DraginX

Before I start I know this would be better suited for the tuning section, but I feel this section gets better response and more activity. So if it needs to be moved feel free.
I had my car tuned earlier this summer then put a fully built bottom end in. The head is the same, was just decked the bare minimium. Old bottom end was a stock b16, new is a built sleeved gsr. Only real difference I can think of is I'm running a fluidampr race pulley.
So the car starts and idles the same as it did before, but as soon as I give the throttle a little blip it falls flat on it's face, if I ease very slowly into the throttle it will rev up.
I've been doing alot of searching and came across talk about the injector battery offset table, could this be the problem because of the race pulley? If so what is the best way to set it up. I am on an AEM EMS.
Only other thing I can think of is I have an injector issue.

josh green

TPS could have taken a dump, experienced that one 1st hand before. Just a thought.

HotWheelz

in the "tuning window" in your selected channels look for tps value, if your not sure you can calibrate it in the wizzard, or through "tps options" and "tps channel" this will tell you all you need to know about this...

injector dead times or "voltage offsets" aren't that critical unless your reving below 850rpm with a tune that's seriously off or running incredibly large injectors. your base ignition is sufficient to keep the motor motor running if your AF over 10 or even 11 af's despite a large vaccum change.... this isn't simple internet question/answer... record, and upload your cal, datalog while recording this "blip" any knoledgeable "tuner" can load it up in aemlog and clearly see what's going on and fix it for you....


too bad i'm 10 miles away i'd like to help you out...

0xenocron

You changed to a bottom end of different stroke, compression and probably bore size and you think the pulley is the issue?

It needs a retune...

phaphon

shouldnt you need a retuned ? going from a stock b16 to a built gsr is a big difference

a1320addict

iTrader: (1)

Was the previous motor tuned? Same injectors/fuel? You need a retune regardless, but it 'should' be able to idle and free rev provided you haven't changed injectors/fuel/MAP.

Start simple...make sure your TPS and MAP connectors aren't switched, fuel pressure, cam timing, base ign timing, fuel is good, etc.

I wouldn't break the motor in while tryin to diagnose.

Uncle Dave

I have seen this so many times.

locash

I'm with Xenocron on this one, you need a new tune. I'm going to guess that you went from an 81mm bore to an 84mm bore, along with that different stroke. Toss some fuel at it and get it to a tuner..

DraginX

Tps is calibrated. My tps is from nissan and my map sensor is aem so the plugs can no longer be switched so that is out.
Ive tried adding fuel and it doesnt seem to change anything at all. Still stumbles and falls on its face. It is going to my tuner for a retune. But i just want to make sure i can atleast drive it there. Ill try adding even more fuel and if that doesnt work I'll just haul the car there. Thanks for the input guys.

scottdh20

you need a retune regaurdless of the issue you are having....and i wouldn't count out mechanical timing either(iirc 1 tooth advanced it pulls great and hits like a 3500rpm limiter, 1 tooth ret. will take forever to get to 3500 and then opens up)

most likely the problem is the tune

Topdawgg

I would think that I would be still be able to idle and he should be able to rev it..

ralph11sec

could be a something else. do you have a wideband installed?

but i feel if everything is working fine, and you swapped your bottom end from 1.6 to 1.8L, you should be able to at least drive the car using the same fuel system and fuel map...

data log and map sensor could be busted...

DraginX

It has a wideband. It is going lean when it falls on its face. But i did add fuel and it didnt do anything. I will add more when i get back home.
To be clear, the car is going for a tune. I just want to make sure there are no issues before i get there. I don't want to show up to find out there are majors issues somewhere and im just wasting my tuners time.

2k.civic.si

goes lean falls on face....you just answered your own problem.

92redhatch

So you put A different bottom end and you think the pulley is your issue? The car needs a retune

DraginX

I was asking if it could be possible because of the voltage loss. I know it needs a retune, again if you missed it, I fully intended on having it retuned but wanted all the minor issues sorted out before getting there.

You may think I answered my own question but I have tried adding fuel, actually a large amount of fuel in the area it goes lean and it does absolutely nothing. It was late and I was tired and forgot to mention that in the first post, I then retried it again when everyone mentioned a retune and still same issue. I'm hauling it to my tuner tomorrow and hoping he can sort it out quickly. But I'm starting to think I'm having injector issues. When I find out the issue I will report back.

mrbsponge

Take it to someone who knows aem and can help you. there is much more in AEM that is going on than just the main fuel graph that could be affecting your car as far as fueling goes.

one big thing I see here is there is no mention of sync'ing the timing from AEM to reference the motor.

a tooth off sync can make a car not run properly.

DraginX

Got it all figured out, you definately were the most help and had the best answer. The AEM wasn't sync'd properly. Thanks for the help.