Hey all, Im a really tight bind. Im trying to get my car smoged before I get in big trouble with the state of california. The check engine light is on and found out that it is an evap code Im throwing. Ive already replaced the gas cap. Where are the most common sites for a breakdown in the evap system. I have a 99 base prelude that is 100 percent stock. Any help that you can give me would be great. Thanks to you all. And happy holidays in advance.

 

What is the code? P1457 or P1456.

 

I believe it was p1457.

 

i was hinking it might be the evap canister and or solenoid. do the 5th gen preludes have as many issues with these as the accords do?

 

Well you could keep guessing like you didi with the gas cap. or take it to shop and have them run a smoke test. Cost between 60-80 bucks and will tell you whats leaking. Then replace the faulty component/hose.

 

The computer checks the evap system by running a test , I think it puts the system in a vacume and checks for increase in pressure.
Check this web site out it has the manuals for 5 gens get the fuel and emissions it should have the way of testing the system out.

http://hondatech.info/downloads/Auto...de/Prelude%205

 

A smoke test wont reveal an internal leak. Try this:
1. Turn the ignition switch to ON.
2. Clamp the hose between the two-way valve and fuel tank.
3. Disconnect the hose between the canister and the two-way valve at the two-way valve port.
4. Attach a hand vacuum pump to the port on the two-way valve.
5. Read the voltege at the FTP sensor, note the voltage reading.
6.Apply 2 inches of vacuum to the two-way valve and watch the FTP sensor voltage. If the voltage drops more than .05 volts in 20 seconds, replace the two-way valve and the bypass solenoid valve, retest.
This is a very common problem on this particular Prelude.

 

thank you all soooooooo much for your help. given the current economy im in a huge bind here and all your help is more valuable to me then you could ever know. And dcfiver if i had the cash to waste at a shop i would but i dont. thanks for the sarcastic tone in your response as well. the rubber o ring by the way on my cap was completley worn so it wasnt so much a guess as it was more like knocking off one of a few problems that need solving. the first on the list. to the rest of you, thank you so so much for you sincerity and kindness. you will never know how much your help means to me. thank you al and have a wonderfull holiday. i wil keep you posted as to whats going on.

 

Check your evap hose on the driver rear wheel well. Make sure its not disconnected . Thats where my p1456 code came from .

 

Funny I came here to find the issue I have the same code P1456

 

If I continue to drive with the code I won't go in limp mode or unable to hit vtec? In future going to convert to obd1 chipped ecu. So in meantime can I drive with that code?