Failed Smog-Help!!!

Get it really hot and try again.

 

+ Zillion

Don't drive it at high RPM's only. Acceleration is the key to pumping in the extra needed gas to elevate cat temperatures. Smog techs are taught to only test warmed up cars but casual driving and idling won't warm up a Ferrari in the way that we mean.

 

I don't know where the heck you went but my car does the exact same thing and it passed with 50ppm HC and this is the max allowable. I figure that your car is in excess of that. You do not need 49. I am more curious why your car is so high in unburned HC. If it is stock with no chip mod, it might be a leaking injector, which would hasten the death of a cat. Mine has ND chips so that explains the richer mixture. Stock, my car was in the low 40's.

 

The difference between low 40's and 50 is not even the margin of error or calibration of the machine. To expect consistancy in the range of 10ppm in one machine much less from 2 different machines in different places, on different days, with different weather, different air temps, different air densities and different brands, blends or types of fuel is very unrealistic.

 

Oil change will help by a fart but you should be looking at plugs, O2 sensors/lambda values, cats, compression/leakage now. You might request that the tech (sniff) each bank separately.

 

how old are your cats?

 

Also I was blown away how many techs were unaware of the sample hose filter.

 

Should be ok! Replace O2 sensors and try again or go for full diagnosis.

 

I have a 348 and got mine from G T car parts in Phoenix,az. 623-780-2200,they will ship to you, great guys and good prices or some have gotten them at autozone,rock auto, they are Bosch o2 sensers but I'm not home to see what the part number is but the ones from the part stores I believe you need to splice in the wires but the one from GT just plug in like the orig. on my 348 they just unscrew from the exhaust by the cats and the wire unplugs from under the air cleaner box.

 

Mike,

Go see this guy. Joe san P is an excellent mechanic with general and race knowledge. He is a very valuable resource. He can make your car pass. I've known him for 20+ years. When I have questions he is often the first guy I call.


Concours Auto Repair
(Concours Ferrari Auto Repair*)
541 W Lambert Rd
LA Habra, CA 90631-6753
Phone: (562) 697-4188

 

If you can solder there is a thread on generic O2 sensors(65$ea). Replaced mine (front ones only) and it made a huge difference. My experience showed my 355 passed at 25mph but not 15 because of the O2 sensors. Then it failed again at 15mph becausde of what the boys are saying about not hot enough. The tech in palm springs high idled it before the 15mph test and it passed easily. Readings before high idle were 60 after were 15. I thought in the future I may just wrap cats with exhaust tape for the test. Oh ya my cats were the new hyperflows and I think they probably cool off quicker than stock. just my 2cnts
grant

 

I thought you were not supposed to solder o2 sensors? Or is that a myth?