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EVAP - Fuel Evaporative Controls Functional

Got a problem with your stock CRX? This is where you should start.

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EVAP - Fuel Evaporative Controls Functional

Postby CRX Driver » Fri Apr 16, 2010 5:28 pm

i went to smog and it fail the Fuel Evaporative Controls Functional. what can i do to fix this problem? replace the canister?

The fuel evaporative systems probably won't fail furing the service life of the vehicle; however, if it does, the hoses or charcoal canister are usually to blame.

Always check the hoses at first. A disconnected, damaged or missing hose is the most likely cause of malfunctioning evaporative systems. Repair any damaged hoses or replace any missing hoses as necessary.

Checking for faulty canister:
Detach the canister from the firewall.
Detach the intake tube hose and put your fingers on the end of the canister inlet fitting.
Warm the engine to normal operating temperature, then increase the engine speed to 2500 rpm. If the canister is functioning correctly, air will be drawn into the canister through the inlet tube and you will feel suction. If you don't feel suction, replace the canister.

this is for those who have fail the EVAP during the functional smog test. STICKYYYY :-)b
Last edited by CRX Driver on Mon Apr 19, 2010 12:28 pm, edited 1 time in total.
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Re: Code 90 Fail!

Postby mossin_90 » Sun Apr 18, 2010 7:26 am

make sure that the solenoid that control it, is good and that all the vacuum lines are good too or get new hoses.
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Re: EVAP - Fuel Evaporative Controls Functional

Postby msc » Tue Apr 20, 2010 10:36 am

Looks like you found some info but you didn't say if you have resolved the problem. Are you still seeking a resolution?

The info you posted looks like generic info rather then specific to the system in the CRX. There are more detailed troubleshooting instructions in the factory service manual.

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Re: EVAP - Fuel Evaporative Controls Functional

Postby 2point2 » Tue Apr 20, 2010 6:33 pm

:shock: wow, they check everything in cali!

I had 'fake' hoses to my canister. :lol:
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Re: EVAP - Fuel Evaporative Controls Functional

Postby thesmogman » Fri Apr 23, 2010 4:15 pm

You failed the LPFET test which tests to make sure the gas tank is sealing properly.

This test has nothing to do with the charcoal cannister.

We pinch off the vapor line from the gas tank at the cannister and put an adapter in the filler neck and pump a 1/2 lb of pressure into the tank. The test machine checks for small leaks.

This being said it is either the tank, the filler neck, or the vapor line from the tank to the cannister.
Included in "tank" is the seal for the fuel pump/ sending unit.

Hope this helps!!
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Re: EVAP - Fuel Evaporative Controls Functional

Postby drege » Sat Oct 20, 2012 4:15 am

2point2 wrote::shock: wow, they check everything in cali!

I had 'fake' hoses to my canister. :lol:


Yay reviving 2 year old threads :lol:
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