welp she runs, but having idle problems

[j-z]

ok so i just got my deatschwerks injectors yesterday and put them in. when to go fire her up after that but the battery was dead. after being on the charger all night i woke up this morning and fired up. first try and shes alive! i wish it wouldve been like that from the start though (got sold shlt injectors off ebay). ok she will fire up, but i have to keep my foot a little bit on the gas to keep it alive. i have the afc leaned all the way out to -50 at 1k rpms and the fuel pressure is where its supposed to be. im thinking my z32 maf is bad. anyone know how to check if its good or not? i got it from a member on here and they never said anything about it being bad, or good. i know its wired correctly as well. so this is what i have that we can look at. s13 240/248 cams which i know are timed correctly. number one at tdc and theyre both facing outwards. safc, deatchwerks 555s, and a walbro with megan fpr. im running a z32 maf blow through setup on the cold side with a hks racing bov on the hot side. my boost gauge was showing awesome vacuum for just starting up the motor and not even driving it. thats why im thinking its the maf because theyres nothing else it could be. would a bad maf cause these conditions. if i give it too much gas itll just sputter down and die. how can i check my maf?

[GEO]

bad maf = can't rev passed 3K

[j-z]

well that helps a lil. how would a car act with a bad maf? i dont know cause ive never came encounter with a bad maf. is it sensitive to how you touch the gas? im thinking maybe i could have the maf wires backwards? but i did my wiring according to jwt via cheezedik. the white goes to white, the black/white goes to black/white, and the orange and black on teh z32 harness or grounds while one goes to the stock harness and the other to the chassis which is how i have mine done. i have the stock maf which i know is good so i might just put that one on there if i dont get any helpful info soon.

[Jookmasta]

what's the vac? also do you have a wideband? you would be able to tell if its dieing due to being too rich or too lean. sounds like you wired up the z32 properly. whats your in and out settings on the safc for it?

[BillKlineVT]

whats your in and out settings on the safc for it?

good question... I had to set mine at 1 IN 6 OUT to get it to idle when I had my SAFC2 / 550's / Z32 setup... the 2 in 5 out just wasn't cutting it

[j-z]

yeah i confirmed that i wired up the z32 maf correctly with a multimeter. my in out settings are 2 in and 5 out. i tried messing with those but it still acts the same, so its not that. my vac gauge when i could get it at a clean steady idle was -20. im thinking i have a vacuum leak. cause i went out there again when i confirmed my wiring on the maf and started her up again. i had it idling on its own somehow for like 5 mins straight almost. while that was going on i jumped out of my seat and inspected everything in the bay. it wasnt a clean steady idle at all because i didnt have my foot on the gas to steady it out. the entire motor was shaking back and forth. i put my ear down toward the intake mani just to listen and heard some hissing. so with the motor shaking, and hearing that hissing makes me believe i have a vacuum leak somewhere. i retorqued my upper to lower mani bolts again, and took off my egr plate i made. the egr plate was def not the problem as the gasket sealer was perfectly sealing it. while i had it off i started the car up and it revved alot more free when i first started it up. it still acted the same though. i also moved the dizzy back and forth and that changed nothing as well. the thing that stumbles me the most is when i open the throttle more than just trying to keep the idle steady it instantly dies. WTF? does anybody have first hand experience with a bad maf???!!!????? damn this sucks balls cause all i want to do is drive my car! where the fuk you at rick?

[deviousKA]

Check your maf voltage at key on, idle, and with a throttle blip if possible.

And check ecu codes.

[PapaSmurf2k3]

this sounds alot like what is happening to me, except my vac. is around -3, and i can rev as high as i want... it just doesnt run well.

[j-z]

i didnt try that today. im assuming thatll confirm the maf is good. its gonna be hard to do that with how the car is idling, but i guess ill get my dad to look at it while im feathering the bltch to keep it alive. ill def do that though. i need to get some carb spray as well. will an ecu code throw one for the maf? i forget how to check the codes but im pretty sure itll say in the fsm. would a bad maf cause the problems ive listed?

[PapaSmurf2k3]

I do beleive a bad maf would cause the problems youve listed. Think about it, if the maf is bad, its incorrectly reading the ammount of air, therefore, the ECU doesnt know how much fuel to send to the cylinders, causing lack of power, ability to rev, etc.

[j-z]

my thoughts exactly. cause even if i did have a vacuum leak id still be able to rev all the way up to as far as i wanted. i cant get it past 2k at all period. ill try and do what devious said if i can keep it running. if not, i have my stock maf and ill put that in. i kinda hope thats what it is, and then not cause i just paid 140 to a nico member on here for that maf. i dont want to start jumping to conclusions, but if that is the case best bet youll be getting an email once its confirmed. another thing is when id try to keep it running and get the idle up just a bit i could see a lil bit of black smoke and thats leaned out at -50 on the afc and the fuel psi down.

[98240]

A good way to tell if your maf is bad is if you are throwing a code. I had a bad maf and no matter what I did with my safc nothing would change. It ran extremely rich all the time but when i went to tlean it out the car would just die. Well i ended up getting a new maf and it solved all my problems. Also i did the blow thru maf setup and that seems to have worked pretty good.

When i would uplug the maf it would actually make my car run better. Then when i plugged it back in the car would die. Hopefully that helps

[GEO]

Yep its your maf... Put the stock MAF back on and start the car, see if ti idles correctly. haha Why haven't you done that already?!

[j-z]

LOL because that means i have to rewire it. im gonna go out there now and switch them out. first im gonna unplug the maf and try to start it and see if that makes a difference. would an external/remote adj fpr give off a hissing noise at idle? cause when i was listening thats the area where it was coming from and those damn injectors are sooooo loud i couldnt pinpoint the exact area. bltch sounds like a damn diesel lol.

[j-z]

ok, i switched back to my stock maf and things are ALOT better now. still got it running blow through as thats how i designed my whole setup around. i can rev her all the way out now with no hesitation what so ever. so yes i did get sold a bad maf!!!! wtf ive been sold $450 worth of bad shlt on this build and that makes me really upset. .now shes running pig rich. the whole time she was running it was blowing major smoke out the azz. i still had my afc leaned out all the way to -50 at idle. i changed my in/out setttings back to 5/5. i pulled all of my plugs and they were all evenly black. now it seems like something simple to fix. what that is i have no idea. maybe mess with the afc some or the fuel pressure. suggestions???

[j-z]

ok, i switched back to my stock maf and things are ALOT better now. still got it running blow through as thats how i designed my whole setup around. i can rev her all the way out now with no hesitation what so ever. so yes i did get sold a bad maf!!!! wtf ive been sold $450 worth of bad shlt on this build and that makes me really upset. .now shes running pig rich. the whole time she was running it was blowing major smoke out the azz. i still had my afc leaned out all the way to -50 at idle. i changed my in/out setttings back to 5/5. i pulled all of my plugs and they were all evenly black. now it seems like something simple to fix. what that is i have no idea. maybe mess with the afc some or the fuel pressure. suggestions???

[Florida240sx]

MY idle with 555 was kinda rough. It was fine for me. If I had my a/c on it was smooth. But if no a/c it was a little jumpy., had to blip the throttle a little bit to keep her alright.Get a better ignition system. Check your oil immediately. Makes sure you didn't tear an oring. Thats how I ruined a perfectly good motor.....

[j-z]

yeah i checked my oil already and its clean. if i let off the throttle itll die because of running so rich. what do you mean about an oring? on your injectors? how did it ruin your motor, just curious.

[gaehrings13]

I just finished installing a n62 j30 maf on my car and it wouldn't run for anything, so I rechecked the wires like you did and everything was fine. I also had the safc setting at 2in and out5. Like that I couldn't rev the engine at all. Then I read that another person on some forum set it at 2in and out6 wich is what I have it set at now and it runs perfect now. But I still have stock injectors and stock fuel pump. But it was running pretty bad when the safc was incorrect and I even thought it was a bad maf or I hooked it up wrong. But I only paid 35 dollars for mine lol, from a junkyard. It was first time hooking up something like this and that maf is so much bigger than the stock one. I need to get some injector and a fuel pump now so I can actually run some kind of boost I can't even step on the gas yet lol.

[j-z]

mine was def a bad maf. it wouldnt run for shlt with the n62 hooked up. i mean i couldnt even get it it to rev at all without it dieing. i even tried messing with the in/ out settings and it still acted the same. now that i have my stock one back in i can rev it all the way up and get a lil flutter out of the turbo, but something still isnt right. the plugs are pitch black. my fuel pressure gauge goes to zero when i cut the motor out. should it still hold pressure after shutting the motor off? oh yeah, its more like i have 560s lol. that was the average of all 4 injectors and two of them were 562cc, and i forget exactly what the others were. i still didnt get any carb spray to check for vacuum leaks. the motor dies when i let my foot off the throttle, but its real easy to keep it running unlike with the z32 crap maf. also, when i go to start it up i can turn it on without my foot on the gas at all and shell fire right up and then die like a second later. thats how it always acts everytime.

[gaehrings13]

Are you sure none of the injectors are leaking, also are all the cylinders firing. Im sure you know, but if an o-ring has the slightest little tear in it, it starts to run like ****.

[j-z]

they were brand new orings that came on the new deatchwerks i just got. came with o ring lube and i put that on every oring. yes, all cylinders are firing as all plugs were black. i just popped the injectors in, so i doubt theyre torn. i pulled the rail out today with the injectors in them still and they looked fine.

[gaehrings13]

Hmmmm..... damn the only thing I could think would be you have a vacumm leak like you said, well I tried lol. I hope you get it running soon.

[Frankenstien93]

the idle deal sounds like a vacuum leak to me i just tested that one my car which i was having the same problem. I found a huge leak around the EGR block off plate so i have to take the intake off and RTV the seal see if that helps.

[j-z]

OK i just now thought of this... would having the dizzy one tooth off cause a bad idle and rich conditions? ive been thinking about it in my lazy boy for the past hour while watching overhaulin', and that one tooth off deal seems like it would cause the problems im having. its close enough to fire up and run only if i keep my foot on the throttle to keep it from dying, and the whole time im doing that its running rich. can someone comment on this? reason why is because when i was installing the dizzy the FSM is kinda misleading in alot of areas while i was doing my build up. it shows to have the dots all lined up in the pic, but the way i put it in only two of them were. thats what leads me to believe what my problem is and my symptoms could possibly be cause by having the dizzy one tooth off. well see friday :crosses fingeres:

[PapaSmurf2k3]

i dont think so man... but im in the same boat as you... literally, same symptoms, everything. my timing is pretty dead on. If you try driving your car does it buck and drive rough and have weird inconsistant accelleration?

[j-z]

i havent even drove it. itll straight up cut off if i let my foot off the throttle.

[PapaSmurf2k3]

well... this is how i timed my car (because your supposed to time it once its fully warmed up... but if it doesnt run... its kinda hard to get there):first off... this is a 2 man job. one person cranks her over while the other F's with the dizzy and throttle. your get it running, and move the dizzy to where the throttle response and everything seems to be the best. if this so happens to be as far over as the dizzy will go, you may be off a tooth, and have to remove it and install it again, 1 tooth over and repeat the process. let me know how it turns out.

[jr_ss]

If you are unsure of the timing, put the crank at TDC and reinstall the dizzy. The dot closest to the gear teeth and the slot in the dizzy shaft should be aligned. Besides doing this will save you a headache and you'll also be making sure your work is right.

1 tooth off is roughly 15 degrees of timing give or take a few, so you could be so far out of wack that, that's the only reason it'll idle with the pedal mashed. Check it and come back with the findings..

[j-z]

If you are unsure of the timing, put the crank at TDC and reinstall the dizzy. The dot closest to the gear teeth and the slot in the dizzy shaft should be aligned. Besides doing this will save you a headache and you'll also be making sure your work is right.

1 tooth off is roughly 15 degrees of timing give or take a few, so you could be so far out of wack that, that's the only reason it'll idle with the pedal mashed. Check it and come back with the findings..

exactly my thoughts. ill def be taking a look at it tomorrow. the more and more i think i about it the more i tell myself this HAS to be whats wrong. thanks bros and ill def post up tomorrow whether or not whats up.