I hate my car

[daniel577h]

i get code 12 and 34 i cannot get rid of these, i replaced knock sensor, re wired straight to ecu to pin 23 with shielded wire and shield to ground, still get code............. and for maf i re did wiring and new sensor, still same, car wont even run with it plugged in, it runs smoother with it un plugged but i cant rev over 2500 rpms... ive been trying to figure this out for a while now, i think there is something mechancially wrong with this car. if you can give advice please do i dont know what to do anymore.

[boost_boy]

i get code 12 and 34 i cannot get rid of these, i replaced knock sensor, re wired straight to ecu to pin 23 with shielded wire and shield to ground, still get code............. and for maf i re did wiring and new sensor, still same, car wont even run with it plugged in, it runs smoother with it un plugged but i cant rev over 2500 rpms... ive been trying to figure this out for a while now, i think there is something mechancially wrong with this car. if you can give advice please do i dont know what to do anymore.

I hate to say it, but you wired something wrong. And though you may have connected your knock sensor to the correct pin, if the afm or it's wiring is screwed, it will give you the same two codes you've been experiencing.

Dee

[float_6969]

The ECU can sometimes do screwy stuff if you burn it up. If the MAFS was wired up incorrectly and the wrong voltage was sent into the ECU, it could fry it pretty easily.

[daniel577h]

im pretty sure i didnt fry it, cuz it only starts and idles fine with MAF unplugged, if i plug it in it dies, and if i start to tap on it stumbles, but i tired 3 diff ones would they all be bad? if not im gona re wire again using only the FSM to re pin straight to ecu and nothing else in harness. any thought on the maf?? cuz im stumped, i went to dealer for a estimate on new maf it was 570$ so before i spend that much i want to see what you guys think

[daniel577h]

opps forgot to mention, whats better 4 pin maf or 3 pin i have only tried 4 pin ones, but i have both ikinds of plugs and sensors i also have a 300zx one if i should try that one, not sure if i can without chipping ecu, and what wires go in the pins at ecu , i want to double check if what i have is right,.

[dattodude]

It might be time to give up, and buy something else. Life is too short to fight something without a pulse. There are plenty of women on earth that will be quite happy to provide you with the level of frustration and arguement to give your life an appropriate level of purpose.

Otherwise...good luck :-) I think you need to trace all the wires, and find a friend at an importer so you can try things without emptying your bank account.

[rexhunta]

you say it runs better when your afm is d/c ?? cause this is how i found i wired my rb20 afm wrong, the car would idle perfect when i d/c the afm itself.. mayeb you should recheck the wiring to that, or see if someone has a spare to try ?

[float_6969]

I really think the MAFS is wired wrong. You need to check the wiring. If you don't know what or how to do it, let us know and I'll walk you through what to do.

[daniel577h]

k walk me through, i have a 4 pin, 3 pin and Z32 maf and plugs for each one and a couple of each AFM, just tell me what wire goes on which pin thanks

[capwred]

your having the same problem as me.if you find something out let me know.by the way mine ran fine until i had to adust the timing belt it was off by one tooth.and then when i hook it back up it would not run witht he maf pluged up and im ready to shot my car.

[89'ClubK's]

I've had the same problem, and my cousin (mechanic) rewired everything for me including the O2 wiring and ECU wiring. My problem was in the wiring. Are you using a SAFC II to adjust the A/F for the Z32 MAF?You need it anyways for the B.O.V, unless you're recirculating. You're getting alot more air than the ECU and factory 370cc injectors are set for. I set mine at 2IN-6OUT. Runs much better!!Check wires to the ECU, the voltage of the MAF, and test the dropping resistor. Good Luck!

[capwred]

ok i tried something toay and it made it run better much better.well first i double checked all my wiring and it was fine.then i checked the plugs a little black but still good.(i did clean them before i put them back n).so i was sitting there scratching my head and i turned the fuel up on the safc2 and it runs alot better.but it still isnt right.i dont thnk i should have to turn my fuel up that much to make it run better.im running a 255 fuel pump,444cc injectors.do you think the fpr is gone out?i have it is there some way of checking it?

[ccasey645]

That 255 warblo will deffinately over run a stock fpr.

[daniel577h]

i do have a walbaro pump but it seems weird cuz, now i got rid of the codes, seems that the ecu needed more grounds and now it will rev to 8+ k but............. from 1-4k rpm it will bog very badly it have to keep steping on it without holding it down to get it up, and it still dies with maf plugged it even though i get no codes, cehcked for vacuum leaks couldnt find anything, does the little motor for a/c and air mixture do anything, cuz mine is like whistling and its very annoying.

opps forgot to put im using a stock KA24E maf

[float_6969]

Have you tried unhooking the SAFC?

[BLKTOPS14SR]

My brothers car last night was acting extremely weird. It would idle in park or drive just fine, but the moment gas was applied it would bogg down and won't rev past 2k rpm + it won't shift into second. His car is an automatic. Any thoughts on what is going on here. He's currently running: Z32 MAF, Walbro Fuel pump, SAFC-II, stock 370cc injectors and Factory SMIC.

[capwred]

sounds like his maf has gone bad or the wiring came lose.

[daniel577h]

i dont have a SAFC and have no Z32 maf hooked up, its wired right or it hasnt come loost anything you guys can think of? can you tell me what color wire you guys have on the MAF and which prong Prong A B C and even D just incase i want to use a 4 wire maf thanks

[float_6969]

Do you have a stock CA MAFS available to try?. I can't seem to find the thing that tells you how to wire up the KAE MAFS. I still really think this is a wiring issue.

[float_6969]

i cehcked for vacuum leaks couldnt find anything, does the little motor for a/c and air mixture do anything, cuz mine is like whistling and its very annoying.

Are you sure the whistling isn't a vac leak?

[daniel577h]

yes im sure cuz i sprayed lot of carb cleaner and as soon as i unplug it goes away, if anyone can tell me how to wire a 4 pin maf please help me out

[float_6969]

What MAFS are you trying to hook up to it again, a SOHC?

[daniel577h]

yeah its a 3 pin, sohc....i unplug it and it runs better, plug it back in putt puttt putt dead! or runs like dookie. (lil off topic, but is there some sort of like maf ecu kinda like supra's?)