2.0L LSJ Performance Tech 205hp Supercharged SS tuner version. 200 lb-ft of torque.

large + fuel trims

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Old Jan 28, 2007 | 01:35 PM
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large + fuel trims

so, after days without my car, and the issues im sure u heard about i finally got it running good enoug hto drive it hope today.

so im on the highway and its running like ****, massive lag and hiccups like a beast( we already know its running hella rich). anwyays i turn on my interceptor and just so happen to switch over to long and short trim settings, AND LIKE YOU WOULDNT BELIEVE.. WOT, normal driving, mild throttle, backpressure, breaking, NOTING WOULD MAKE THEM CHANGE!!!!!!!!!!! short trim is stuck and i mean stuck at 32.8 and long trim is at 19.5, this HAS to have something to do with my richness and flooding issues right? like wtf

apparently when your ignition switch is messed it can send faulty signals to the fuel pump but is this the product of that?
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Old Jan 28, 2007 | 02:01 PM
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I wouldn't think the ignition switch would cause that. I would think if it was faulty it would either send or not send the signal to the fuel pump. I don't think it would cause it to dump extra fuel in but you never know with these new cars. Good luck, hope it's not too much of a problem.
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Old Jan 28, 2007 | 03:14 PM
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faulty ignition switches have been known to cause very odd bugs and problems in cars...i could have something to do with it...dont rule it out
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Old Jan 28, 2007 | 07:44 PM
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Why did mattyfinch get banned!?!? WTF is up with all the banning!!??!!??
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Old Jan 28, 2007 | 07:51 PM
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Because he said boosted_ss is a bitch or something like that. Send jony a pm
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Old Jan 28, 2007 | 08:07 PM
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The ignition switch sends a request to the PCM to crank over the engine. If the signal is bad once it will not start and you have to wait 10 mins minimum before trying again, after each time you try it restarts the 10 minute timer. That might have been the problem.

Matty got banned for a reason as the mods will say, even if he called another member a name it was "deserved". However A member did make a thread to ban matty today...so things could have stemmed from that.
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Old Jan 28, 2007 | 08:30 PM
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Sounds like there is something wrong with your injectors maybe one is stuck open?

Why on earth would your ignition switch mess with your fuel trims?

Also with a thread title like this chances are no one is going to look at it because it's not a serious title. Well at least anyone who would have an answer.
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Old Jan 29, 2007 | 12:20 AM
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sounds like bad pcm or stuck 02
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Old Jan 29, 2007 | 12:23 AM
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Stop making posts referring to ban members and the circumstances of the bans.
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Old Jan 29, 2007 | 01:04 AM
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Zinner not to be a smartass but those where there since you posted in here last. Kind of thought you would have gotten em. Oh well. We shall not speak of such events
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Old Feb 1, 2007 | 09:55 PM
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HELP!!!.. fuel trim issues + gay dealer

So, after like 10 days of talking to the saturn dealer i finally had a day off, and got the car to start so i decided to drive up.

Incase you've misssed my adventures ill reca quickly. About 10 days ago i went out in the morning to start my car, only to get some of the most horrific noises you will ever hear, i honestly thought i had somehow seized a piston it was so loud and burpie(best way i can describe it) After many failed attemps to start him, he finally just flooded. I called my brother and had it towed to his shop where they looked at it the following day. The tech 2 and my interceptor were both showing the p0171 and p0300 both miss fire codes, this of course after they dried out the plugs and managed to get him started. So for the last 4-5days ive been pooling resources to figure out what the hell is making my car run like ****, AND I MEAN ****... its literally flooding itself at idle, is wasting tonnes of gas, and just runs like a 1979 civic hatchback with mugen exhaust.(haha) Anyways, the ideas of a dirty maf, dead o2 sensor, faulty injector, and so on were thrown around, and i was sure to make my dealer aware of this today when i got there. Before i left, i decided i would buy some stuff, bkr8eix plugs, and synthetic oil to get it changed,hoping somehow this simple stuff would spell relief, didnt work. After they installed the plugs and did the oil change, we started him up and for like the first minute i have never sen him run smoother then BAM, misfire and misfire, and you can actually hear and feel it in the car its that bad. So we slapped the tech 2 on it again, and again its showing p0171 and p0300, and that bank3 and bank 4 are multi misfiring like banchies... . I mention the o2 and maf pleading to check them, although my o2 sensor is showing voltage on the intercetor, and the maf frequency seems ok.. anyways they refuse, claiming a tsb about p0171 they have as being the culprit.(sp) It says the REFLASH the entire ecm, that its a world wide tsb on this issue and that it will probably solve the problem.... except of course I HAVE A CUSTOM TUNE!!!!!! so they cant until i get somone with hp tuners. now, my question is, will this fix it you think? could it be just a issue like that, but if so, why did it take 53000 kms to happen, and yeah. granted i have seen the p0171 code now and then, but never had it do this. Also, could this contribute to the trims being wacky?

and the highway home, the car showed, 32.8 on the short trim, like stuck on it then would sparatically would drop to -22.6 and bounce back up...then when i let go of the throttle it would sit at 0 and only take the lightest of taps on the pedal to bring it back up to 32.8 ???

also the long trim refuses to move from 19.5 like at wot, idle, cruise, doesnt matter... i seriously dont get it guys, someone help

oh and p.s the service manager is a homo, says he never replaced a maf or o2 on warrenty so if it was the issue id have to pay , he also quoted me 1104 for front brake pads haha, wow.

but yeah, someone help, i know witt and others are good with this so fire away, cause my car wont
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Old Feb 1, 2007 | 10:02 PM
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Originally Posted by mattyfinch
So, after like 10 days of talking to the saturn dealer i finally had a day off, and got the car to start so i decided to drive up.

Incase you've misssed my adventures ill reca quickly. About 10 days ago i went out in the morning to start my car, only to get some of the most horrific noises you will ever hear, i honestly thought i had somehow seized a piston it was so loud and burpie(best way i can describe it) After many failed attemps to start him, he finally just flooded. I called my brother and had it towed to his shop where they looked at it the following day. The tech 2 and my interceptor were both showing the p0171 and p0300 both miss fire codes, this of course after they dried out the plugs and managed to get him started. So for the last 4-5days ive been pooling resources to figure out what the hell is making my car run like ****, AND I MEAN ****... its literally flooding itself at idle, is wasting tonnes of gas, and just runs like a 1979 civic hatchback with mugen exhaust.(haha) Anyways, the ideas of a dirty maf, dead o2 sensor, faulty injector, and so on were thrown around, and i was sure to make my dealer aware of this today when i got there. Before i left, i decided i would buy some stuff, bkr8eix plugs, and synthetic oil to get it changed,hoping somehow this simple stuff would spell relief, didnt work. After they installed the plugs and did the oil change, we started him up and for like the first minute i have never sen him run smoother then BAM, misfire and misfire, and you can actually hear and feel it in the car its that bad. So we slapped the tech 2 on it again, and again its showing p0171 and p0300, and that bank3 and bank 4 are multi misfiring like banchies... . I mention the o2 and maf pleading to check them, although my o2 sensor is showing voltage on the intercetor, and the maf frequency seems ok.. anyways they refuse, claiming a tsb about p0171 they have as being the culprit.(sp) It says the REFLASH the entire ecm, that its a world wide tsb on this issue and that it will probably solve the problem.... except of course I HAVE A CUSTOM TUNE!!!!!! so they cant until i get somone with hp tuners. now, my question is, will this fix it you think? could it be just a issue like that, but if so, why did it take 53000 kms to happen, and yeah. granted i have seen the p0171 code now and then, but never had it do this. Also, could this contribute to the trims being wacky?

and the highway home, the car showed, 32.8 on the short trim, like stuck on it then would sparatically would drop to -22.6 and bounce back up...then when i let go of the throttle it would sit at 0 and only take the lightest of taps on the pedal to bring it back up to 32.8 ???

also the long trim refuses to move from 19.5 like at wot, idle, cruise, doesnt matter... i seriously dont get it guys, someone help

oh and p.s the service manager is a homo, says he never replaced a maf or o2 on warrenty so if it was the issue id have to pay , he also quoted me 1104 for front brake pads haha, wow.

but yeah, someone help, i know witt and others are good with this so fire away, cause my car wont
What mods do u have ?

and are u sure its a lean code and not a rich code.

Last edited by NightriderCobaltSS; Feb 1, 2007 at 10:02 PM. Reason: Automerged Doublepost
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Old Feb 1, 2007 | 10:03 PM
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2.6 60lbs casper harness, intake, magnaflow catback, snow perf meth kit(not running) hp tuned.
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Old Feb 1, 2007 | 10:05 PM
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Originally Posted by mattyfinch
2.6 60lbs casper harness, intake, magnaflow catback, snow perf meth kit(not running) hp tuned.
are u running lean or rich ? "literally flooding itself at idle, is wasting tonnes of gas" is sounds like rich.
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Old Feb 1, 2007 | 10:09 PM
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yea it is rich like hell when both cylinders are constantly misfiring, there is all this unburnt fuel.
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Old Feb 1, 2007 | 10:16 PM
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Originally Posted by mattyfinch
yea it is rich like hell when both cylinders are constantly misfiring, there is all this unburnt fuel.
you and i have similar problems my car is running rich as **** but we think it might be the MAF since i do use a K&N which i am chaning to AEM or changing out the map sensor. and if thats doesnt work i go back to stage 2 tell the dealer sometime is wrong with my car and see of they can find anything.


A code P0172 may mean that one or more of the following has happened:

The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters (K&N, etc.) can cause the MAF to become dirty if the filter is over-oiled
There could be a vacuum leak.
There could be a fuel pressure or delivery problem

Possible solutions include:

Inspect all vacuum and PCV hoses, replace if necessary
Cleanthe MAF sensor. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
Inspect fuel lines for cracks, leaks, or pinches
Check the fuel pressure at the fuel rail
Check the fuel injectors, they may be dirty. Use fuel injector cleaner or get them professionally cleaned/replaced.
Check for an exhaust leak before the first oxygen sensor (this is unlikely to cause the problem, but it is possible)

im not getting any misfires

Last edited by NightriderCobaltSS; Feb 1, 2007 at 10:16 PM. Reason: Automerged Doublepost
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Old Feb 1, 2007 | 10:17 PM
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im going to copy this down and yeah, i hope its the maf, its the only thing i can think that would cause such irratic behavior. But would it explain the misfires?

oh you arent getting any, well **** im getting alot in the 3rd and 4th cylinder, what can cause this, i have new plugs, oil changed, like ****
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Old Feb 1, 2007 | 10:19 PM
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Originally Posted by mattyfinch
im going to copy this down and yeah, i hope its the maf, its the only thing i can think that would cause such irratic behavior. But would it explain the misfires?

oh you arent getting any, well **** im getting alot in the 3rd and 4th cylinder, what can cause this, i have new plugs, oil changed, like ****
PM Sent i wanna talk offline.
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Old Feb 1, 2007 | 10:20 PM
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If you have unburned fuel it is most likely your ignition system. Check the wiring on the harness that goes the spark boots (I think that's what they're called) and the boots themselves to see it they are cracked or damaged in any way. Check to make sure the connector for the spark boot harness is clean and connected properly. I would also remove your MAF from the intake and clean it with MAF or electrical cleaner.
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Old Feb 1, 2007 | 10:20 PM
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replied. but please anyone with suggestions lemme hear em!
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Old Feb 1, 2007 | 10:21 PM
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A positive # on the fuel trim value is "adding fuel", a negative # is taking fuel away. The reprogram the dealer is speaking of will not fix your problem. Short term fuel trim is what is happening now, long term trim you most likely will not see move. P0171 is a lean fuel trim, but also getting a neg # = rich. I would look into a faulty injector first, especially since the are replacements.
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Old Feb 1, 2007 | 10:23 PM
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There is way to test the injectors with some type of electronic light. I can't remember the name off the top of my head though.
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Old Feb 1, 2007 | 10:23 PM
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Have you done a compression test?
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Old Feb 1, 2007 | 10:27 PM
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Originally Posted by NJBLUESS
A positive # on the fuel trim value is "adding fuel", a negative # is taking fuel away. The reprogram the dealer is speaking of will not fix your problem. Short term fuel trim is what is happening now, long term trim you most likely will not see move. P0171 is a lean fuel trim, but also getting a neg # = rich. I would look into a faulty injector first, especially since the are replacements.
how exactly do you test an injector?

Originally Posted by Matty
Have you done a compression test?
no but in theory i would get different codes, and wouldnt be able to drive it, like on the highway cruising it feels normal, minus the 11 mpg haha.

Originally Posted by 2K5SS/SC?
There is way to test the injectors with some type of electronic light. I can't remember the name off the top of my head though.
go into detail haha

Last edited by mattyfinch; Feb 1, 2007 at 10:27 PM. Reason: Automerged Doublepost
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Old Feb 1, 2007 | 10:32 PM
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You have to pull out the injector and use almost like an ohm meter, but it has a light on it. Damn it I cannot remember the name off the top of my head for that damn thing!

It's a NOID light! Finally I found the name of what I am looking for!

Here read this link to test the injectors. Good info.

http://www.asashop.org/autoinc/dec2000/mech.htm

Last edited by 2K5SS/SC?; Feb 1, 2007 at 10:32 PM. Reason: Automerged Doublepost
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