Call Tom ASAP

 

Why would that be?

 

I'd say he's making that suggestion based on "I think I reinstalled the stock tune".

Problem with loading/reloading tune would be his area of expertise.

Otherwise the guess would be wiring harness problems from the recent work.

 

So I restored the original back up, watched it go through all the monitor tests, only to see the dreaded p0420 code pop up. I have new O2 sensors front and back, motorcrap as well. Now what should I hit with a hammer. Kinda tired of this already.

 

Which HFC did you use? For example, one of CFM's HFC descriptions specifically states it will throw a p0420 code.

http://www.c-f-m.com/performancepar...arts/pc/CFM-Race-High-Flow-Cat-Pipe-for-02-04-SVT-Focus-82p128.htm#.VC8UvBbp8UM

 

U1027- Invalid missing engine rpm data
U1009-Standard communication protocol invalid missing engine torque data
[][][][][][]* Only thing that comes to mind for these 2 is the crank trigger sensor , its easy to remove and see if the end closest to the fly wheel is scratched up and being rubbed on by the fly whl

P1131-Lack of heated O2 sensor Bank 1
[][][][][][]* common code to get , if the o2 is working it isnt an issue unless you get it daily
P1246- Alt load input failed
[][][][][][]* Another common code for the SVT , could mean you Alt pigtail is bad or Alt isnt charging , use the datalogger to check your Alt voltage under load

Were you getting any of those with the tune in ?

Tom

 

Tom, the only code I'm getting now is the P0420 and the tune is not in. I was getting those with the tune in.
ShelbyGt, I am running a Dominant Engineering HFC. Let's hope that I don't get a P0420 just because of a HFC, that would really suck right now. Considering I am running all v-band clamps hardware and the stock cat is old school stuff. I just need to pass emissions. Running on expired tags because I can't pass right now.

BTW, elderfocus........lol, I need to have you send me a tune after I pass emissions. If I ever pass.

 

I am running a Dominant Engineering HFC. Let's hope that I don't get a P0420 just because of a HFC,

Good luck with that.
I am in the Dominic Biro is a charlatan and thief camp after my parts broke and he said to send them back to him for replacement. Once he got them, crickets.

 

My CEL came on with a Dominant Eng HFC. Had to use plug anti-foulers to clear it. It was fine for the first month or two then CEL came on, then off, then on and stayed on.

 

Tom, I have a diablosport predator.

 

What is a plug anti fouler?

 

Basically a spacer for a spark plug. Google it, you'll see plenty of images. You can use them on the rear o2 sensor to get the sensor out of the main flow of exhaust and hopefully get rid of the CEL. Worked on mine.

 

Thanks for the info. The issue is with the front O2 sensor. Bank 1.

 

Both O2 sensors on inline four cylinder engines are Bank 1.
The pre Cat sensor is Bank 1, Sensor 1.
The after cat sensor is Bank 1, Sensor 2

The P0420 code is due to the front O2 sensor switching as it should and the rear O2 (Bank 1, Sensor 2) closely following that switching. Normally the rear O2 is a nice flat wave form that doesn't look like the front O2 sensor waveform.

http://www.easterncatalytic.com/wp-content/uploads/2012/01/po420_fig06.jpg

 

P0420 was the most recent code mentioned, you can see description here:http://www.focusfanatics.com/forum/showthread.php?t=59286

A number of possible causes for the poor CAT efficiency code, powderfinger was referring to a fix for the CAT not cleaning up the exh. enough to make the PCM happy.

Your first post mentioned a code for 02 heater, bank one - thought that one was cleared up.

 

So I should be able to see this in the data stream with my code reader. I can see the readings on both sensors. I'll look in the am.

 

I also have a mil adapter that might get me through the emissions.

 

Seems as though their adapter did the trick. So what did I learn?
Issue: If you have a Dominic engineering hfc, stock tune, you will get a cel.
Fix: mil adapter
Now to get an updated tune from tom.

 

Lmao, well the mil adapter cleared the cel just long enough to pass emissions and get my Focus legal again. As I was heading back from the license office.....................bang, it popped back on. Same P0420 code. Bank one threshold blahblahblah................