I´m trying to find out what is causing my problem

I´m not getting the power to the wheels,and the engine pops from 5-7K and makes no power at all

O2 sensors readings are juming up and down,INT,BLM
i have seen ignition adv of 44degrees

How is my tune,good or bad?

I have allmost a new engine,ignition and fuel system

I have a 1993 LT1,full bolton and C/H package

The file
Dropfiles.net - Free File Hosting

what´s your opinion about whats causing this?

 

You probably won't get too much help as:

1) You don't mention what the particular file is that you are offering and for what scan tool. People generally don't download files without more information. For all we know, you are attempting to cause a "datalogger" to install on our computers to scoop our banking info. Please identify the file and the scan tool so people can see if they are interested in downloading it.

2) The problem you are describing is pretty vague. Give more info.

3) This is a 3rd Gen, not a 4th Gen site. Lots of expertise on the ECMs & programming for 3rd Gens. Not too much for 4th Gens.

 

Good point,i forgot to say i use Tunerpro Rt 4,14

This is a .ads Log file.I used LT1_92-93.ads and Da3.xdf

the problem is that tha car makes no power,idles badly,and is way to rich for some cause

What could cause such a mess,sensor error or bad tuning

I know this is L98 Forum but an engine is an engine

 

DA3 is fine. 4th gen, yes, but GM OBDI, so we'll "let that slide."

However, more relevant is whether or not you've absolutely ruled out mechanical issues. What's your setup like? Stock? If so, it's almost certainly mechanical.

 

That´s what i´m trying to find out,what is causing this problem

I have a mailorder tune from pcmforless

I have replaced the opti,plug.,wires,coil,,fuel pump,injectors,fuel filter so there should be no fault there

I just thought if someone might see if there was an obvious reason for loss of power in the log f.ex sensor output

 

In all honesty, I should be deleting this thread as this Board is intended for "do-it-yourself" eprom tuning, not diagnosing problems with "mail-order" programming or mechanical issues.

However, I am prepared to leave it open for now.

First, when did your problems begin? Have you done mods? How many miles? Has your engine been rebuilt? And have you tried reverting to the original programming?

I would start by trying the original programming to see if the problem persists, get's worst or improves.

 

Thank you Grim Reaper

I took my engine out of the car for a rebuild and tune

Custom Cam 234/240dur 544/537lift 112las on 108IC,Heads ported,2.02/1,60 Valves,58mm TB,LT headers,1,6RR and so on

I´m trying to tune it myself but i´m going to continue undill the motor is "normal"

I´m asking if someone saw something wrong with the sensors output

I haven´t tryed to revert to stock programming because the engine is normal at low rpm 1000-4000rpm but at 4000-7000rpm i have no power,so either my tune is off,the sensors are bad or i have ignition problems but i have a new ignition,Coil,Wires,plugs,Fuel pump,Fuel filter ect..

So either i have bad sensors or a bad tune,i can´t seem to find the problem

 

After a quick look at the log, The main thing I saw was that you had 15 mS PW above 4K rpm and your O2 sensors were way lean (single digits).
Might want to tape a fuel pressure gauge to the windshield and see if its dropping above 4K rpm. Fuel was tring to get there, just didn't make it.
Good luck.

 

That is a decent size cam. Sounds like it might be time for bigger injectors. JMHO

 

You are running a SEFI ECM in that thing right? So, to us double fire batch guys that would have an ALDL report of (15/2) = 7.5ms injector BPWs.

Need more info:
1) what is the injector size (#/hr)?
2) what is the fuel pressure?
3) what is the fuel pump?
4) how many miles on the fuel pump?
5) how many miles on the injectors?

 

36# inj new,43.5psi fuel pressure,255l walbro New

yes it´s a Speed density and has a SEFI

 

It seems like you are getting spark because it revs to 6K RPMs. Your injector duty cycle is 15ms/20ms = 75% at 6K RPM. If you are very sure that you checked all the mechanical stuff (like all eight injectors plugged connected), then I would increase the VE table above 4K RPM and see what happens.
I wonder if the 83 ECM reports zero on the O2 sensors when in PE MODE? It doens't seem likely because on O2 sensor is slightly above O2 mV.

It looks like either fuel pressure (fuel filter new also?) or something fuel related. The Walbro is plenty of fuel for your needs. The sensors seem to be reading fine and battery/fuel pump voltage is fine. After the fuel filter and line blockage (kinked) check, then try adding more fuel to the Upper VE table.

It almost seems like it has to be the fuel pump losing voltage / bad connection or a blocked line. Your injector duty cycles are good for (8*36*.75)/.54 ~= 400FWHP at 6K RPM. You probably need more VE fuel also.

 

Kinda just sounds like an opti problem, or messed up wires, or coil. Or, you fried your computer.

 

That is the first thing I thought of too. But then I was thinking why would it rev to 6K still. I know that when I get spark blow-out, the car just stops revving like it hit a spark controlled rev limiter.

It is strange how his O2 mV go to zero......no spark or no fuel. No spark would do the 0 mV thing. Some fuel would give an O2 with mV greater than zero. It is a tough one.

 

any Service Engine Light?
Did you remember to tap in the pin on the cam? for the older LT1s, the pin needs to be tapped in a little (like .030") or it will bend the optispark shaft. My brother forgot to tap his in and he had tons of popping and stuff to find out his optispark shaft was bent and bearings were all over inside the cap. He was getting frustrated with my tuning ability the whole time.
Just trying to name some other possibilities, from my experience.

 

That´s why i bought a new opti,Fuel pump and filter

No SES

The cam pin is in correct length

Allso i have a new H02S