Another insufferable maf code post

Ommateal

Truly sorry for another p010c (Bank2) post and a possible p102 (Bank 1) But that could of been a mistake when switching the mafs around as stated below. Mass air flow (MAF) sensor/volume air flow (VAF) sensor low input - this is leading to some kind of "hickup/misfire" during acceleration, and even full on bogging out after its hot and sits for a few and leading to misfire code p0300.

Engine is totally stock.

We are pretty sure it's not the maf its self (tested a working maf and the two original mafs and switching them all around) my buddy thinks it may actually be at the Ecu.

Do the mafs ground at the Ecu or elsewhere?

Chance the female connector is bad right there?

any other ideas?

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Red 370z Sport 6m
Mods: Stillen 25 row Race Oil cooler|FIXED ESCL|Muffler delete|TEIN Springs|Tint|Varrstoen ES2 Rims|NRG Stealth Knob|Kenwood touchscreen|

SouthArk370Z

Schematics, pin outs, etc are in the FSM. May also have a MAF testing procedure (eg, voltage at different flows).

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Ommateal

Yeah I checked the Fsm I don't see any wiring diagrams for it if there is a full Maf wiring diagram somewhere in the Fsm I don't know where it's at since it came as a ton of Pdfs. Deff found the Troubleshoot and voltages ect but nothing showing me where it actually grounds at And from my dumb little Meter it seems ok at the actual maf. Thanks Ark.

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Red 370z Sport 6m
Mods: Stillen 25 row Race Oil cooler|FIXED ESCL|Muffler delete|TEIN Springs|Tint|Varrstoen ES2 Rims|NRG Stealth Knob|Kenwood touchscreen|

SouthArk370Z

It sounds like you found the main things - t/shooting and volts.

Yeah. It can be difficult to find things in the FSM. Many PDF readers will search all PDFs in a folder. Put all the FSM PDFs in a folder and tell your PDF reader to search that folder for "MAF +schematic" and similar.

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Ommateal

Ahh yeah was already trying that haha but didn't use "Schematic" But still nothing pulled up, also tried "wiring" before.

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Red 370z Sport 6m
Mods: Stillen 25 row Race Oil cooler|FIXED ESCL|Muffler delete|TEIN Springs|Tint|Varrstoen ES2 Rims|NRG Stealth Knob|Kenwood touchscreen|

SouthArk370Z

I got curious so I tried searching the FSM. Didn't come up with a schematic. It's probably in there, I just don't know how to find it.

You can also follow the connector/terminal info. Find the conn/terms at the sensors and follow back to ECM. Pg EC-174 says F31/4 is the ground terminal at the #1 sensor which ends up at F102/68 at the ECM, passing through connectors E106, M6, and M116.

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Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

Chan Chee Hoe

By the way,does the MAF needs cleaning with Contact Cleaner.?

Ommateal

I have cleaned them both, thank you for the post

Issue is still present.

Maybe a Computer issue? Maybe I should try cleaning the throttle bodies?

__________________
Red 370z Sport 6m
Mods: Stillen 25 row Race Oil cooler|FIXED ESCL|Muffler delete|TEIN Springs|Tint|Varrstoen ES2 Rims|NRG Stealth Knob|Kenwood touchscreen|

Ommateal

Well threw on TWO brand new but cheap MAFS and cleaned the throttle bodies today. Slightly more responsive but it is still deff not fixed, after driving for a while it is still misfiring for sure, I let it chill for about 20 mins then went out to start it and got some major misfires I could feel shake and pop. Idk what else to do. MAP sensor? Harness shorted out?

__________________
Red 370z Sport 6m
Mods: Stillen 25 row Race Oil cooler|FIXED ESCL|Muffler delete|TEIN Springs|Tint|Varrstoen ES2 Rims|NRG Stealth Knob|Kenwood touchscreen|

SouthArk370Z

Are you still getting the P010C with the new MAFs? If so, I would suspect a wiring problem. If wiring is OK, may be the ECM.

I suggest getting a OBD/CAN monitor that will allow you to watch/record variables.

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Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

Ghostvette

OP, you bought this car used correct? Have you run a VIN check through CarFax & AutoCheck? I'd look around the ECU for rust or signs of water damage. It's beginning to sound like you bought a flood damaged car.

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Ommateal

Thanks Ark, I Haven't got any codes read since Before the install of the two new Mafs (just a few days ago) CEL Hasn't come on again but it is deff still messed up -

Cold Engine starts and drives mostly fine (some power loss still over 3k rpm/misfires) But after letting it get hot 180~220 it has a chance of bogging and especially if I turn it off and let it sit for a little bit and restart it it runs like **** or stalls almost like it's gas flooded or starved? (This is All the same stuff thats been happening since I originally got the codes)

I'll Try to stop at a friends and see if the same codes are triggering and update here accordingly

Also it's a clean tittle with one minor accident (car was towed out of a small ditch No airbags deployed, very minor damage to one Wheel)

__________________
Red 370z Sport 6m
Mods: Stillen 25 row Race Oil cooler|FIXED ESCL|Muffler delete|TEIN Springs|Tint|Varrstoen ES2 Rims|NRG Stealth Knob|Kenwood touchscreen|

Ommateal

Had codes done by a very nice scanner, It looks like since I changed the Mafs those have not shown back up, the Major codes I got this time were Lean Bank codes 1 and 2

P0171 Lean Bank 1 - This was stored when I ran the codes
P0174 Lean Bank 2 - This showed up after a clear -

Then my car died After letting it get hot for a while, We took a break, I went to leave, and it sputtered and stalled until sufficient time passed it cooled and was able to start.

We are possibly leaning twords a fuel issue now that maf codes are gone.

Failing pump?

Just to be thorough and for knowledge in the post, Here is a full list of codes that first pulled some may be redundant and coincidence from messing with stuff, most are my steering lock (pulled fuse) I think.

B2014 - Chain of Steering lock BCM
B2562 - Low Voltage
B2607 - Lock Relay
B2609 - Lock Status
B260A - Ignition Relay
B26E8 - Clutch Interlock Switch
B2109 - Lock relay off

Engine stuff

P0300 - random multiple Misfires
P0171 - Too lean Bank 1
Po174 - Too lean Bank 2

Thats all I got this time around.

__________________
Red 370z Sport 6m
Mods: Stillen 25 row Race Oil cooler|FIXED ESCL|Muffler delete|TEIN Springs|Tint|Varrstoen ES2 Rims|NRG Stealth Knob|Kenwood touchscreen|

SouthArk370Z

When was the last time you serviced your car battery? It may need distilled water or replacement.

Did you do a re-learn after cleaning the TBs?

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Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

Ommateal

No too sure about that battery exactly but I have used two different batteries so far since the issue has happened , they show consistent voltage. And no change of symptoms improving between either battery.

And Which relearn do you speak of exactly? Idle relearn?
Ala: http://nissanhelp.com/diy/z/projects...e_learning.php

Also lslightly off topic, but SouthArk or anyone, do you know What shape fuel Strainer we have? Is it the Moon/Half circle shape? Or square bag shape?

__________________
Red 370z Sport 6m
Mods: Stillen 25 row Race Oil cooler|FIXED ESCL|Muffler delete|TEIN Springs|Tint|Varrstoen ES2 Rims|NRG Stealth Knob|Kenwood touchscreen|