Vortech V9 More info, still the same problem..
Vortech V9 More info, still the same problem.. Okay, took the belt off the supercharger, put stock injectors back iin, took the program out drove to the GM dealership had my friend flash the PCM with the most current file.
the car does the exact same thing it was doing when the supercharger was hooked up! The inline fuel pump is still hooked up. and all the supercharger ducting is still hooked up so the engine is having to pull through the tubing.
still missing on 5, cutting out when accelerating from 50mph or so at ~35% throttle, cutting out a stoplights, almost dies sometimes, acts like it loads up, and when you accelerate from the light it kinda bogs down and acts like it has to "blow" out the overloaded fuel to accelerate properly.... soo... now what? I've got a new set of springs "Z06" springs on the way, thinking of using my friends 98 PCM to see if mine has some sort of problem, it could be wiring still i guess....
here's my autotap file of some normal driving and a couple of WOT runs, my LTFT's go to 0, but then come back up to about 6 halfway through the run, then back down to zero???
http://www.fbodypages.com/efilive/novortech.csv
any more ideas?
the car does the exact same thing it was doing when the supercharger was hooked up! The inline fuel pump is still hooked up. and all the supercharger ducting is still hooked up so the engine is having to pull through the tubing.
still missing on 5, cutting out when accelerating from 50mph or so at ~35% throttle, cutting out a stoplights, almost dies sometimes, acts like it loads up, and when you accelerate from the light it kinda bogs down and acts like it has to "blow" out the overloaded fuel to accelerate properly.... soo... now what? I've got a new set of springs "Z06" springs on the way, thinking of using my friends 98 PCM to see if mine has some sort of problem, it could be wiring still i guess....
here's my autotap file of some normal driving and a couple of WOT runs, my LTFT's go to 0, but then come back up to about 6 halfway through the run, then back down to zero???
http://www.fbodypages.com/efilive/novortech.csv
any more ideas?
TECH Resident
Joined: Aug 2003
Posts: 948
Likes: 0
From: orlando, florida
Your l-trims are way positive cruising you need get the PT richend up by lowering your IFR tables start with that. have you replaced your MAF to see if it`s bad? it`s real hard to interpret the spreed sheet but it looks to me like the maf readings are out of range. Are you reading lb/min or g/sec? My car at WOT only hits 39lb/min or 390 g/sec at 6000rpm at the end of a run. At idle it reads 1.2 lb/min or 9.0 g/sec. your reading are pretty low so to me that means you ether have a MAF elect. problem, bad MAF or a leak after the MAF. check all the wires to the maf very carfully for any breaks or shorts. i had a bad MAF on mine and the symptoms are alot like what you going through.
Last edited by MYTURBOT/A; Jan 23, 2004 at 10:20 PM.
Originally Posted by S_J_H
is the inline pump installed and operating properly?
Do you have a fuel pressure gage?
Do you have a fuel pressure gage?
My maf readings are probably low becasue I'm the engine is still breathing through all the supercharger ducting. so the engine has to pull through the throttlebody>afterooler>supercharger>elbow>maf>air filter.
TECH Resident
Joined: Aug 2003
Posts: 948
Likes: 0
From: orlando, florida
It shouldn`t matter if it`s pulling through 15 feet of plumbing the engine still needs a certin amount of air at idle. Have you tryed a differant MAF? Hook the MAF onto your throttle body like stock see if that helps could be a pluged aftercooler.
Your process of fixing the car is way too random for me, you are never going to get anywhere this way.
You have made the first good step of putting the stock tune back in but I always suggest that people look at the mods they have done and look at how you may have created a problem.
I would be happy to discuss this on the fone with you at some point, you can email me a number, but looking at your mods, I wonder what you mean by cutting out. Did you check the wires that run by #4/#6 header primaries, one of those wires is your starter power wire, another is an 02 wire, and another is the crank wire.
I would highly suggest you work a deal with someone with Autotap and look for anomalies. If you have one bad coil or plug wire it's not doing make the engine die out. I suspect that either you have a dead or inoperable sensor or you have a burnt wire. Like I said before, without cats you should hit over 400rwhp and you should be running high 11's.
You have made the first good step of putting the stock tune back in but I always suggest that people look at the mods they have done and look at how you may have created a problem.
I would be happy to discuss this on the fone with you at some point, you can email me a number, but looking at your mods, I wonder what you mean by cutting out. Did you check the wires that run by #4/#6 header primaries, one of those wires is your starter power wire, another is an 02 wire, and another is the crank wire.
I would highly suggest you work a deal with someone with Autotap and look for anomalies. If you have one bad coil or plug wire it's not doing make the engine die out. I suspect that either you have a dead or inoperable sensor or you have a burnt wire. Like I said before, without cats you should hit over 400rwhp and you should be running high 11's.
Originally Posted by Pro Stock John
Your process of fixing the car is way too random for me, you are never going to get anywhere this way.
You have made the first good step of putting the stock tune back in but I always suggest that people look at the mods they have done and look at how you may have created a problem.
I would be happy to discuss this on the fone with you at some point, you can email me a number, but looking at your mods, I wonder what you mean by cutting out. Did you check the wires that run by #4/#6 header primaries, one of those wires is your starter power wire, another is an 02 wire, and another is the crank wire.
I would highly suggest you work a deal with someone with Autotap and look for anomalies. If you have one bad coil or plug wire it's not doing make the engine die out. I suspect that either you have a dead or inoperable sensor or you have a burnt wire. Like I said before, without cats you should hit over 400rwhp and you should be running high 11's.
You have made the first good step of putting the stock tune back in but I always suggest that people look at the mods they have done and look at how you may have created a problem.
I would be happy to discuss this on the fone with you at some point, you can email me a number, but looking at your mods, I wonder what you mean by cutting out. Did you check the wires that run by #4/#6 header primaries, one of those wires is your starter power wire, another is an 02 wire, and another is the crank wire.
I would highly suggest you work a deal with someone with Autotap and look for anomalies. If you have one bad coil or plug wire it's not doing make the engine die out. I suspect that either you have a dead or inoperable sensor or you have a burnt wire. Like I said before, without cats you should hit over 400rwhp and you should be running high 11's.
As for how I may have created the problem, the car never ran bad before the supercharger install, now even if the supercharger is disconnected it runs bad, the inline fuel pump is still hooked in, I need to bypass that still to pull it out of the mix, so from what I can see, the problem is not my previous mods, but rather something that was screwed up while doing the supercharger install. I just have to find out what, I bought springs because my car has almost 100K on it so I figured it was time to replace them, seeing as how the stock LS1 springs are weak anyway. Thanks for the offer...I'll send you my number.
