Help a brother out???
Thread Starter
8 second mod
iTrader: (37)
Joined: Nov 2002
Posts: 17,879
Likes: 1
From: East Side Performance! mASShole
Help a brother out??? I have a problem, rev it up snap the clutch, the car lifts, then falls flat on its face for about 150 feet, then pulls back up, and still managed 30 mph in the back half. I raced friday and landed a whooping 2.1 60' with the car totaly dead under me, 96 in the 1/8 and 126 in the 1/4. the car was just stumbling over itself.
Filters clean, new fuel pump going in asap, lines are free, and injectors just redone.
any input?
Filters clean, new fuel pump going in asap, lines are free, and injectors just redone.
any input?
Thread Starter
8 second mod
iTrader: (37)
Joined: Nov 2002
Posts: 17,879
Likes: 1
From: East Side Performance! mASShole
That is the one thing i havent done, im waiting for my new one to come in. But for some reason i think it is more then that.
But once it is in i will keep my fingers crossed and hope it works!
But once it is in i will keep my fingers crossed and hope it works!
Are you watching the A/F?? On my Supra this happens also when the car has a rich spot, then as boost comes in and leans out, the car hits hard. You may want to check the A/F at that dead spot and see where its at.
Jose
Jose
Originally Posted by JZ 97 SS 1500
Are you watching the A/F?? On my Supra this happens also when the car has a rich spot, then as boost comes in and leans out, the car hits hard. You may want to check the A/F at that dead spot and see where its at.
Jose
Jose
-Geoff
If it is not the TPS then JZ 97 SS 1500 is probably right. My car was doing the exact same thing as yours and after I got the WB hooked up it showed my A/F was dropping to 9.2:1 when the TPS would first hit 100% and when the motor would get into boost it would lean out and take off like a bat out of hell. I leaned out the PE/RPM table in the areas that were rich prior to boost and it now runs great.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Thread Starter
8 second mod
iTrader: (37)
Joined: Nov 2002
Posts: 17,879
Likes: 1
From: East Side Performance! mASShole
I tried the tps, but my fuel pump is out so i havent tried it yet. Im thinking that is my problem, it feels like it is either dumping to much fuel or no fuel. so im starting there.
we shall see soon.
Im also thinking the car might need a better street tune.
we shall see soon.
Im also thinking the car might need a better street tune.
A big stumble like that usually means its rich or you have no timing, you have to make sure your PE tables are close at lower rpm beacuse with a 3.73 your rpm is going to drop a whole bunch on a launch if the car hooks up. If you try to delay the PE the car will be way too lean since its the PCM's job to keep the car ay 14.7:1 until it goes into PE. If you have a dead O2 that could cause it to run rich or lean on one bank also.
It could be a lot of other electrical problems, grounds, pinched/burned wiring etc. You really need to log a couple passes and it would be nice t have a wideband in the car. Trying to diagnose a problem like that over the internet is tough, you need a little more data.
It could be a lot of other electrical problems, grounds, pinched/burned wiring etc. You really need to log a couple passes and it would be nice t have a wideband in the car. Trying to diagnose a problem like that over the internet is tough, you need a little more data.
Thread Starter
8 second mod
iTrader: (37)
Joined: Nov 2002
Posts: 17,879
Likes: 1
From: East Side Performance! mASShole
Ive gone threw all my grounds, i have checked all wiring, ive replaced plugs, wires, sensors, fuel injectors cleaned, bla bla bla.. It is getting to the point of MURDER!!!! im getting fed up with it.
I do believe however this new problem is rich/lean thing.
my o2's are shut down and have been for some time now, most of last year as well.
but i think once i get my new pump in and the car running again i need a better street tune.
What is the easiest, cheppest, best wide band to put in the car??
I do believe however this new problem is rich/lean thing.
my o2's are shut down and have been for some time now, most of last year as well.
but i think once i get my new pump in and the car running again i need a better street tune.
What is the easiest, cheppest, best wide band to put in the car??
plxdeices.com is one, the m-300 is fairly cheap and self contained if you dont need data logging. http://www.innovatemotorsports.com/lm1.php is another. I use a techedge 2.0a but it gets a little pricey unless you build it yourself but it has a built in logger and RPM inputs.
Lot of choices out there..
Lot of choices out there..
Last edited by kp; May 4, 2004 at 08:25 AM.
I use mine most of the time going through the a/c pressure sensor and using efilive so I really dont need the rpm and seperate inputs this techedge has. If you dont have atap or efilive the plx with the wireless data logger (if you have a laptop) looks pretty cool..
If you dont have a laptop the m300 will work. Remember its hard to look at at the track while you are trying to drive sometimes but the m-300 has 0-1 and 0-5v outputs so you can use it with efilive down the road if you want to. The innovative one looks ok but the plx looks a little easier to mount/set up but it has an internal logger so you can download it to your home computer.
There are others, FJO is nice but a little more pricey..
Iis a nice thing to have in the car, you dont have to guess what your a/f is..
There are others, FJO is nice but a little more pricey..
Iis a nice thing to have in the car, you dont have to guess what your a/f is..
TECH Fanatic
Joined: Dec 2001
Posts: 1,220
Likes: 0
From: Germantown, MD
Just out of curiousity, how does something like that install? Having no rear O2s anymore, would I have to remove the front O2 from one bank and install the wideband O2? If so, wouldn't that through the stock PCM for a loop causing it to mess up the AFR?
Mike
Mike
If you dont have cats just put it in the rear o2 bung if you have rear bungs - if not it only costs a few bucks to put a bung in. Some of them have a narrowband output and you can replace one of your front O2s with it and it will supply the pcm with a usable signal (need to wire it up yourself). I find it easiest to use it standalone since I put mine in other cars to tune them once in a while..
Thread Starter
8 second mod
iTrader: (37)
Joined: Nov 2002
Posts: 17,879
Likes: 1
From: East Side Performance! mASShole
OK, so i dont need anything inorder to run the 300 one? i have no a-tap, efi,labtop, nothing. my tuner (aka NOGO) has it all, but hes about 2 hours from me so i need something fool proof. i never got labtop/a-tap do to the fact i couldnt figure it out, im no computer guy Thanks for the imput.
Scott, mine is BAD, yours is only a quick thing, mines forever.
im getting close tho
Scott, mine is BAD, yours is only a quick thing, mines forever.
im getting close tho