rb wont rev over 2gs (trouble shooting)

[POOPmouth]

everything is hooked up rightiv seen post before about this but can not find it anymore- her is my ?- on the MAF - there is three wiresthree are hooked up- as for the last wire its black?silver doted oneis that the ground - if anybody has suggestion will help thanks
Modified by POOPmouth at 11:13 PM 3/29/2006

[RB20DETodd]

everything is hooked up rightiv seen post before about this but can not find it anymore- her is my ?- on the MAF - there is three wiresthree are hooked up- as for the last wire its black?silver doted oneis that the ground - if anybody has suggestion will help thanks

if u cant rev over 2 g's i thiks its the maf

[Carl H]

pull codes from the ecu, will tell you with the quickness.

[Darius]

Click on this link and scroll down. Wulfgang explains what each wire leading to the MAF is for.

zerothread?id=141774

[POOPmouth]

i had a another maf put that one on -BOOM- same thing kept happingpressed the gas and it goes thenbounces back and forthtryed to drive it and I couldnt go out of 1st coundnt get no speed- my maf wiring is pretty long - so im going to try to shorten it -when i turned the key my ecu dosnt blink any other suggestionanything ccan help right now

[Carl H]

have you pulled the codes yet?they will help isolate the problem, if not tell you whats wrong.

[POOPmouth]

havent - will go pull codes right nowthanks

[POOPmouth]

ok check codesi tured it clock wise then 3/4 backit had 1 slow 2 fastso code 12what is it - ?need help -[email protected] is my email email me ur advce if u couldor just post herethanks again

[POOPmouth]

iv been looking for what code 12 isfrom what i found it is the MAFis that correctplz let me know thanks carl H

[POOPmouth]

OK- i took about 1ft 1/2 off of the MAF wiringso its short and closebut still haveing the same problem-will rev up to about 2rpm then starts bouncing -? could the intercooler be effecting/ or causing itother than that 12 code is the only code blinkingchecked plugs / swtiched maf,s still no luckdont know what else it could -just puzzled

[POOPmouth]

also im using the stock fuel pump - could that be what restricting air flow- plus wouldnt the ecu bring up a code for that mmmm intresting -

[eh?]

bad wiring or maf . recheck the wiring. Usually it's the wiring.

[Carl H]

if you rechecked the wiring and its is indeed correct you may have fried the ground inside the ecu for the maf.happened when we put a z32 maf on my buddies ka, wire diagram was wrong and the ecu got power thru the ground and shorted, i bypassed it by going to the main ecu ground and its worked fine since.

[POOPmouth]

mmm main ground to the ecui dont understand- or maybe its just to early for mebut going to check it the wiring again

[armysweitzer]

if the ecu isnt powered when you turn the key then forget about starting the car. You need to run power to it but i forget the pin # .

quick search, pin 59! use a multi meter to see if it has 12v. If not then wire one from a 12v source and be on your way

[POOPmouth]

ok - i check all grounds - ( seen 2 )on by the fuse box and other to maf-my ecu is being powered - i dont belive my maf is -made sure everything is pluged in - i check my maf wiring - is the power wire the black /silver strip wirefollowed that it goes off to the motor not ecu - are u talking about pin 59 being /59 Control unit power supply/ and thats powering the ecu and maf - am i understanding that right- i will go and check pin 59 to see if 12 volts are running thow it - if not ill splic somthing in and try againthanks- will keep trying

[POOPmouth]

ok - everything checked - it comes to this- if some one could check ther maf wiring for me and just post the color code-plz just trying other things tothanks

[POOPmouth]

ok armysweitzer i checked pin 59 and yes there is power going to it- still no power going to the maf-what powers the maf -on the maf wires - this is how i have it wiredwhite - whiteblack/ silver striped / to black / silver striped black to black and the last one is a ground- still no luck with passing 2 grand -

plz u mentiond bypassing the main ecu groundhow and were is the main ecu groundhavent tried that one yet

[Carl H]

i said nothing about bypassing the ecu ground, i was simply stating that you may have burned the maf ground which would cause the ecu to throw a maf code.you may need to rewire the maf ground to an alternate ground if this is the case.

[teddy]

Would shielded wiring be necessary for a maf?

[POOPmouth]

ok thanks for clearing that up carl Hwill move ground to alternate placeand see if things will go my way thanks

[POOPmouth]

ok searched for more info found this MAF wiring dyagrampin 1. no connection - pin 2. Shielded , signal wire- Black / silver striped - ? about that on the rb harness it has the black /silver striped . i have it going to that one. Wrong or writepin 3. unshielded, Ground ( black) ? now this wire is with the whitre wire there both sheilded - it says ground ? should i ground that wire - yes - nopin 4 . shielded , signal ground ( white) going back to the ECU no i have that one going to white- im sure that right.pin 5. unshielded, battery ( black/ Whitre) now were does ths wire go- when i got my car back it was connected to the black/ silver striped and the black / silver striped wire he said was a ground but this info says other wisecould somebody explain this or set me rightthanks - i took it for a drive still same thingwont go past 2rpm then bounces like always

the signs im saying - could they also be happing becasue a boost leak in the intercooler piping

[POOPmouth]

damit nothing helps - what really makes me madis when i take my car back to the shop its probley somthing that i over looked and BOOMits going to drive fine i just have to PAY MORE MONEYdamwell thanks for all the info i gues i have to take it back****

[POOPmouth]

Up dated - had wiring checked 3 timeseverything - found out no signal from ecuwouldnt keep a volt signal - in process of looking for rb20det ECUso if u have on let me know thankscash in [email protected]

[eh?]

Are you getting 12 volts to the MAF?

[POOPmouth]

ecu wont hold anythingplus yesno volts going to itwont keep them

but no go

[POOPmouth]

CAR is running- problem solved- ecu wasnt sending a ground- **** - got new one-mmmm gets power now- but still the car wouldnt rec past 2gs - messed with MAF plug turned out that the pins were being pushed out everytime it was put on the MAF sensior- pushed the pins all the way in - bent the ends so it would stay - BOOOOOOOOOOMMMMMMim now driving my rbpowerdS13-id like to thank u nico members for the HELp and partsThanks again - will keep u updated on furtur modsthanks again

[Carl H]

yeah from what you were describing it sounded like you had fried the grounds for the maf, usualy happens if the maf wiring is botched happened to me once.

[POOPmouth]

Yep but its all taken care of- thanks agin for the HELP

[RB20DETodd]

if u cant rev over 2 g's i thiks its the maf

Nice feeling of relief, the best feeling ever!