Mr.Duck

iTrader: (8)

hey guys, on our 96 i30 when accelerating the tach goes down from the idle 700-800 not up... but the engine is reving up.... you can hear it, these are the three codes i pulled

p0150(o2 sensor)
p0325(knock sensor)
p0130(??? in the stickie there are 2 diagnoses, o2 sensor or closed loop control??)

what could the problem be? kinda scared my sister, boggled my mind...

HELP!

BlueC

iTrader: (5)

How far down does it go? Does it happen all the time?

Tim96I30t

iTrader: (2)

Knock sensor will srew up performance bad

Mr.Duck

iTrader: (8)

ionno if it happens all the time, my sister told me about it, and i reved it in park and it went down.. kinda scared to push it any farther... ive never heard of this ever happening... im more than confused right now...

lilaclucymaxima

iTrader: (16)

It won't make the tachometer go down while accelerating.

Mr.Duck

iTrader: (8)

lol exactly what i was thinking.. anyone have any ideas!?!?!?

Mr.Duck

iTrader: (8)

*bump* *bump*

Mr.Duck

iTrader: (8)

no one knows?!?!?!? im really confused here

Rotncarcas

Dont tilt your head upside down when you are pressing the accelerator.

Could be a tach gage problem? Rev it and see if it revs healthy

jetblack5spd

same thing used to happen to my 96 maximas temp gauge. when accelerating it would bounce down and up again. after i installed my intake it went away and never happened again. i dunno im just saying

MorpheusZero

iTrader: (10)

Right. That's really weird.

An intake won't solve your problem if that's what you're trying to say...

Anyway, replace your appropriate sensors because you will want to regardless, and look into the "closed loop control" diagnosis.

In the meantime, BUMP for a guy who needs some help.

Mr.Duck

iTrader: (8)

anyone think that its a bad idea to drive? i mean the engine is still reving correctly and al...

RockfordMax

iTrader: (2)

Well sounds like an instrumentation error, if the engine doesnt sound like its decelerating, then it obviously isnt... if all else fails... stealer?

kormax97

How's it ride? Does it shift correctly? Does it happen when it changes gears too or just in nuetral or first gear? Was the check engine light on when you pulled the codes or was it ghost?

Mr.Duck

iTrader: (8)

well i personally havnt driven it yet, but i believe that it still is shifting correctly, the check engine light has been on for a while, maybe ill reset it and see what pops up next

Rotncarcas

drive it

^^^

Mr.Duck

iTrader: (8)

when it shifts the rpms go back up to abour 1k rpm, and than go down again.. drives fine... any safety issues i should be worried about? or does it seem like its just a guage problem?

kormax97

so the rpm never really goes up to where it should be but the car seems fine? anything else not working in the gauge? maybe it's just the tach part that has some kind of faulty connection or something.... then it shouldn't be a big problem.

diy_dreamer

Does this happen when it downshifts? At any other time the needle seems to be working but it's really about 1k lower than where it should be? If that is the case, then we have the same problem (95 max auto). In my case it's the tachometer that's bad and I have to change the cluster. I've had it like that for almost a year now and no problems (no codes either). It does work sometimes though, but only when it feels like it.

8ender

Mine also pins itself to 0 whenever I accelerate. The rest of the time it sort of wavers between 1 and 2k rpm. Oddly enough at idle it seems accurate.

'96 B-rad

Way to bump a 5 year old thread..

8ender

Ahh shoot, didn't notice the dates when I was searching. Well I have the problem described in my post above. In the five years since this post has anyone else had this problem?

Car rides great otherwise. It is an automatic so its not really important that I have the tach working but I like to see my RPM.

Denoe

Hey guys,
I have kind of the same problem with the rpms.
they rev fine when im driving but then when i come to a stop it goes down to 0 and stays there. after I start to drive again, it still stays in 0 and after like 10 second it goes back to normal. by the way it just started doing it today when i was going home from work. Any advice?

stamar

Fixing this problem will be too great a pain.

Taking out the gauge if that is indeed the problem often causes breaking something if you are not an expert.

I recomend living with this.

99zx2

iTrader: (3)

maybe the ground connection needs to be cleaned? not sure where it would be on a maxima (new to the nissan scene). make sure your battery terminals are clean as well.