4DGA32

When i accelerate, my max wont go pass 40km.. it has 230k on it.
Car idles low too.
Been searching and the only possible reason i can find is a bad maf sensor?
Are there any more suggestions on what the problem is? There is a check engine light but its a P0446.

CallMeThatOneGuy

iTrader: (2)

Sounds to me like the car is in limp mode. What year is it? I think that code translates to a leak in the evap system. Idle issues is usually the IACV but seeing as how you are not going over a certain speed, that doesn't seem likely.

4DGA32

Its a 1998

CallMeThatOneGuy

iTrader: (2)

https://maxima.org/showthread.php?t=368575

maybe that will help with the CEL

BlackThornDemon

Are the rpms normal?

4DGA32

No, its so low, car idles at 500-700, it sometimes stalls when the rpm goes really low.

Everytime i start it i gotta press the gas so the car wont die.

4DGA32

And when the car is fully warm for like 10 mins it idles normal.

CallMeThatOneGuy

iTrader: (2)

That kind of sounds like a vacuum leak.. My car did that for a while when my top egr tube came a little loose and the gasket wore out

Max_effecT_

can you rev the car in neutral through the entire rpm range? i had a faulty maf and i coudlnt do over 50ish and my rpms would not exceed 3000. when i would start it it would stall pulling up to a red light until it was warm.

BlackThornDemon

I'd start with fixing the evap leak.

When you have more than 1 problem it gets harder to diagnose. So fix that evap leak and see if symptoms change.

4DGA32

yeah getting a EVAP canister tmrw at the wrecker so hopefully it helps

4DGA32

cleaned my whole EGR tube long ago, added a new gasket too. But im going to check the hose beneath it.

BlackThornDemon

In the mean time, give us some more info.

When did it start?
What were you doing?
etc.

4DGA32

so i fixed the issue, egr connections wasnt properly connected... as if i missed that. Now the car is idles fine, and doesn't stall! BUT it still wont pass 40km, i contacted the old owner, and she said it had a tranny rebuilt from her mechanic a year ago...

CallMeThatOneGuy

iTrader: (2)

We'd need more details. Sounds, codes, lights, speed, etc.

4DGA32

i think the car is in limp mode. is there a way to fix it? what do i reset?

the only code i got was the P0325. which i the knock sensor. Im going to try to replace it on saturday. and ill get back at you. Also i will get a new maf sensor.

CallMeThatOneGuy

iTrader: (2)

Yeah do the KS and MAF and then get the codes cleared. Make SURE there's no other codes too. Make sure you go with OEM parts. Sometimes used is better than auto zone... as far as te MAF goes, at least.

maxinout93

Im leaning towards a bad maf also. I remember I accidentally left mine unplugged and drove the car and i could not go past 40mph check engine light came on, and I pulled over, and said wow forgot to plug this thing bak in lol!