fuel injection problem
05-13-2002, 08:10 PM
#1
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Join Date: Jan 2002
Location: Idaho
Posts: 162
fuel injection problem
I've got a 240z with a '83 280z turbo motor in it. I am having big problems with my fuel injection! At full throttle, the motor will not rev over 5000 with only 7 psi of boost. The thing is acting like it is running out of fuel so I hooked up the digital ossciliscope to the fuel injectors and sure enough, it is cutting back the injector on time at 5000 making it not run. It is acting just like a rev limiter. Does anyone have any ideas why it is doing this? Thanks.
-jeremy-
-jeremy-
05-25-2002, 11:13 PM
#2
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Join Date: Jan 2002
Location: Idaho
Posts: 162
Re: fuel injection problem
Boy, this looks like a good post to me with no answers. This is what I was talking about with how bad this site sucks. There should have been a bunch of posts listing the things I should have checked. Well, none of those. For those who wanted to know, I did fix the problem. After I checked every sensor/actuator two times, I looked at the computer. The terminals on the ECC were corroded. With a little bit of scraping, the car ran better, idled better and took five seconds off of my quarter mile time. Thanks for all the help I didn't get.
-jeremy-
-jeremy-
05-26-2002, 06:47 AM
#4
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Posts: n/a
Re: fuel injection problem
Man shut the [censored] up and stop wasting space on the message board ... i just saw ur post and was gonna suggest checking voltages at the injectors and ecu + conenctions (btw u didnt even say what ems u where using) but since ur an impatient [fellow awesome z'er] u dont deserve any replies anyway.
[Moderator's note--let's keep the language G-rated, please!]<P ID="edit"><FONT class="small"><EM>Edited by stev240z on 05/26/02 10:13 PM.</EM></FONT></P>
[Moderator's note--let's keep the language G-rated, please!]<P ID="edit"><FONT class="small"><EM>Edited by stev240z on 05/26/02 10:13 PM.</EM></FONT></P>
05-26-2002, 06:58 AM
#5
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Re: fuel injection problem
And also, we are not your personal mechanics or help line ..... the people on zdriver are other ENTHUSIESTS .... if u look in the dictionary the definition does not say that we are all mechanics that know every single thing there is to know about the zed car... if u dont want people's helpful hints or oppinions and just going to waste space with stupid whining responses, i hope you will bugger off too!
05-26-2002, 03:06 PM
#6
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Join Date: Jan 2002
Location: Idaho
Posts: 162
Re: fuel injection problem
Hey man, I am not the one throwing around insults. I was just sticking up for the guy why wasn't happy with this site. I still love this site and check it everyday. More time here should be spent talking about cars though, so lay off.
-jeremy-
-jeremy-
05-26-2002, 03:09 PM
#7
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Posts: n/a
Re: fuel injection problem
you want replies? what if we dont know? next time we will all waste your time and say "i dont know. good luck"
SoCalZ Prez
http://www.socalz.org
SoCalZ Prez
http://www.socalz.org
05-27-2002, 09:25 PM
#10
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Re: fuel injection problem
Hey--no problem... your apology is much appreciated.
I take it to the heart too when someone says this site sucks, its mainly the same 2-3 people..
I hope that these people will either realize not every question can be answered, and when it is it should be appreciated, not expected. Nobody here has any obligation to answer anybody's questions.
I hope that when I ask a question, it gets answered. If not, I figure nobody knows the answer and I figure it out and when another comes across the problem, I will give advice.
It actually, believe it or not, makes me feel good for asking a good question. and I'm not the only one who doesn't know the answer! I also post on IZCC and its either here or there where I find my answers.
I prefer this setup, but honestly, there are more knowledgable people on IZCC. There are more COOL people here tho
)
-Steve
http://www.geocities.com/stev240z
I take it to the heart too when someone says this site sucks, its mainly the same 2-3 people..
I hope that these people will either realize not every question can be answered, and when it is it should be appreciated, not expected. Nobody here has any obligation to answer anybody's questions.
I hope that when I ask a question, it gets answered. If not, I figure nobody knows the answer and I figure it out and when another comes across the problem, I will give advice.
It actually, believe it or not, makes me feel good for asking a good question. and I'm not the only one who doesn't know the answer! I also post on IZCC and its either here or there where I find my answers.
I prefer this setup, but honestly, there are more knowledgable people on IZCC. There are more COOL people here tho
)-Steve
http://www.geocities.com/stev240z
05-27-2002, 09:37 PM
#11
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Join Date: Jan 2002
Location: Idaho
Posts: 162
Re: fuel injection problem
Hey guys, don't forget that I am a fellow z enthusiast too. I love z cars just as much as everyone else here. Isn't that what the point of this whole site is? What I said wasn't a personal attack on anyone so give it a break.
-jeremy-
-jeremy-
05-27-2002, 09:48 PM
#12
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Re: fuel injection problem
I think we all know its not an attack on anyone peronally but we are the people who make up zdriver.com and you are saying the site sucks based on the people who make up zdriver.com. I don't think you mean it sucks because the layout is bad or inefficient or the site is horribly slow, are you? Stop saying the site sucks this will all be over! Don't attack anyone, please.
-Steve
http://www.geocities.com/stev240z
-Steve
http://www.geocities.com/stev240z
05-30-2002, 10:21 PM
#13
Externally Wastegated
Join Date: Oct 2001
Location: San Diego
Posts: 1,220
Re: fuel injection problem
I'm not an expert with cars, but when I looked at your profile, and didn't see any ignition mods, so I'm wondering if you are still running the stock ignition (coil and wires). That maybe the reason that your car is cutting out. Not enough spark power or maybe the gap is too wide on the plugs for the voltage to make the jump. If the fuel injectors are still the stock 260cc or so injectors, they might be at 85 % duty cycle whereas they will be maxed out and you'll need to upgrade to larger fuel injectors to flow, not mention a higher flowing fuel pump and filter. Z32 fuel stuff seems to work good. I personally haven't done that yet, but will after I upgrade my turbocharger to a t3/t4. I'm also in the process of changing my ignition from an MSD coil only (due to smog inspection) back to a Crane ignition box and coil. I hope this can give you some help. Good luck and happy boosting.
82ZXT
82ZXT
05-31-2002, 02:48 PM
#14
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Join Date: Jan 2002
Location: Idaho
Posts: 162
Re: fuel injection problem
The problem has totally gone away after I cleaned the terminals on my computer. I did think of ignition cutting out, but ruled that out after I hooked up a scope to the coil on secondary side. It wasn't running out of spark, just fuel. Must have not been able to fire the injectors very well going through the corrosion in the computer.
-jeremy-
-jeremy-
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