D.T.P

hey guys, got another problem. its been a while lol.
got a stock d16z6 which bogs quite hard after sitting for 4+ hours or so. it sputters as i accelerate, and the more gas i press the more it does it...until the car worms up and i drive it for a bit. i changed the plugs/wires/cap/rotar/fuel filter. also this morning as i was coming home from work, the ramp to 400N from 401E was empty so i pushed it a little and i felt it chock a little. before/after the ramp it was fine. so it seems like it happens on turns. Fuel Pump? i thought mine died last week but after the car sat for a bit it started up and was fine. this bogging has been going on for a very long time, but it got progresivly worst. and now im getting very annoyed of it.
also i have a chip, but im not sure wth is on it...and previous owner said its not ebay chip [which i doubt]
so any help would be greatly appreciated.
also if ^^ does not make sense ill rephrase it once i get some sleep lol.

copasetic

O2 sensor.. Sounds like it to me.. if im wrong you wont hate me because a new o2 sensor will quickly save you the money in gas that you spent on the sensor..

Clean95d16

try a stock p28 as well if u can get ur hands on one, unless the chips elsewhere, but it does sound like an O2 as well...

k_r_a_c_k_e_r

iTrader: (3)

PM Chris_V2 or Zeeman.. My car was doing the same and they figured it out for me!

Clean95d16

Zee would know whats up.

D.T.P

Did they tell you what was wrong? I'm so tight with schedule for work and other things, I do not have time to bring it to people. Unless I really can't figure it out.
Well I was thinking o2 and I'm about to buy an ngk one maybe today or tomorrow, but the thing this morning on the ramp tripped me out. Since it was fine before the turning ramp and as I was stepping on the gas around a ramp it sputtered a little.
Also the reason I mentioned the chip, Is because as far as I know if you go 70%+ on throttle, it goes in open loop and does not take the o2 reading. I'm not 100% sure on this one.
Well anyways, I'm gonna try to get my hands on that o2 today, and hope for the best.
Any other tips would be appreciated.

k_r_a_c_k_e_r

iTrader: (3)

Not to sure all the things they did, they'll chime in soon..

T-MacK

Sounds like your O2. If it is try and get a used one from the wreckers and if you don't no what "chip" is in your ecu, I would find out what was going on with it. Those B:S e-gay chips have a tedency to make your car run really lean and do more damage then good.

D.T.P

well thx for advice, i got my brother to go buy me an o2 since i dont even have time for that. hopefully that fixes the problem.
also with a chip, does it flash the ecu or can i pull it out and it will run of stock software?

Clean95d16

depends on how they did it, alot of guys flash apparently...., but if its an egay, its probably some rig lol., got any friends with a stock ecu just try it out for a few... cant hurt.

Clean95d16

PS : if u need another chip or any ecu problem, msg up jdm_187


Quote:
Originally Posted by Clean95d16
what chip can u do
what ever chip u want d16a d16q d18z6k1,b20 turbo, anything u want

chris_v2

Could be numerous things. Most likely it's a sensor out-of-range.

And for all those people saying it's an o2 sensor, it's not. When a vehicle is cold it's in open loop, meaning no oxygen sensor parameter is being read by the PCM. If it only bogged when it was warm, then I would ask you to check out your o2's, however this is not the case.

The cause could be anything from a bad ECU/chip, poor ground, ECT sensor, etc. If you want, swing it by the shop I'll look at it.

D.T.P

Yeah that's what I thought. And doesn't it go to open loop when more than 70% throttle down? Well ill check the grounds tomorrow, if no luck, ill pm you and I could probably come by on Tuesday. But ill let you know via pm.

chris_v2

Yeah, check the grounds, particularly the ECU ground on the thermostat. And it's 80% I believe.

Doesn't hurt to do a quick check for any DTC's as well.

D.T.P

checked the grounds, they were all in OK condition. took most of em off, sanded the connectors and sprayed them with "dry'n go". removed the back up/ecu fuses and removed the negative terminal of the battery. changed the o2 sensor [since i just got 1 anyways] and still the same. i pulled the main relay apart and the circuit board seemed sticky as if somebody spilled coffee on it lol.
any other suggestions?

jdm ek4

I had the same problem recently but i couldnt figure it out and my valve went on me. I had replaced the O2 sensor and cat (cause of emissions) and than i replaced the cap and rotor, plugs wires but the problem was still there. I did have a problem with the dizzy where inside of the cap was covered in red dust from a bearing seizing but i never had a chance to get to that problem.

Could be your dizzy maybe or timing is off?

D.T.P

ive been contemplating to change the dizzy for a while now. since when i changed the rotar, it wasnt secured on the shaft with a screw but was just stuck..and i broke some plastic cover around it.
btw would y8 dizzy fit on z6? just wanna double check.

chris_v2

Martin, you can keep on throwing parts at it, or get a proper diagnosis.

It's most likely a sensor that's acting up. If you can get it to act up during idle, I'm 99% sure I'd be able to figure out what the problem is. The only issue with diagnosing these problems, is sometimes it doesn't act up when you try and diagnose it.

D.T.P

lol thats the thing. after ill drive it down to a shop, it wont be there. unless i leave the car over night...which i cannot do because i need it daily. hopefully i can make time on friday..ill try to swing by the shop chris. srr empty promisses but i work a lot and have just few days off and always too many things to do.

chris_v2

Yeah, if it only happens when it's cold, it's going to be tough to diagnose. Have u tried scaning it?