so i really need some help to figure out whats wrong.

heres the story, yesterday i took out my pop charger and cleaned it by spraying it down with 409, scrubbing it with a tooth brush, rinsing it out with a hose from the inside out, let it dry over night, oiled it conservatively (jwt oil) this morning and installed it. i had the battery disconnected over night and reconnected it this morning.

i start the car up and the rmp's dropped a little then went back up (cold start), it warmed up and everything was fine.

i blipped the throttle and noticed that the A/F ratios would drop down after i let off the throttle then slowly climb back up to 14.x.

i start driving and notice that in between shifts, the A/F ratios will drop to 10.x. going into neutral also makes them drop.

the AFR's are normal in gear, driving, and at full throttle, up to about 5k rpm's where they start to drop down to 10.x

and just now with a warm start up, the car dies. it seems like it wants to stay alive but doesnt.

heres the video of the start up:

http://www.youtube.com/watch?v=r7h1e0mxEHs

and im listing my mods below (was my signature):

mods: bassani cat-back | berk test pipes | act 6 puck clutch | jwt light weight flywheel | jwt pop charger | md iso thermal 5/16 plenum spacer | osiris | hotchkis swaybars | hotchkis lowering springs | greddy strut tower bar | toyo T1R tires F: 245/40 R: 295/35 | varrstoen wheels F: 18x9.5 +12 R: 18x10.5 +15 | muteki sr35 red lug nuts | innovate motorsports db wideband gauge kit and SSI-4 | dodge avenger antenna | 5% window tints | alpine sub | rockford amp | nismo v1 spoiler replica | cf air duct | grounding kit | blox 490 shift ****

anybody have any idea whats going on?

 

I would try another battery disconnect reset. I would also check the MAF Sensor to make sure that it is fully connected and not damaged or backwards. If that doesn't work let me know.

 

I agree with above, clean your MAF sensors and make sure there seated correctly.

 

Hard reset after you check the MAF...

 

just did that. disconnected the battery, maf sensor, its clean, connected properly but still doing the same thing.

when i start it, if i keep the clutch pushed in, it wont die but if i let it out right after it starts, the rpm's drop and the car dies.

 

heres one more video of the AFR's

http://www.youtube.com/watch?v=19fXU-I3oCc

the rattling you can hear is just the clutch and flywheel but the AFR's have never done that before untill today.

 

If your running an Osiris set ecu the settings could be fine tuned for the a/f ratio. I know that when my Z was having this problem it died just like this when the filter came off and it was taking in too much air, so they can be really sensitive to differences in air flow. Its possible that you may have tuned the osiris with an extremely restricted intake (dirty stopped up filter) and now that its getting a lot more air your having issues with a/f. Don't hold me to it but I would definitely look into it.

 

i actually am running on the base map provided to me by uprev and the filter has only been on my car for about a year to date.

you had the same problem? how did you fix it?

 

He's not running an uprev, also you could of possibly burnt out the maf with the oil. I've seen it happen before. Try starting it with out the maf plugged in. If it does the same thing then you have your answer.

 

i am running uprev and the maf is not burnt by the oil. i took it apart and there is no oil residue anywhere. wouldnt starting it with the maf do nothing but the same exact thing?

from my experience with my 3000gt, if you start the car without the maf plugged in, it starts up and dies immediately.

 

hes saying that your MAF would be the culprit if it did the same (nothing) when unplugged as when plugged in.. im not sure maf fry is visible.
And i ve heard of that being VERY common after oilings too.

pretty cheap test to check it out tho...

 

thanks, i dont know how i could have mis interpreted that, sorry. gonna go check now, in a ****ing thunder storm none the less

edit: i dont think thats the problem because the car will still start and run and drive. without the maf plugged in it should just start and die, unless im mistaken. ill still check once this rain is calms down but i have my doubts

 

Fotunately for mine it was doing this as I was driving home and when I got there and popped the hood my JWT filter had fallen completely off and it was taking in direct air with no filter. My fix was putting it back on and tightening the hell out of it haha I would definitely check into the MAF and the ECU

 

the same exact thing happened to me before but i barely noticed that it was off. the car ran pretty normal, it was mainly a coincidence that i popped my hood and notice it came off.

 

Considering that you left the battery unplugged overnight you might just need an idle learn procedure preformed.

Either that or your TB needs replacing

 

the car still idles like normal so im a little skeptical about that too but why would the throttle body need to be replaced?

edit: as in the TB was bad before? i dont think it was because ive never had a problem like this before. everything ran normally.

 

That's what happened to me after I cleaned my Popcharger a long time ago but I think I used too much oil in the process that caused it.

The VQ TB's are known to go bad prematurely, but for me it was always when I did a cold start that the problem surfaced.

 

so you were in the same exact situation as me with the same problems?

one more video of the maf disconnected:

http://www.youtube.com/watch?v=u0C9eeG4BFU

im not touching the gas pedal by the way, the car also smell rich a hell. the check engine light also came on when i disconnected it. when i connected it back and started it up, the light was still on. i would check it with my cipher but the laptop that i use with the cipher is broken so ill probably have it checked when i go into the shop tomorow.

what do you guys think about this?

 

Exact same issue, I would start it in the morning and it would immediately die. Only thing that fixed it was replacing the TB

 

that is so weird, did you ever find out why?

there is one difference for me tho. from a cold start it wont die, it just dies when the engine is already warmed up.