Does computer need reset after install of HFC?

[CYO44Baseball32]

Was wondering if anyone knew because I'm about to install mine today

[G_whizz]

Kewl... you should not have to reset the carputer..

[CYO44Baseball32]

Kewl... you should not have to reset the carputer..

Oh I thought you did b/c I read that test pipes needed the computer reset so I figured the HFC would too

[G_whizz]

Whoops ok... I thought you were referring to exhaust not Hi flo Cats.. let me double check...hang tight!

[joe603]

It won't hurt...do the simple ECU reset by unplugging the negative battery terminal and depressing the brake pedal. This drains out any capacitance in the system. Then simply reattach the negative terminal. Poof....your ECU should now be reset. Use this method to clear up any CEL lights too. If they come back, then you've got a problem.

[EZcheese15]

Shouldn't need to reset the ECU.

But if you want to reset the ECU, and don't want to unplug the battery, here is the alternate way to reset it:

Turn the key on, wait 3 seconds.Press the gas pedal to the floor 5 times within 3 seconds and let off.Wait 7 secondsPress and hold the gas to the floor for 10 seconds.

At this point the check engine light should start to flash. It flashes the codes (if any are tripped). Long pulse is the 1st digit, short pulses are the 3 consecutive digits. A code of 0000 is clear (0 is a 10 pulse flash).

To reset the codes, hold the gas to the floor for another 10 seconds until the light flashes a 0000. Let off the gas, turn the key off, and restart.

[EZcheese15]

Oh I thought you did b/c I read that test pipes needed the computer reset so I figured the HFC would too

Test pipes are eliminating the cat. Having no cat will cause a check engine light because the 2nd O2 sensor is checking for an alternating voltage signal between -.1 and .1 V. If the cat is gone, the signal sweeps from -1 to 1 V (the same as the upper O2 sensor), and causes a check engine light.

A high flow cat works the same way a regular cat does, it just flows better. It still cleans the exhaust and will have nearly the same voltage reading on the O2 sensor, so it should not cause a light.

[WDRacing]

You can get a resistor to get around the CEL light though...if you wanna run catless that bad.

[CYO44Baseball32]

Damn talk about a tough install, had to stop b/c I need a breaker bar and swivel socket. Need to come through top of engine bay in order to get some bolts loose. Will try again next Monday when I have time. If anyone has done this tips please

[WDRacing]

Spray everything with WD40 the day prior.

[EZcheese15]

Spray everything with WD40 the day prior.

PB Blaster, not WD 40. PB Blaster practically loosens up bolts without having to use a wrench.

[WDRacing]

PB Blaster, not WD 40. PB Blaster practically loosens up bolts without having to use a wrench.

I like the WD

[EZcheese15]

I like the WD

WD is gay, and so is the lubricant

[WDRacing]

WD is gay, and so is the lubricant

[CYO44Baseball32]

Finally got on and they sound nasty. My buddy at the Infiniti dealer did them for me because I couldn't turn the bolts. I made it harder that my car is so low and I only had it up on jacks.

[EZcheese15]

Nasty good or nasty bad?

[CYO44Baseball32]

def nasty good! Fast intentions is the way to go

[CYO44Baseball32]

I tried the reset way where you dont unplug the battery mentioned above and it didn't do anything. Then I tried the remove the ground and depress the brake and the "service engine soon" light disappeared. Then 20 mins into driving the "service engine soon" light came back on. Anyone know of any way to reset it another way or something else to do to get it to stop lighting up?

[EZcheese15]

I tried the reset way where you dont unplug the battery mentioned above and it didn't do anything. Then I tried the remove the ground and depress the brake and the "service engine soon" light disappeared. Then 20 mins into driving the "service engine soon" light came back on. Anyone know of any way to reset it another way or something else to do to get it to stop lighting up?

Use a watch or something with a second hand when doing it the way I mentioned. If you don't do it exact it doesn't work. It took me about 10 times to get it right the very first time I did it.