So I finally got a set of Berk HFC for the HR motor and although I am happy with the sound paired with the nismo exhaust, a problem with quite possibly my o2 sensor will not allow me to fully enjoy my new setup

I had my HFC's installed at Rush Auto, and took quite a while because we could not take off one last bolt on the original cat. After installation, the problems came.

Keep in mind I have an Automatic Transmission. I say this because Mike from revomoto said there could be a possibilty that the CEL is on because the HFCs came off a manual transmission.

First off, to my knowledge, HFCs are not suppose to have a check engine light. I immediately got it when I turned my engine on. I was told that I need to get a set of nonfoulers, but again, I did not think HFCs needed nonfoulers.

Second, while I was driving off at 1/4 throttle, the engine began to sputter at around 2500-2700 rpm until it shifted into the next gear. As i got on the free way, it sputtered at the same rpms until it shifted. By the time I was going about 65 mph, when I proceeded to gas it some more, the car began to jolt forward and back as if i had hit my rev limiter or was experiencing some MAF issues.

Is this a result of a damaged o2 sensor?

Michael, the guinea pig for Berk's HFC, stated that he had experienced the SAME exact issues as me. Brian from Berk had told him that he did in fact damage his o2 sensors in the process of installation, and offered to replace his o2 sensors. Michael however replaced them at the dealership. After Michael replaced his o2 sensors, no more engine light, and no more sputtering.

Bottom line, is this a result of a damaged o2 sensor? Or is it a problem with the sensitive 07 ECUs and automatic transmission like Mike from Revomoto stated?

 

I was told that only the o2 sensors on the headers would cause the car to sputter. The o2s on the cats aren't suppose to make the car sputter like how mine is right now. Can somebody chime in? I'll be resetting the ECU tonight to see if anything happens. Help me out

 

The ecu on the HR is a bit tricky. Normally for HFC's you don't need non foulers but with the HR I think you probably might.

The jolting has happened to me once and it scared the **** out of me. After I turned off the car, it never showed its ugly face again.

I have TP's with non foulers but I have had my check engine light on for the o2 sensors basically since i got my car. That's how long i've had TP's for. I've gotten used to it. The only problem I have is a bit of a lag when I mash on the gas. It hesitates for a second, then it starts to move.

What I would do in your situation is put non foulers on and reset your ecu. Hopefully the ecu will recognize more exhaust flow but also recognize there's a cat. That's my suggestion though, I would also contact berk technologies for more information.

 

quick clarification, Brian offered to replace the 02 but to help him out i got it done at the dealership.

as far as it being different from auto's to manuels, that doesnt sound right...

 

The o2's on auto's and manuals are the exact same.

 

Here are the codes.

P1168
Manufactuer control fuel air metering

P0051
O2 sesnor Bank 2 Sensor 1, Heater circuit low.

To my knowledge, P0051 would mean I need to replace my o2 sensor because the circuit that powers the heat for the o2 sensor is damaged.

Does anybody know anything of this?

 

Edited.

 

Hmmm...this all sounds kinda frustrating.
I have a set of Crawford HFC's sitting in my garage right now; was planning to have them installed next week.
Hope these issues are easily resolved.

 

Anyone?

 

It might be your primary o2 sensor on bank 2 that's causing problems.

 

Primary o2 sensor as in the one on the headers?

 

Im about to buy a set of test pipes but educate a newbie on this... what are non foulers? Are they the same as 02 simulators or something different?

 

Wow, all I'm hearing is terrible things about any of you guys that replace the cats with test pipes or high flow cats. All for a shitty exhaust note, polluting the enviornment, and check engine lights....oh and stuttering. Swell choice. If you want performance, do what I'm planning, 16lb wheels each, 4.08 gears with a Cusco, and a full catback. There's no need to touch the stock intakes, they are just fine, and I'm not touching the cats on a brand new $30K car.

 

Really? Stock cats restrict exhaust flow. You don't believe me? Come by and drive my car vs a stock HR with cats. The difference is night and day. There is some tq lost down low and yes check engine light stays on but who cares, top end pulls like a mad horse. The catback doesnt really do as much as removing the stock cats.

 

That's what i'm guessing but it sorta doesn't make sense. I still say you put non foulers and reset your ecu. You might just have the same problem I had once. The jolting and hesitation only happened once and never happened again.

 

Your point in replying to my thread was...? I can say 4.08 gears will eat up more gasoline therefore you are wasting more money on gas. Swell choice We're all here because we are car enthusiast. If it's my choice to install HFC, than let it be. Nobodys getting on your as$ about modifying your car or anything so take your opinion elsewhere.

 

Relax, it is a public msg board, I was just stating an opinion, like you just did. With that said, I do hope your car gets back to running well.

 

was digging through my PM's and this is one of the ones Brian sent me.


"We were seeing P0031 & P1148. Both related to the bank 1 (passenger side O2) we had problems with."

i de believe that when i went to WCN Heri also mentioned that i was throwing the heater one as well.

 

Sup michael, yea those are the two exact codes that I am throwing. I'm almost 100% convinced it's the o2 sensors because what is the liklihood of the same exact codes and behavior not being the same problem? I'm going to performance tomorrow morning at 6 to get this issue resolved. By the way, how long did it take for them to fix the o2 sensors?

 

goodluck, hopefully they can take care of you. I'm a bit disapointed with WCN's new service manager Reuben. He seems to really lock down his service writers because i know before he came, Heri would help me out with stuff no questions asked.