Well, it has been one year since I rebuilt my engine, rather, had a shop rebuild the engine. It was a bitch to get it to pass the emissions last year until they took off the Bonez Superflo cats and put on a stock cat setup.



Now a year has gone by, time for inspection again and it won't pass. We have been over this car with a fine tooth comb and can find absolutely nothing wrong. O2 sensor works fine. No vacuum leaks, I put the stock TB on it and took the modded one off. Everything hooked together fine. AFM works fine. Air pump functions normally. ACV works fine. EGR valve functions normally. All solenoids function fine. Can't find anything wrong at all except it will not pass.



What was the alcohol deal that someone tried and was able to pass?



Anybody have any ideas at all that could help? Please........?????



Thanks for any ideas at all.



It is an 87 GXL with the stuff done to it that you see below in my sig.



Greg

 

I did the alcohol deal. I wouldn't really recommend it on a car you like!



I bet it will pass if you run your air pump output right into the exhaust rather than having the ACV disperse it at neccessary..



I can't think of a quick way to hook it up that way though.. Maybe through the split air pipe?



How badly are you failing?

 

I am waiting on the phone call from the folks that rebuilt the engine. they were going to work on it then try to get it to pass. It was failing pretty bad though and we cannot figure out why. They were going to put a set of stock cats on it but he sold his only set so he is going to try something else.



I have always been told that the Bonez superflo cats will pass emissions but mine is not so I don't know what.



It only needs one more year of passing because then it is going to be torn down again and built for racing only. I only want one more year out of it, damn!!!!!!!

 

yah i think you need a good stock cat?

 

Post the test numbers. By reading them I can usually tell what's causing the failure.



Most high performance cats meet the letter of the law, but they aren't good for passing smog year after year. The washcoat used in a hi-po cat is usually as little as possible while still allowing the car to pass smog - while the cat is new. 12 months later? It may be toast. That's why the factory cat weighs three times as much as most aftermarket cats, they have to last longer and therefore contain more surface area to hold the washcoat. This article will explain why cats actually wear out.



I'm in the same boat as you. My 500+ CFM aftermarket cat passed smog with flying colors in year one. Now? It passes a visual, but will blow very high HC numbers.

 

my high flow cat passed 2 years now, I will see if it passes

a 3rd, its a Catco

 

i have a catco as well, i'm hoping it will last a couple of years

 

I will get some numbers as soon as I talk to the shop today.



The guy working on it thinks I may have an injector problem with one of the fuel injectors also so he was getting that tested to see.

 

Catco’s are good cats. They have good flow numbers and seem to last a long time if not overheated. If a car runs rich, a Catco will overheat and break up internally. You can usually tell if it's broken up by the rattling noise.

 

Well, the car passed inspection.



It was the damn Bonez Superflo cats. They aren't emissions legal from the get go. It did not pass with them last year or this year. They were brand new last year.



The shop rigged up a catalytic convertor system and put it on the car and it was enough to pass. And when I mean rigged, I mean rigged. They stayed at work welding together pieces to put on the car. Good people at this place.



In fact I am going to send out a little love to the folks at The Rotary Shop, here in Fort Worth. If you need some good work done they are the ones to do it here.



Nothing fancy...no modding, no tricking, just good work to keep the car on the road.



Greg