I have a stock 1998 Honda Prelude with 71,000 miles. It is all stock and it failed the emissions test due to "No" being a bit high. It barely failed with just 2 pts. I know the timing on the H22 Is preset and can not be reatarded. I was wondering if there are any tricks in getting the car to lower to No. I am currently running 91 octane. What can I do to get the car to pass without changing the cat. I did heat the car up before I did the test, and it has new plugs.

 

seafoam that bitch.

 

new cat will do the trick.
catalytic converters convert CO and NO to CO2 and N by splitting the Oxygen atom from the Nitrogen and bonding it with the Carbon monoxide.
How far was it from passing? If it wasnt far then try running 87 octane, just fill your tank with a few gallons right before going. The 87 will burn off completely and may let u squeak by (this works well when hydro carbons are too high, because Hydro carbons are unburn fuel.)

 

It was only off about 2. I will try the 87 octane, but will that help with the No? Any other tips to get the car to pass?

 

Try doing a full tune up, fuel filter, spark plugs,wires etc...

 

Clean your egr valve and ports. The egr system reduces your NOx emissions.

 

You're car can easily pass. Has it had a tune up? That alone will make it pass. Good luck!

 

Water injection. It will work guaranteed. Raise teh rpm to about 3500rpm then with the air tube or intake off squirt water into the intake while it's running obviosly it needs to be a fine mist from a squirt bottle NO BIG DROPS. You will need to put about a gallon of water through iot. It helps to stuff a bent up peice of paper of cardboard by the throttle return stop so you don't have to hold the throttle. And if you wanna be a real G like me you will get an old washer fluid pump and resivoiur extend the wire to the pump with a cigarette lighter adapter on it to plug into the cigarette lighter then run a long hose hooked to the spray bottle handle. And you can then plug it in and not have to pump the bottle handle and you can adjust the mist with the little twisty valve on the sprayer. remember a fine mist.

I have seen cars drop over a 1000 ppm of NoX emmisions doing this and absolutely nothing else. I guaruntee you will feel the difference in the way the motor runs as soon as you drive it after doing this as well. More power and better response. Also a key thing to remember is after you finish squirting the water let the engine run at the 3500rpm for a bit to make sure all the water has been burned off. This is not a good thing to do if you have cooling system problems as the car will be stationary for quite a while doing this so your radiator fan better work or you will have an overheated junker in about 5 minutes. I do this as well as a valve adjustment to every customers car when doing a tune up. Also if the motor speed isn't reducing while your spraying the water then your not spraying fast enough. Don't let it go under 2000 rpm if it gets that low let it burn off the water raise speed then start injecting again. There will be a kinda quiet missfiring noise sometimes when you do this as well just so you know.

 

That type of grass-roots, shade-tree water injection is good to clean out the combustion chambers. It actually steam cleans the inside of the combustion chambers. Now, for a reality check, this thread is an emission thread, and to be more specific, a California failed emission thread. No smog tech is going to let the owner of the vehicle squirt water into the intake while the vehicle is on the rollers, let alone get anywhere near the car.

The windshield wiper pump is a really good idea, and there is actually a company, Snow Performance, that sells plug-and-play kits. These kits are made for water-methanol injection on boosted motors.

http://www.snowperformance.net...to020