help need assistance pleace!!!!

[DrifteRs13]

ok just a few minutes ago my car started making this weird noise then all of a sudden it droped to 2500 rpm and the started to shake reallly violently, so i shifted same with 3 and 4 and 5th i only max out at 25000rpm and then it shakes, i took it to a shop and they said my catalck converter may be cloged or my maf isnt working right pelase help me!!!

[smelly240]

sounds like the maf might be unplugged... thats like safe mode or somethin. I know with stock inj my car used to run under 2500 with the maf unhooked, then at 2500 it farted out...

got a friend with a maf? u made sure hte maf was hooked right? check contituity from the maf to the ecu? check ref voltage at maf? check if maf ground is good? check your signal voltage out of the maf (there are 3 wires on a 93KA or SR one should be 5v, one should be ground and the other is signal out)


please remember - this things connected to the ecu - use a Digital Multimeter/volt ohmeter... analog bad

[DrifteRs13]

...............................

[DrifteRs13]

ok this is the part that looked brok one day when i unhooked it, but this isnt a 240 so i knwo you know what i mean i just looked one of the progs were broken. please i really need to get this fixed and will it hurt my car to drive it like that, one of my friends said that a ball joint may have shot or somethign because iot happend wile i was driveing.

[PKaBooo69]

that is your maf. in what way does it look broken (i cant really see the pic)? if its a wire then its not to hard to reconnect. If its a prong (Ithink thats what you were trying to say) see if you can open the harness housing and replace the pin or try using a pin extractor from the back. if it doesnt look broken you can always try cleaning it. take off the airbox and spray some carb cleaner in there under rev. (good idea to do reguardless)


you got a bigger pic so I can actually see it? how bout a pic of the prong?

[DrifteRs13]

no that is a diff car i was just giveing an example, but yeah one of the prongs are bent. so do i have to buy a new one or just end up geting a z32 maf instead

[PKaBooo69]

if the prong is just bent then straighten it and make sure the wire is still connected to it on the inside. how did the prong bend? did you maf harness get disconnected when you were driving? Im a little confused. Depending on what happened and how it happen it may or may not be fixable.

a z32 maf would be a better route to go in the long haul anyhow. I'd replace with one of those. But if you are a little more descriptive or can give me a picture of what you are talking about I can try n help you fix it

[DrifteRs13]

i dont have a camera that works sorry but, i was trying to see before i knew anythign about maf sensors and stuff i unhooked the piece and i bent it , i replaced it and it worked again fine afterwards, but all of a sudden wile i was driving its starts shaking very badly (the whole car) SO THEN I SHIFTED AND IT KEPT DOING IT THReW ALL THE Gears.

[MasterOFDrift]

check that plug make sure it is connected.

If you want to upgrade to z32 maf you will need some type of Fuel control such as the apexi SAFC.

[PKaBooo69]

or flash your ecu for it, i'll see if i can find a write up on how to do that. its been i long time.

[DrifteRs13]

thanks alot........
message legnth

[smelly240]

wtf is ........

i told you what to check - what is the problem ? I explained it quite easily -

stick a t pin in the back of the wires goin into the maf plug - theres a white a black and a black and white... the black and white should be 12 volts - the white should give off voltages between 0 and 5 volts (car running - duh) and the blak should be grounded... if that isnt your case - read what i wrote before and check it all...

sounds to me like that bent prong isnt gettin continuity... diagnose the thing as i just explained - and if its related to your bent prong - solder a new plug from a same year car and get a new maf (junk yardin is fun - if u see a j30 or z32 get the maf, brakes (q45 too) or whatever else.

retuning a DOHC ecu requires a daughterboard - you cant just flash it

if u get a z32 maf you can use i believe 2 in and 5 out if im not mistaken on a KA with stock inj. (SAFC)

ford maf pic - good times./

[DrifteRs13]

the ... was because i wanted the post deleted but i count so i just used those to edit out the text. ok i will try that thanks.

[PKaBooo69]

Originally Posted by smelly240

wtf is ........
retuning a DOHC ecu requires a daughterboard - you cant just flash it

not so. we ran mine z32 maf with a stock ecu. we got it to run fine i just cant remember how. I'll have to check with ol boy at stock garage or find the write up. we also ran bigger injectors (550s) with the stock ecu. they never worked perfectly (found out later the ecu thought they were bigger than they were) but he had a 13 that did. I still have that ecu in the garage down stairs somewhere. want it?

either way i quit wit the riggin n run a power fc now. but it can be done

[Dream240]

Originally Posted by PKaBooo69

not so. we ran mine z32 maf with a stock ecu. we got it to run fine i just cant remember how. I'll have to check with ol boy at stock garage or find the write up. we also ran bigger injectors (550s) with the stock ecu. they never worked perfectly (found out later the ecu thought they were bigger than they were) but he had a 13 that did. I still have that ecu in the garage down stairs somewhere. want it?

either way i quit wit the riggin n run a power fc now. but it can be done

Okay I'm trying to understand why he would get a Z32 MAF to put on a supposedly stock KA? That would cause him to run incredibly poorly wouldn't it? I don't know much about the difference in the two MAFs but I would think on a stock car, get a stock replacment. Problem solved.
As far as the bad prong on the MAF.....how the hell did that happen? did you jam it with a screwdriver, or drop kick it? those thing aren't easy to bend due to the recessed setup of the prongs in the housing. Wierd. I would just go to your local junk yard and source one out. Best choice....if you've got 50 bucks laying around that is.

[DrifteRs13]

when i put it back in my friend hit it wiht a screwdriver to get it to set right , but idk it still worked after that,

[MELLO*SOS]

Your car only revs to 2500 because it is in limp mode, because the ECU cannot read signal from the MAF sensor. It will stay like this until you fix the problem... Try it on your buddy's car, unplug the MAF and start the car, I bet you can't rev past 2500.

You said the connector was broken or damaged, try to fix it if you can and if not just buy a replacement MAF or connector. Don't get a Z32 maf, without proper install/tuning it'll make your problems worse not better.....

[Dream240]

Originally Posted by mello88

Don't get a Z32 maf, without proper install/tuning it'll make your problems worse not better.....

WERD, AS I THOUGHT...

[DrifteRs13]

ok i called the shop and they said it MIGHT be the disributor, dose that sound like a posiblity?

[aznpoopy]

dude. they already told you what the problem is like 4 times.

Originally Posted by smelly

sounds like the maf might be unplugged... thats like safe mode or somethin. I know with stock inj my car used to run under 2500 with the maf unhooked, then at 2500 it farted out...

Originally Posted by mello

Your car only revs to 2500 because it is in limp mode, because the ECU cannot read signal from the MAF sensor. It will stay like this until you fix the problem... Try it on your buddy's car, unplug the MAF and start the car, I bet you can't rev past 2500.

[MELLO*SOS]

Check out your MAF wiring & test with another MAF sensor before looking at the Distributor.

What makes these people think it's your distributor, clogged cat, etc? Anyone who knows Nissans, knows that if the MAF unplugged the car is put into limp mode with a 2500rpm rev limiter. Start there dude. GL

[turboboost12004]

yeah its your MAF, just try to fins a buddy with another 240sx then, swap out MAFs, if it works great! if it dosent well........

[DrifteRs13]

i checked the cat, actualy i pulled my hole exhaust off and only running headers. still didnt work. well i will go down there and check it out they arnt open on the weekends so. sucks really bad

[Edgar]

sounds like the maf to me

something must be disconnected or leaking air

[smelly240]

OMG DUDE! I gave you specific instructions how to diagnose the car. I also told you its not the cat... It is something to do with the maf.

TO QUOTE MYSELF :

stick a t pin in the back of the wires goin into the maf plug - theres a white a black and a black and white... the black and white should be 12 volts - the white should give off voltages between 0 and 5 volts (car running - duh) and the blak should be grounded... if that isnt your case - read what i wrote before and check it all...

sounds to me like that bent prong isnt gettin continuity... diagnose the thing as i just explained - and if its related to your bent prong - solder a new plug from a same year car and get a new maf






its really easy - and you keep ignoring the fact that its the friggin maf or the maf wiring.

you even have a "known" bent pin - and you still keep looking at other stuff.

[aznpoopy]

this thread makes me lol.

person 1: maf
person 2: maf
person 3: maf
person 4: maf
original poster : hay guyz i chek the cat and it still no work wat is wrong/ lol

[DrifteRs13]

hah yeah funny, the shop said distributor because i already rulled out the maf, it worked, all air was getting to needed places. so again would a messed up distributor put the car in limp mode as well. This thread was created to help me not flame on something i ruled out almost 10 min after reading the fist responce.

[smelly240]

Originally Posted by DrifteRs13

i dont have a camera that works sorry but, i was trying to see before i knew anythign about maf sensors and stuff i unhooked the piece and i bent it , i replaced it and it worked again fine afterwards, but all of a sudden wile i was driving its starts shaking very badly (the whole car) SO THEN I SHIFTED AND IT KEPT DOING IT THReW ALL THE Gears.

you realize you messed up the maf right there... you didnt check the maf with a dmm did ya? air getting to the maf does not mean its working. 2hrs after you replied you still hadn't checked the maf. if you wanna change the distributor - do it - its your car, but i tried to walk you through this and you refuse to accept my advice.

[DrifteRs13]

i dont have it the shop dose i aprecieat the help trust me, but i think when i bent the prong, after driving it it just loosend and fell off. when i looked it wasnt there and i have been trying to find another one.

[smelly240]

so wait - if you dont have a prong on the maf - why the heck are you trying to find the problem without fixing that!??!

If you took the car to a shop - they should have fixed it already. Like 10 people told you to get a maf, and you still want a distributor or a cat, or something else to blame even tho you know u have a bad maf.

i am sorry, but i cant help you...