again for reference this is on my 93 3.1 cavalier:
well after removing the plenum, tb, etc. and knowing for sure that there are no vac. leaks. the car continues to run like shit. cutting out and killing the engine as soon as you press the gas and having it buck while driving. the only way to move is to hold the gas a little and put it in gear, very rough idle, when i mash it down it doesn't rev limit, but couldn't go much higher than 3 grand also a dead spot while initialy depressing the gas at any kind of driving. so i got another chip, pretty much the same shit.
NOW here's the kicker i put the stock memcal and hyperchip back in. the car runs like it should, smooth idle, very minor bucking probs. no cutout or dead spot at all while initialy depressing the gas. the only thing it does is sometimes dies when depressing the break. not stalling out, but just instantly shutsoff and it also does this EVERY time when placing it nuetrul while driving.
i would think plugs, wires, coils, vac leaks. that kind of route. but that's just it. the car runs fine with the stock chip. ALL WITH 30# INJECTORS!!!
I'm at a loss.
you're using 30lb injectors in a NA 3.1???
LMFAO!!! no this is going to be for a turbo setup.
so it's turbo'd then? if not, what injectors are you using?
well if ur running those big ass injectors and its not turboed yet (wich is what it sounds like your saying) it will run reallly shitty
yeah, everything's there, just can't hook the acuator up until i get the tranny rebuilt to handle the power and a larger exhaust. it will still run shitty even though the code is for 30# injectors???
You can run 50-60 lbs injectors if you want with or without a turbo and it does not matter...unless you have not tuned for that size injector. All you need to change is the fuel mapping and pulse width and it will be fine.
Hyperchips does not know SHIT ALL TO ANYTHING about the LG5. I have seen a couple of their "tunes" and they are so rediculous in settings it cracks me up!
If you have a stock cross-over it needs to be rebuilt, replace ALL sensors, and tune the chip.
Do you have a laptop that you can datalog with TunerPro RT?
i have a laptop, but never datalogged before. that's what i don't understand that hypertech is basically a stock chip and it works perfectly except it does one thing and that is cutout when braking and in neutral. but the idle is good and no cutout on accelerating and no bucking/jerking while letting off the gas while driving. the crossover is good and i have diff. chips that are modified tgp code for 30# injectors, that's what i can't figure. i also have the 2bar map installed and larger fuel pump.
^^^^also don't have a scanner and nobody seems to have 1st gen. maybe a bad egr? i've been letting the car warm up, i then notice after driving for a while, smoke starts pouring out the driver's side hood crevise. pop open the hood and it seems to be coming from around that general direction but its always too hot to take things off to inspect and thats the only time it does it.
What cross-over do you have? Do not tell me it is fine...do you have a Jeff M or a stock built or one you redid?
it's a redid stock unit. i've had a couple people look it over and there's no leaks. besides there were no probs with the 24# injectors and the stock chip.
Then your chip is not set properly to handle the larger injectors. Your lower timing tables and timing for fuel decel may be off as well as the decel fuel enrichment as you are slowing.
Have any of your friends driven behind you when you are slowing down? Do they say there is black smoke from the tailpipes or when you restart is there a cloud of black smoke as soon as it starts?
If you want my help I will need some honest input from you if we are going to get things straightened up. Do not guess at an answer. If you do not know the answer truly do not guess or just agree. I hate that crap because it takes 100x longer than it should if the facts are lined out on the table. I am not trying to sound like a prick or if you have not told me straight answers...but putting it on the table to try and get you helped. ;)
I am tied up alot at the shop and my answers may be far and few between but we will get you straightened up. If you are looking for a speedy answer that will get you working for sure also...talk to Invasion1 (Dave)!
don't know where you're getting that info from, but i'm here to give you everything that i know at this point. believe me i'm tired of messing with this and want it taken care of and will help in any way i can. as far as checking the exhaust out i will and try that and let you know.
I made him a chip Kenny but after all that i just tried to read here im not sure what the car has on it.... :icon_neutral:
I made a chip that should be close to what he needs but i needed more info to get the fuel tables set better so its a work in progress i thought.
so i dunno where it stands now......one_fast_prix is this my chip? and that list of mods you gave me that it has are ALL those currently on the car?? Turbo, Injectors etc etc.
I made you a chip that was for all of those variables and if your missing one or more it ain't gonna work :icon_rolleyes:
YES, there are 30# injectors that are installed in the car. AND YES the turbo is installed but the accuator is not connected so i'm not boosted right now. after the shit i've been going through i don't know how to figure out the culpret. i think at this point the way to go is get another set of stock injectors and go from there with the stock memcal and make sure something hasn't quit working in the middle of things.
well just ran the code and got 45:
Rich exhaust Check for a sticking M/C solenoid. Check wiring at M/C solenoid connector. Check the evaporative charcoal canister and its components for the presence of fuel. Check for fuel contaminated oil. Check the fuel pressure regulator. Check for a leaking fuel injector. Check for a sticking EGR valve. Replace the oxygen sensor.
what's m/c and anybody have any ideas what i should check first?
can you list all of your mods? is this an all stock TGP engine with 30lb injectors or what? i'm kind of wondering why you put the 30lb injectors in...
Bad 02 sensor or connection. Probably too much fuel and it is flogging the 02 sensor with fuel.
well bear with me on this one. alot of ppl are getting confused:
it's a 3.1 n/a with larger injectors and has the code in the custom chip to handle the larger injectors. turbo setup is installed but the acuator is disconnected so i'm not running boost at the moment until i get the tranny rebuilt to handle the power and larger exhaust done. this is on a 3.1 cavalier and has a larger fuel pump and 2bar map installed.
is there anyway to look at the o2 sensor and see if it's bad. like covered in carbon or replace it?
i think the 30lb injectors are your problem. probably too much fuel with stock fuel pressure. there is really no reason for them to be in there at this point. i'd go back to stock TGP chip and injectors for now.
as for O2 sensor...do you have an A/F gauge? that will tell you if it's working. or you can put a digital multimeter on it.
don't have the a/f hooked up yet. i can test it with my multimeter, what kind of readings should i be getting?
Got me clueless. I just replace them if I think they are giving me crappy or irratic numbers when logging. The Bosch ones are the cheapest but it will not last long on our setup. Too much heat maybe.
I buy the GM ones from the dealer and they work the best and longest. THERE IS NO DIFFERENCE BETWEEN THE BLACK OR PURPLE WIRED 02 SENSORS! NONE ZERO ZILCH ZIPPO! I have run both and tested both...no difference.
GM ones are made by NGK
Quote from: one_fast_prix on October 01, 2006, 03:31:31 PM
don't have the a/f hooked up yet. i can test it with my multimeter, what kind of readings should i be getting?
you should see the voltage rapidly swing up and down between 0 and 1 volt when (if) the engine goes into closed loop.
http://auto.howstuffworks.com/framed.htm?parent=question257.htm&url=http://www.forparts.com/o-21.htm