breakb

iTrader: (2)

u had to reset ur ecu? or u just let it get used to it over awhile?

Peace out

kyoso23

I just let it figure it out. I probably should have just reset it to begin with though, probably would have been better. It's good to go now though.

JesLet

iTrader: (19)

Oh wow I didn't know you had small problems with it.. Glad you fixed it!

I guess your OBDII is adjusting to those bada$$ Magnaflow system

kyoso23

Car wasn't used to breathing, eh.

2.5tsoarer

iTrader: (3)

I had similar issues when I did anything to my 1jz when I first got it. I wouldn't see the results till a couple of starts later.

kyoso23

So yeah, the hesitation is back and it worse than ever. Still no check engine light, but it feels like it's "missing". From a dead stop it sputters like a beeotch and in low RPM situations it will sputter too. Does this sound like perhaps a lack of backpressure? It ran OK for a couple weeks and now it's nonstop after today. I'm going to clean my sensors and check my plugs and rotors although they've got like 10k on them. Maybe a fuel filter? It started acting up the first time I drove it after I put the exhaust on though, just a coincidence? Anyone with a true dual setup, I would love to hear if you've experienced any issues.

ScottURnot

iTrader: (33)

????????
My 97 SC400 did 230 RWHP
NA
BFI
Headers W/full exhaust
PI TC
LSD rear

That was all it had at the time.

ScottURnot

iTrader: (33)

I am thinking you really should have a cat between the two 02 sensors on OBDII system. Mine worked perfectly when I was NA, It really sounds like that is the only difference between our setups.

kyoso23

I was told the rears only really monitor that the fronts are operating. My stock exhaust section that I pulled off only had 1 cat and it was after the O2 sensors, so that shouldn't really affect it. Did your stock setup look like this?


I'm reading more and more and it sounds like I might have a faulty coil somewhere, and it coincidentally shat the bed on the same start as when I installed the exhaust. I happen to have a "donor" SC4 in my backyard so I will see if a coil is to blame.

ScottURnot

iTrader: (33)

Yep, thats how my exhaust looked. Honestly, I was just guessing, you may be right.

kyoso23

So, I swapped out coils. No dice, started removing wires etc... and when I got to the driver's side dist cap, it was litterally broken. WTF? Pretty wierd for that to happen, let alone having it fail on the exact same start as when I added the exhaust. What puzzles me is why didn't I get a CEL when it was missfiring? Anyways, all good now. Thanks for caring guys.

kyoso23

One of the coil wires was all chaunched out to. Runs like a champ now. Sounds great. Need to wait a few days again for the ECU to settle. I gave it a full reset after that sheeat.