LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

AutoXray Capture Results

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Old Apr 6, 2004 | 08:33 PM
  #1  
SLeeper94Z's Avatar
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AutoXray Capture Results

Hey, I scanned my car with Autoxray can anyone tell me anything looks wrong with my readings thanks
Operational Data, Car running at idle

01. Desired Idle 575 rpm
02.Engine Rpm 600 rpm
03.Coolant temp 170.6F
04.Manifold air temp 100.4F
05.A/c Pressure 3 psi
06.Map Sensor 1.56 Volts
07.Throttle Sensor 0.70 Volts
08.Throttle Posn 0%
09.Battery Voltage 12.9 Volts
10.Barometric Pressure 100.6 kPa
11.Left Oxygen Sensor 453 Mvolts
12.Right Oxygen Sensor 453 Mvolts
13.Blk Lrn Cell 16
14.Left Block Learn value 128
15.Right Block Learn value 160
16.Left Integrator value 128
17.Right Integrator value 128
18.Left Inj pulse 3.1 ms
19.Injector Pulse 3,9 ms
20.CCp Duty Cycle 0.0%
21.Idle air mtr pos 16 steps
22.Learned Idle Pos 30 steps
23.Spark Advance 19'
24.Knock Retard 0'
25.Knock Sensor 90 counts
26.Egr Duty Cycle 0.0%
27.Vehicle Speed 0 mph
28.run time 147 seconds
29.A/c Clutch Disabled
30.A/c Not Requested
31.Park/Nuetral Detected
32.Cruise Control Not Engaged
33.Brake Depressed No
34.Tcc Status Not Locked
35.Fan number 1 On
36.Fan number 2 On
37.Air Switch Solenoid off
38.Closed loop Mode Off
39.Oxygen Sensor Not ready
40.R Rear Oxygen Sensor Not ready
41.Learn Control Disabled
42.Kickdown Pattern Not active
Old Apr 6, 2004 | 09:50 PM
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anyone have any input?
Old Apr 6, 2004 | 10:25 PM
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Auto Xray people unite! Just joking...

Well since you were in open loop why is your right block learn 160? THat is maxed out, and should be 128 always in open loop. Typo? YOur A/C pressure is 3#? YOu have a huge leak and hence either a/ no a/c (deleted?) or b/ a giant hole in a line or bad seal somewhere. Your right injector pulse is .8 ms more than your left, something that *may* want to looked into, could be related to the right intgrator it is a possibility. For a 2.5 mins of runtime why is your IAT 100*? was this a cold start? Or was it running beforehand?
Old Apr 6, 2004 | 10:34 PM
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Your fans are also on. Do you have the fan programming changed or is the SES on?

You might have an exhaust leak messing with the right block learns.
Old Apr 6, 2004 | 10:40 PM
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It was just started after about an hour of letting it sit, and the car was running at idle for a couple minutes.. I've been noticeing
my car is idleing like I have a 900 lift cam , i cleaned my air filter and it cleared up a bit, runs fine at WOT, Maybe Vacuum or burnt plug wire will check tommorow... MY ac is deleted btw... how can this injector problem hurt anything? whats a right integrator?
Old Apr 6, 2004 | 10:43 PM
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shoebox Your fans are also on. Do you have the fan programming changed or is the SES on?

Yea I got a code for the fans its a open wire grounding out,also if i have a exhaust leak would it be on my right side passenger?
Old Apr 6, 2004 | 10:52 PM
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Yeah, check right side exhaust.
Old Apr 6, 2004 | 11:15 PM
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I think that is the closest thing to a story I've read in a log time, we could make a game outta this, "why is my car jacked up?"


if I were to post mine it would be a funny game.
Old Apr 7, 2004 | 05:45 AM
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Those readings are pretty darn scary!!!!!!!

1)You had your car running for 3 minutes and it still running in open loop... Mine goes into close loop in two minutes with the engine above 150*f


2) The oxygen sensor readings are showing both an exact 453mvs with the engine running..the chances of you getting that scanner reading with both identical are slim to none, however hats the kind of reading you will get with the Key on Engine off after the O2's warmed up to working temp... (your reading is really fishy) were the O2s readings moving at all?? mine begin to move up and down in like 3 seconds...yours are dead center after three minutes??? something very wrong there..

3) since you are still in open loop there is no reason why the right block learn value should be anything other than 128 ( I suspect your PCM is fudged up......or something else is.

4) My Baro is in Volts... when I read yours I thought it was too high... are you at sea level? can someone remind me whats the max Baro in Killopascals?? I forgot


5) Your Map Sensor reading of 1.56 volts... is this with the stock cam?? thats the kind of reading I would get with my AC on... some light load on the engine..... but your AC is deleted.. mmmm vacum leaK???

6) Your learned Idle Pos is 30 yet the actual position is 16 steps..the IAC its reducing the amount of air going into the engine... vacum leak?

7) I noticed your injector pulse is pretty much ok (no wait!! Edit here.. mine was at 2.7 mS so 3.9... kinda high) the PCM is trying to reduce air into the engine.... I am thinking vacum leak... bad plug wire that causes misfiring.... and if your car pops at the mufflers.. it may be the opty crap... is your engine running rough?

Question is your car running rough?? poping through the muffler??


8) why the hell is your car on block learn cell 16?? isnt that for WOT?? dang you should be somewhere between cell 1 through cell 5 and even that I think its wrong.... cell 16?? I cant recall my cell blocks but I dont think 16 is right/// can someone correct me here??


Man something is really wrong with your beast....


keep me posted I want to find out what solution you find..

marvin

Last edited by MentalCaseOne; Apr 7, 2004 at 06:30 AM.
Old Apr 7, 2004 | 05:53 AM
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OOOOOOPS!!! I SPOKE TO SOON ABOUT THE BARO!!!!

disregard what I said about the BARO.... I think the reading is normal.... so never mind about the BARO... mine reads in volts and I have no idea why I even said 100kpa sounds too much... I am a moron.. dont pay attention to it ok??

Marvin
Old Apr 7, 2004 | 05:55 AM
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Hey... where is your Mass Air Flow reading??

should be somewhere around 7 grms per sec at idle...


also I pulled one of my old scans at idle and the injector pulse for both left and right its a 2.70mS



looks like its running rich..

Last edited by MentalCaseOne; Apr 7, 2004 at 06:19 AM.
Old Apr 7, 2004 | 07:36 AM
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Originally posted by MentalCaseOne

3) since you are still in open loop there is no reason why the right block learn value should be anything other than 128 ( I suspect your PCM is fudged up......or something else is.


Short term or integrator will be 128 but block learns will be whatever is stored in memory.

Originally posted by MentalCaseOne


8) why the hell is your car on block learn cell 16?? isnt that for WOT?? dang you should be somewhere between cell 1 through cell 5 and even that I think its wrong.... cell 16?? I cant recall my cell blocks but I dont think 16 is right/// can someone correct me here??
Mine always idles in 16.
Old Apr 7, 2004 | 08:13 AM
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Cool

Sorry to be off topic but which Auto Xray do you have? I had no idea they gave out that much info in scan mode.

That totally rocks.

A vacume leak on the one side would explain why the pulse width is longer as the engine would try to compensate for it through the O2 sensors. It is odd thet left and right read exactly the same. Run the engine around the block and then scan it. Other than your system voltage being low I didn't see anything that someone else that wasn't already mentioned.
Old Apr 7, 2004 | 02:09 PM
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Other than your system voltage being low

I noticed the same problem with my AutoXray scanner... the actual voltage at the battery is One Volt above the scanner reading. I havent taken a voltage reading right at the PCM in my car but Honestly I dont believe I will see a One volt loss between the PCM and the Battery..unless the PCM power is being fed by a small diameter wire. I will look into it but I doubt it.

I Emailed AutoXray about it and they say weather that reading is acurate or not thats what the PCM is reporting. Anyway, I am assuming his voltage at he Battery is exactly one volt higher than what he has on his scanner.


Marvin
Old Apr 7, 2004 | 02:14 PM
  #15  
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Short term or integrator will be 128 but block learns will be whatever is stored in memory.
I didnt know it. My car always shows 128 when on open loop or when the MAF is disconected. This is good to know.


Also from on of my old Logs at Idle... I see my car on block learn cell 4. and Shoebox's car is on 16. I don't know wheather this is right or wrong on my car.


Marvin



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