got a problem with my ca18det in my 510 (Video)

[ca18det510]

MY AIR/FUEL RATIO IS ON CRACK!








WHAT THE f***, i dont know if its injectors, maf (stock), coils, plugs......?

[ca18det510]

cmon guys help me out!!

[r34 gtr]

Get 12v to that oxygen sensor, man! Do it now!! Get to the choppa!!

[boost_boy]

Your AFM is waaaaay too close to the turbo's inlet housing. Moving it further away will bring daylight over your grim whip

[s13drifter88]

find the voltage problem to the O2 sensore and move the maf atleast 14 inches away from the turbo. turbulence will whack a maf reading. as far as O2 voltages 500mv is ideally stoichometric (i hope i spelled that right). below 500mv is getting leaner and higher is getting richer. fix those 2 issues then hit us back

[ca18det510]

i threw on a longer pipe between the AFM and the turbo and that solved the stalling issue, so now its just the high idle problem. but would a o2 cause a high idle?? when i unplug the AAC it goes right to 800-900rpms, then when i plug it in it jumps up to 1500rpm.

isnt the o2 sensor and the AAC on the same circuit? the brown wire thats what it says in the fsm wiring diagram. so could that wire be f'n everything up because its not getting enough voltage??

btw here a pic of my ride just after fitting everything back on

[s13drifter88]

its prob stuck open or something. mine did the same thing on my ca till i took it apart and cleaned it. problem solved

[ca18det510]

its prob stuck open or something. mine did the same thing on my ca till i took it apart and cleaned it. problem solved

thats what i thought too so i took it apart and cleaned it, but it didnt solve it.

[ca18det510]

is it possible to run it with out the AAC plugged in?? since i am not running any engine accessories.. or will having it unplugged cause it to not run correctly?

[s13drifter88]

it wont hurt. youll just have use the set screw at the throttle body to adjust ur idle. it wont idle perfect tho coz if u adjust for say 800, it may be a little higher when cooler and lower when hot since the computer will no longer have any control over the idle. highest mine idles is about 950-1k when its cool and about 650-700 when hot. i set my idle to about 800

[ca18det510]

ok sounds good, but since it is on the same circuit as the o2 sensor will that mean that the o2 sensor signal wont make it to the computer??

[s13drifter88]

idk about them being on the same circuit, ill take ur word tho. i dont have a diagram in front of me but they may be on the same power circuit as far as 12 volt supply but the signal wire from the o2 sensor will be independent to the computer. after fixing ur maf problems it should have resolved the condition but if not u may have a bad o2 sensor. get a solid 12 volts to the o2 sensor tho before u go replacing it. that may solve ur issue

[ca18det510]

i think its on the same 12v circuit but yea i still need to figure out how to get 12v to the o2. but right now i think my MAF went out, because after driving it, it just all of a sudden started running like s*** and would barely rev up and have no power at all and would spit and sputter and dump white or blue smoke out i cant tell. so im pretty sure its the MAF because when i unplug it, it will run better but still idle a little rough but will be able to rev up a smoother until 2k like it should.

[ca18det510]

video of the NEW problem! when its spitting and sputtering, that is when i just have the throttle about 1/3 open.

[s13drifter88]

OMG! mine did the EXACT same thing. i replaced mine with an N60 but i also have an apexi safc to calibrate it in. When i did it cleared right up. im not saying go out and get an n60 and an safc but thats the same exact things my car did... ieven had the same symptoms, id unplug it and it would idle fine. u should consider replacing it with a larger maf tho coz they will "peg" or max out relatively quickly. N60 is good to around 300-310. N62 is good for over 450+. the maf calibration for N60 is 2in 7out and 4in 7out for N62

[ca18det510]

really?? i was thinking of getting a safc for tuning it. so a n60 Maf? is out of what car? is that the one out of the z32?

[boost_boy]

Nissan maxima 1989-94. You have some electrical problems my friend. Your car runs without the AFM because of other components the ecu uses to run the engine. Your afm is fine, but again, there's something else the matter with your lump. Check the codes on the ecu after you've run the engine for a while and let us know what you find. I know what the problem is, but I'm not there to totally confirm it.

[s13drifter88]

not questioning you since obviously u own more ca's than i do and have more experience but do u not think with the drastic change in idle with it plugged up vs unplugged could point to the maf. mine did the exact same thing as if that was my own ca in his video. i had an n60 laying around and i wired it in with the safc and cal'd in the maf and that fixed it. the n60 is the blue label from the early 90's maxima. i didnt kno they came from late 80's but i believe boost_boy. the n62 is the 300zx twin turbo maf. its an orange label

[ca18det510]

boost_boy, this is the wiring diagram i followed, and it ran perfect besides the high idle,but its this wiring diagram plus the thick blue/red wire and the air regulator being with the fuel pump relay.



is there anything that i missed??? i mean i am down to get a bigger maf and safc because either way it should run better right? but if u know why it is running rich please tell me, its making my garage floor black haha

[s13drifter88]

if u have the maf and the safc my recomendations is try it. if u already have it why not right? not saying its the 100% fix for everyone out there but theres no difference in what ur car is doing anmd what my car did. i dont exactly doubt boost_boy. im just inclined in my belief for 2 reasons. 1) the big change occurs when u unplug it (or plug it in) and 2) it is the same thing my car did. a guy i know who owns a shop told me that it is possible to damage the fillament inside the maf having it to close to the inlet of the turbo.

[ca18det510]

well i got this guy who will sell me his safc-2 for like $150 with everything i need. and i can get a n60 maf for like $20. so should i just try it and see what happens?

[s13drifter88]

i would, hell its exactly what i did

[ca18det510]

dude im still having trouble with my ca18det, and i got the n60 maf and safc, what are your specs set it? i have the sensor set at 2in 7out and 1in 1out, what about the throttle point? whats your Hi-Thrtl and Lo-Thrtl set at? and im getting a knock sensor at around 90! can you tell me what all yours are set at?

edit: but if i have it at 4in 7out it runs much better rpms are smoother, but its like it will run smoother for a couple seconds at idle but then drop to about 700rpm and smoke.. theres gotta be a sensor trippin out somewhere, i checked my o2 sensor again and when i rev it and when it idles smooth, i get a reading of .100-.300 but then when the idles drop it goes down to .000! what is going on!!?!?? i think i need a wideband, but i dont have the money! or an o2 sensor cause mine is acting weird, im gonna replace it.

[s13drifter88]

did u ever get 12 volts to ur O2 sensor?

[ca18det510]

when i check it through the connector it gets 12volts, but when i plug the o2 in and the engine is running, i back probed it and it only reads about 8.5volts... i dont get whats happening. could there be some resistance thats happening?

[s13drifter88]

it could be a bad ground connection in the plug. i had to ground my O2 to the head coz i had no ground through the plug. i dont know why either. i replaced my O2 sensor shortly after tho just for my peace of mind. it was the one that came with the swap anyways so i figured why not

[ca18det510]

yea im still using the same one from the swap too

[ca18det510]

ok now this s*** wont even run, it just keeps cranking and cranking and will get a pop at like the first crank, then nothing, i am getting spark on all 4 spark plugs, and i can hear the injectors clicking but idk if all of them are clicking, is there a way i can hook up 12v to the injector manually? because the spark plugs are soaked with fuel!!! and they are covered in black soot!

and how the hell do u get those damn connectors off without breaking them? ive broken like 3 of them so far s***.

if anyone is in the near San Jose, CA, come on over and help me fix my engine!! i will supply the

edit: wait a sec, i might have it figured out, i took off the o2 sensor and now i have to add (+30%) of correction at idle. so now its running totally lean, and there is like white stuff coming out of the o2 sensor???

[ca18det510]

problem fixed! got a new o2 sensor, and my exhaust built, runs good now but..............

Idles high still, ill kick it down and sometimes it will idle at 600 then jump to 1000, and go between 600 to 1000.
andddd
when i hit full boost my s*** backfires and loses all power, i think its fuel cut, i have the stock maf on there, could i be maxing the maf?

[s13drifter88]

yeah. when i put my t25 from a red top sr on my ca it'd lose all power for a breif second when id hit about 6k. when i put the n60 on with my afc, without making any adjustment other than entering the maf values, it stopped. ive heard the ca maf will peak around 17 or 18 lb a min of air like the ka maf. idk that for a fact but from what was happening i can believe it whole heartedly