car idling bad after upgrades need help

[luv2spedup]

i jst upgraded valve springs, retainers, rocker arm stoppers, cams(HKS 264's) and my turbo. now the car starts but i jst can't get the timing straight. i haven't drivin the car yet but every time gas it up the moter stalls on me. someone even said i need off the market cam sprokets to fix the problem, what can i do need help

[RBSPECIALFIN]

I'd also be intereting inknowing this answer. I have the same set up with a stock turbi and my idle is real low. i haven't messed with the AIV yet i'm think that will solve my problem but it may not. i also had a hard time timiing it.

[luv2spedup]

anyone with any kind of info. im sure quite a few members have gotta have the same or similar set up

[BaliLover]

I just installed a set of 264 step 1s and my car idles low. Thats part of having larger cams. However, if you're dying when you give it gas, I'd guess the timing is off.

With my step 1s, my idle is at around 600rpm, I now only pull 10-12 vacuum instead of 18-20, and I will occasionally stall out when I come to a stop. I'm sure if I played with the IACV I could correct the stalling, but everything else is normal.

[Nicksemianiw]

I've herd with 264's you need to raise your idel to around 1200-1300 for it to idle well. You can do it with the throttle body position. There is no need for the sprokets. And 12 vac is normal for the 264's

[luv2spedup]

thanx guys

[95lstegman]

best bet with big cams and fuel injection (thank you god!) is to lean it out at idle. then you can keep a 700-800rpm idle and have a sick lope without having it feel like it's going to die on you all the time. i seriously don't understand why more people don't chip their own nissans rather than paying $400+ for somebody else to send you an ECU that wasn't even tuned for your car. for that money you could buy your own wideband and datalogging and tune yourself as many times as you like. and a daughterboard isn't much $$$, either.

[luv2spedup]

best bet with big cams and fuel injection (thank you god!) is to lean it out at idle. then you can keep a 700-800rpm idle and have a sick lope without having it feel like it's going to die on you all the time. i seriously don't understand why more people don't chip their own nissans rather than paying $400+ for somebody else to send you an ECU that wasn't even tuned for your car. for that money you could buy your own wideband and datalogging and tune yourself as many times as you like. and a daughterboard isn't much $$$, either.

i'll try that thanx

[95lstegman]

if you need some help email me [email protected] or hit me up on AIM, theantiles.

[luv2spedup]

if you need some help email me [email protected] or hit me up on AIM, theantiles.

thanx man really appreciate the offer, i'll keep that in mind. let me ask u one more thing, is it possible to tune the ecu in a way that would raise the revlometer

[95lstegman]

you can do ANYTHING with a chipped ECU. control injectors WAY better than AFC or the like, you can change the warm-up routine and such, change the way it adds fuel when you dip into the throttle, you can change rev limiters, speed limiters, you can make the knock sensor give more safety when it senses knock, it's really unlimited. just about anything you can think of, you can do.

[luv2spedup]

sweet im gonna have to get in touch with u to help me tune my ecu

[D1 guy]

Ok, when I installed my 256/264 cams in my notchback, I had idle issues...minor ones. It seems like it was out of time as well. I idled it up to about 1200 and took it for a spin. After driving it about 5 times (starting the engine each time) In intervals of about 20 mins, it cleared up. Now the car runs great and I couldnt be happier.

[95lstegman]

i believe that like many ECU's of this era the ECU has a small learning curve. it's not much, but i believe it has some ability to cope with small changes in fuelling and ignition needs. what the factory designed to cope with altitude and temperature changes should be enough to cope with small performance mods. anything like a manifold or cams that change the shape of the torque curve (don't tell me the power and torque curves are different -- power is a FUNCTION of torque) more than just a little will probably need further tuning to run without tripping the knock sensor and to get respectable power from the mods.

[luv2spedup]

well i already bought a fuel computer(map ecu from power house racing) after i install it i can get rid of my mass air flow sensor and other things. i jst wanted to raise the revlometer on my ecu

[95lstegman]

why buy a MAP setup? MAFS isn't bad at all, especially since you can upgrade to a HUGE one for only a little cash. besides, the way the Nissan ECU works it's very easy to tune. in any case, if you're changing out your ECU for one that runs a MAP sensor then you're going to have to figure out how to tune your own ECU. it no longer follows the guidelines of tuning a factory Nissan ECU. sorry for you, buddy.

[luv2spedup]

why buy a MAP setup? MAFS isn't bad at all, especially since you can upgrade to a HUGE one for only a little cash. besides, the way the Nissan ECU works it's very easy to tune. in any case, if you're changing out your ECU for one that runs a MAP sensor then you're going to have to figure out how to tune your own ECU. it no longer follows the guidelines of tuning a factory Nissan ECU. sorry for you, buddy.

but even after i install the map i need to use the factory ecu if u want u can check out their website i believe its powerhouseracing.com they are big with supras

[95lstegman]

i know there are at least 2 systems out there that emulate a MAF signal from a MAP signal, i just don't see the point. they're not cheap, and it just makes the tuning process MUCH more difficult i would think. now you're not getting real information, you're getting information that has been calculated/translated/what-have-you, so who knows how well it will run? i would definitely recommend getting it on a dyno and having some tuning done.

[luv2spedup]

yep that's the only way i would get the car to run rite