I dont get it.

I failed WORSE.
7.78 out of 2.00 allowed Hydro Carbons.

This was with me running a direct hose to the cat from the air pump- running 87- drove it hard to the testing station to warm up the cat- and leaned it out as best I could.

Last time, and the time before that- I got 5.0. Hoooow did this go up soo much!

Im almost positive the cats are all clogged. Will be replacing those tonight and trying again tommorow .

Would a bad ACV do this? What about clogged egr or????

 

Also- I got 11mpg!!!

I really have no idea what to do about this car. Its pissing me off.

I got 13 the last time I tested.

 

looks like it's time to file for racecar exemption. ^_^

 

Wow...11 MPG??? I get 24 on my N/A. I'm assuming yours is N/A also? My guess is that your cats are completely plugged.

-Joe

 

I bet that when you replace the cats your HC reading goes to 0.

 

Doing that tonight.....
Straight pipe into a main cat.
"Crosses fingers"

 

Yep HC's are normally taken care of by the cat, so if your getting high numbers its probbably a burned out one.. It should definately bring down the numbers...

Don't give up on it, once you get it done then the real fun begins.

 

Have you tried starting with a FULL tuneup?

 

Full tune up was done 1500 miles ago, when I bought the car.


Its funny. Im fixing it to sell it.

 

Also, be sure to place the car around where the stock one was or close to the motor...you want the gases to be HOT so the catalyst works correctly. I've seen way too many people with custom made exhausts put the cats too far back.

 

If your mileage is that poor, then there's something wrong...TPS correct? Intake temp sensor? Water temp sensor (at the water pump)? Initial set coupler jumped? O2? Injectors professionally cleaned?

However, if your cats truly are clogged, then that would explain everything.

 

3 exhaust shops say my cats are clogged worse then others they have seen .

Im replacing the pre cats with just a pipe- into the cat- into the stock Y.

 

HOLY CRAP were my cats clogged.
The first pre cat un did- cloged the second one- that broke off and hit the main and clogged it.

New (used) cat and gutted pre cats- going to try and pass tommorow.

Should I do the air pump trick again or what?

 

Sure...Why chance it?

 

Passed with 1.25 of 2.0 allowed .
Gas milage increased. No more crappy idle. No more hesitation at 3800rpm. More power in 3-4- It sounds GREAT .

 

Amazing what a free flowing exhaust will do, isnt it?

 

youre saying a single cat setup worked? im worried.. acutally i get about 18-20mpg on my car so i shouldnt be too paranoid, except that ive got a wussy lil cat for a pre cat and the exact same one for the main cat. this things not more than 10 inches long. the muffler dude said its a good one, and i trust him alot, he did wonderful things for my honda.