hornepirate

iTrader: (23)

Alright well im using a 4th gen lower and rail a 5th gen TB and IACV with coolant bypassed to the TB

the car starts up fine but idles from 1500 for about 15 seconds then jumps between 1500 and 2000-2500 rpms i have the uim bolted down nice and tight...i might try to pick up a new gasket and try that. i have not calibrated the TPS yet or adjusted the idle screw.

also no codes are being thrown.

video link: http://www.youtube.com/watch?v=yQigOjHXan4

my original thread http://forums.maxima.org/showthread....64#post7553064

MaximaSpd85

iTrader: (14)

probably the iacv plug not making good contact. either that, or ive once heard something about bypassing the tb not being a good idea cuz the coolant does something with the idle. but id recheck the iacv plug

hornepirate

iTrader: (23)

think the coolant not running through the TB would cause the sparatic idle problem? ill check the iacv plug again tomorrow. I wasnt getting any codes for the iacv like i was yesterday though

hornepirate

iTrader: (23)

i just adjusted the tps to where it read about 5 volts and it helped a bit but then adjusted the throttle cable and it just increased my rpms to 3000 and stayed steady at 3k

shadyonedeath

iTrader: (10)

Our models dont respond to the 5th gen IACV, its all bull****. Maybe someone got lucky and fooled the iacv into behaving like a 4th gen IACV, but overall, its not going to work "properly".

Read the manuals, they have different resistance readings.


This happened to me too, it would idle fine for a few seconds and then start reving on its own.

mightyMax95

iTrader: (5)

the tb bypass issue is the Fast Idle Cam. it hold the tb open EVER so slightly to increase idle during warm up.
-loosen the little nut on the screw below the butterfly pulley
-turn the screw clockwise nearly all the way (just far enough that there's no contact between it and the cam behind it)
-re-tighten the nut

hornepirate

iTrader: (23)

well there are plenty of members who run every set up so i dont think the IACV should matter as long as you have it plugged in correctly which i do, Its working better than it was when i got it started up the first time.

Ill try adjusting the idle stop screw and report back in a couple hours...i have to tear everything down and fix a coolant leak behind the manifold...

hornepirate

iTrader: (23)

Alright im about to give up on this swap...

I pulled the upper (00vi) off the so i could put a new gasket on it and got everything bolted down all again and now...the car wont even start!!! I start it and it revs to about 1100rpms like its gonna start then it dies. and i got a backfire through the intake!!!

i need help

shadyonedeath

iTrader: (10)

....well, go through the steps and see if theres something you missed. Probably missed a vacuum source.

hornepirate

iTrader: (23)

will that alone cause the car to start then die?

hornepirate

iTrader: (23)

the only thing i did when i replaced the upper manifold gasket was bend this down out of the way a little bit more and i notice i cracked a vacuum line...picked up a new one and replaced it but car still only cranked started for a minute then died

shadyonedeath

iTrader: (10)

your cars dying because your 5th gen IACV is useless. Quit arguing with me, i'm a 00vi god.

Put your 4th gen IACV and watch magic happen.


Check:
brake booster
EGR port
PVC
make sure your maf has suction, check if filter is sealed

hornepirate

iTrader: (23)

ill check all that stuff in the morning and go from there...

If all else fails ill be putting it all back to stock...

shadyonedeath

iTrader: (10)

I bet you if you reset your ECU, it will idle fine, but like before, rev up on its own.

Then after 30 min of driving, it will start stalling on you.


Why go stock? Just put the damn 4th gen iacv.

hornepirate

iTrader: (23)

but i need it running by this weend so to use the 4th gen stock iacv id have to put back on the USIM

G3Nis

iTrader: (8)

I have a 2000 and something similar started happening recently. When I cold start, it revs higher than it used too and then if I drive it for a while, when I put it in neutral or a long downshift (5th to 2nd and coming to a stop), it will stall. Do you think it is the IACV as the most likely cause? Do these tend to go bad? I know there are a bunch of possibilities, but the problem seems the same as pirate's.

MaximaSpd85

iTrader: (14)

ok, heres the thing. i assume you think you maybe had a vacuum leak before, hence the reason u put a new gasket on? that may be why it was idling crazy yesterday. today, now that you fixed the vacuum leak, it wont idle b/c of the 5th gen iacv. NOT because it doesnt work, its just not made for our 4th gens. Ive NEVER had an issue with the 5th gen iacv as long as its plugged in snugly (ive done a handful of 00vi and dek swaps). At the same time, ive NEVER been able to do a 00vi swap, or dek swap, without having to raise the idle by adjusting the screw on the throttle body. Its like a must. Turn that screw a little to crack the throttle body open, and voila. i think youll be ok.

hornepirate

iTrader: (23)

im gonna give it one more shot tomorrow before i start piecing things back together... we'll see ill post up another video tomorrow

hornepirate

iTrader: (23)

didnt get a chance to post up a video but found why it shut off after start up...i had a massive vac leak in the TB

Car starts with and without the TPS plugged in... with it plugged in it revs on its own up to almost 4k i hope this means i just need to calibrate it

without the TPS plugged in it starts at about 2000rpm then slowly drops to about 1200rpm then starts revving up.

smx2

[quote=MaximaSpd85;7555300]ok, heres the thing. i assume you think you maybe had a vacuum leak before, hence the reason u put a new gasket on? that may be why it was idling crazy yesterday. today, now that you fixed the vacuum leak, it wont idle b/c of the 5th gen iacv. NOT because it doesnt work, its just not made for our 4th gens. Ive NEVER had an issue with the 5th gen iacv as long as its plugged in snugly (ive done a handful of 00vi and dek swaps). At the same time, ive NEVER been able to do a 00vi swap, or dek swap, without having to raise the idle by adjusting the screw on the throttle body. Its like a must. Turn that screw a little to crack the throttle body open, and voila. i think youll be ok.[/quote

I am wanting to do an install using a 5thG IACV, looks like heaps of people have tried but have to go down the adapter and 4g IACV, and shadyonedeath mentions that the resistances are different, and hence that is why there could be so many isues when 5G IACV with what the 4g is designed to use. However, MaximaSpd85 are you saying that you can get the 5g IACV to work and your 00vi installs run sweet, just by adjusting this TB screw, until it just cracks the throttle body open AND ensure that the plug is snug, and assuming no other vacume leaks then all is sweet using a 5g IACV? Do your installs also have the TB coolant by pass? Also after a length of time do your installs still have no stalling, idle and reving issues at all?

jholley

iTrader: (13)

[quote=smx2;7892506]He got that idling issue fixed by using the 4th gen IACV with an adapter plate:

http://forums.maxima.org/all-motor/6...vi-swap-3.html

I just received my IACV adapter plate in the mail yesterday. I baught a new 4th gen IACV last summer. They're redeisgned and take up less space than the originals so I'm sticking with it when I install my 00VI.

hornepirate

iTrader: (23)

Yupp 00vi has been running great for over a month now with no idle issues but i had to adjust the idle via tb set screw and iacv dial

mista0406

iTrader: (22)

just curious... what did you set it too? where around is the the car idleing at during first start up and where is it settling at during a red light or stop sign during a while driving?

hornepirate

iTrader: (23)

idk exactly how to telly ou how i set it...i just listened to the engine idle and adjusted both a little at a time til it was in the correct rpm range

first thing after sitting all night it idles at 900-950 rpm
after a warm up cycle it idles about 1000-1100 in Park

in D it idles about 700-725

and at a stop comes exactly to 700

OEM range is between 700-750 or 800 for autos and 650-750 for manuals i believe