 inHg) pressure to the EVAP. hose at the fuel tank. Then, pinch the EVAP. hose to retain the pressure.
4. Check the suspect area for leaks with a soap solution.
5. Were any leak(s) found?
YES
? Repair or replace leaking system component(s) and go to "Verification of Vehicle Repair" procedure.
NO
? Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Jun 30, 2011 | 2003 Hyundai Santa Fe

2 Answers

351 runs rough in drive - acts like a vacuum leak but cant find it. I put new plugs , wires , dist. cap and rotor , fuel filter. How can I fix this? I've had it to 3 mechanics and they give up but they're...


spray carb and choke cleaner around intake gasket area motor rpms will raise if leak is present, will also react on vacuum lines in the same way.

Jan 30, 2011 | 2004 Ford F150

1 Answer

Saturn 2002 sl seems a small gas leak on top of gas tank-is it usally the line? cant see where on top of tank.because its still in the car. thanks.


The fuel pumps on this particular model are known to crack. The plastic part of the pump usually cracks across the top which usually results in a leak. Only way to fix is to replace the fuel pump assembly. I have seen this happen several times on this exact model car. Hope this helps. If you need anymore information, let me know.

May 29, 2010 | 2002 Saturn L-Series

3 Answers

How to remove fuel pump on Neon 1998 ? can I reach from inside the vehicle ?


on a dodge neon the fuel pump is in the SIDE of the tank... NOT the top. to remove the pump follow these steps...
******* first unplug battery and remove ********
1. unbolt passenger side tank strap and lower side of tank.
2. a. if tank is plastic, CAREFULLY unscrew plastic retainer ring but do NOT remove.
b. if metal tank, unscrew metal retainer flange but do NOT remove
3. unplug electrical connector and fuel line from pump. move aside.
4. completely remove retainer BE CAREFUL not to disturb pump.
5. have drain pan or wide-shallow bucket available to collect gas. (if tank is full this will need to be able to hold 7-8 gallons)
6. gently twist and pull pump out till gas comes fourth. catch gas in pan/bucket.
7. remove pump when gas stops flowing.
8. install is reverse of removal.
9 BE CAREFUL not to wrinkle gasket or lose gasket into tank when installing or the tank will leak around pump.
10. tighten retainer but DO NOT OVER TIGHTEN.
11. reconnect plug and fuel lines check for leaks.
12. reattach tank strap and fasten
13. refill tank with clean gas. check for leaks.
14. put battery back in. connect battery, start your neon and check for leaks one last time.
15, have fun. this will take about 4hrs to do by yourself with proper tools.

Apr 24, 2010 | 1998 Dodge Neon

1 Answer

For code#po442


evap system leak small most of the time this code comes from forgetting or properly replace their gas cap--others are gas cap not sealing replace cap-or a small leak in the fuel vapor lines -check cap and reset code if comes back check seal arund cap repair or replace if damaged -if good inspect the fuel lines and hoses for small cracks or damage repair or replace if necessary

Jan 20, 2010 | 1999 Volvo S80

2 Answers

1989 civic dx runs great until tank gets to half way point. Replaced the pump and tank with new parts.


check lines in tank also check pump asm, for cracks in metal line that connect to pump, or sending unit could be shorting out, start there. good luck.

Oct 23, 2009 | 1989 Honda Civic

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