Civic-EG.com Forum 3.3.1

- Fri May 30, 2008 12:56 pm #57073 Ok so first off I dont really know anything about motors... Im learning as I go with my hatch. My motor is a stock CX motor.

I went to get tested on tuesday and failed my NOX and CO well i come home change spark plugs and wires, air filter and change my coolant fluid and run my car on premium for a test yesterday, well I passed the NOX but my CO went up from 12.20, to 12.46 (its supposed to be below 12.00)

So I called a few friends and one told me to check my PCV valve and if it rattles then it need replaced. and also to change my fuel filter.

Im trying to do the cheaper things before i just break down and get a new cat. Help me out homies

Now to the questions

1. Is it easy to change the pcv valve?

2. Is there anything else I should check/change?

please help i have only a few more days lol

[suspendedHatch]

- Fri May 30, 2008 2:55 pm #57089 The PCV is a small plastic L shaped tube on the intake manifold runners.

You have to post up all your readings for someone to help you. O2 is obviously not a regulated gas but it tells us whether you're burning all the fuel.

Use Seafoam or a similar product in the oil, gas, and through a vacuum line. Then drive it a few miles and change the oil, oil filter, and spark plugs.

Before any smog check you should check the base ignition timing, change the oil, cap, rotor, air filter, and spark plugs. Check the gap on the spark plugs. Plug wires should not be changed until you verify that they're bad. PCV should be cleaned or replaced. I always take off the intake tube and clean out the throttle body with some carb cleaner and a rag. If you've never done so, it's a good idea to remove the intake manifold and clean it out as well, preferably in a parts cleaner at a shop. This requires new gaskets for the IM and TB, and you'll have to clean off the surface of the head.

O2 sensor should be checked with a multimeter to see if it is "lazy". Cat should only be replaced as a last resort. They're not supposed to go bad unless you're burning too much fuel; or you're burning coolant or oil.

You should never complain about smog because it forces you to bring the maintenance up to date and results in better power and fuel economy.

There are 10,000 threads on the internet about passing smog.

- Fri May 30, 2008 3:15 pm #57092 Thanks for all the info

*hydrocarbons passed at 0.60 (applicable is 0.80)
*carbon failed at 12.46 (applicable is 12.00)
*NOX passed at 1.90 (applicable is 2.00)
Is that what you need?

Before my last test I changed my oil, oil filter, air filter, spark plug and wires and sized gaps on new plugs. I definetly dont mind emissions, and i do know that there are plenty site to help pass a smog but not to many are honda specific, and mosts info you find is how to cheat, that is why i posted here.

I'll take the intake manifold off and clean it because I highly doubt it ever been done from previous owners, the last owner was a dingbat!

So the pcv valve is under my fuel rail?

[teal_dx]

- Fri May 30, 2008 3:21 pm #57093 look at your intake manifold, there's a top on the top that comes out and goes down under the intake manifold and has a plastic thing in it.

A haynes/chiltons manual will be a good investment if you're learning to work on honda motors.
Mine is all greasy I've used it so much lol

Do Not PM me your technical questions. Post them in the forum!
My 1992 SOHC Turbo Hatch
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- Fri May 30, 2008 3:27 pm #57094

look at your intake manifold, there's a tube on the top that comes out and goes down under the intake manifold and has a plastic thing in it.

A haynes/chiltons manual will be a good investment if you're learning to work on honda motors.
Mine is all greasy I've used it so much lol

I edited your post, im pretty sure i know what your talking about!

and definetly going to pick me up that manual!