KW87GTA

I just picked up an AutoXray XP240, and I notice that when I plug it in and turn the power on, my idle rises from about 600 to 1000, why? Also, is there anywhere I can find what all of these sensors are supposed to be reading under normal conditions? Thanks.

Omar

I had the same exact thing happening with my car. It would advance the idle speed, and also advance timing. It would advance the timing so far, that I could actually hear the detonation while doing a WOT run. If you read the manual, it dedicates a "warning" page for this situation. IIRC, it stated that with certain ECM's, this would happen and you could only monitor the car while parked.

I emailed the company, and never got a response. I ended up selling it and I am MUCH, MUCH happier with my Diacom Plus.

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1989 IROC-Z 5.7L
NOS 150HP kit
ProBuilt 700R4, PI Vigilante 2800 stall lockup
Baer Brakes 12" Sport System

MikeH

iTrader: (10)

I remember reading the same thing Omar is talking about. I didnt have any problems with mine though it works great.

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Black 90 IROC, L98, A4, 323 gear. SuperRamed 406 in the works!

john5.7 87Iroc

I have the same problem "sometimes". I know the warning they give like stated above but I thought that only applied to older computers like 86 and earlier or something like that because there computers are slower or someting but I guess thats wrong and also applies to later cars too. I dont know much about computers but is there a way we could switch to a better computer? What all would need to be switched? I would really like my scanner to work right with my car.

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1987 Iroc 350
GTS headlight/tail light covers
Camaro SS Wheels w/Sumitomo HTR ZII 275 rear, 255's in front
K&N filters
Adjustable Borla cat back
SLP 1 3/4 headers
w/ Air born coating
3" Catco cat
Large tube runners
ported plenum
Holley afpr

FUTURE GOAL:
To go really F'in fast!!!

Some pics of it at
http://albums.photopoint.com/j/Album...949&Auth=false

[This message has been edited by john5.7 87Iroc (edited June 29, 2001).]

Kevin91Z

iTrader: (1)

Convert to Speed Density, its the fastest thirdgen computer. However you should be able to get fast mode with an 86-89 TPI computer. Check your ALDL connector. I was recently tuning a guy's 86 IROC, and we couldnt connect in fast mode. After a little research we noticed that he was missing a wire in the ALDL. It was one of the data wires in pin M, I believe. He only had pin E hooked up. A jumper on the back side hooked up pins M and E and then we could read his car in full speed mode.


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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

john5.7 87Iroc

K

[This message has been edited by john5.7 87Iroc (edited June 30, 2001).]

john5.7 87Iroc

Kevin ill check that out. That might explin why my scanner wont always respond when trying to scan my car.

KW87GTA

Thanks for the input everyone, but no one has still answered my question. Why does my idle rise? Is this bad, does it mean I am getting false readings, and how can I correct it? Thanks.

Jza

Why? I'm thinking it has something to do with the computer having to go into a "service mode" in order to feed the information to the AutoXRay. You know, like when you put the car into field service mode and all the relays click, the IAC opens up, etc etc?

JPrevost

Jza, I agree. There are different modes that the ecm can be in. With software like Diacom you can run all the modes but I don't know about the hand held tools. I always use "normal" mode but most of the hand held scanners run in aldl. I don't really understand why they even have this as a mode because I think it's worthless. I have yet to run my car in aldl mode but when I do the idle increases and in my car it runs like crap. In the eprom there is a setting for aldl idle speed and this is probably what's happening.
As for the values, the scanner should have a discription of each. If not I'll do a print screen on the diacom software I have to show you a description of each. You should be able to find the values just searching this board. Good luck

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, Jon (350 TBI!)
91 Red My website

Omar

I emailed Autoxray about this problem 6.5 months ago! They JUST responded the other day. I wonder if they read these message boards. That "quick" of a response shows their quality of customer support. Either way, it doesnt matter since I sold my unit and am not a supporting customer anymore. This was my email:

On page 6 of the user manual, it states: "On some vehicles in
order to retreive data, the ignition timing is affected. If your idle speed
is effected while monitoring, it is recommended that the vehicle is not
driven while being scanned".
This situation is happening on my vehicle, causing it to HEAVILY detonate
under driving conditions. I did buy this scanner to monitor real time
driving conditions, spec. 02 voltage readings and knock sensor readings at
WOT. Is there a way around this? Thank you for your time!

THEIR ANSWER:
unfortunately there is not away around this.
ken@autoxray.com




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1989 IROC-Z 5.7L
NOS 150HP kit
ProBuilt 700R4, PI Vigilante 2800 stall lockup
Baer Brakes 12" Sport System

Grim Reaper

Some ecms do not support "Normal" mode unfortunately. I have tried my Diacom on some other buddies' cars and some did not have "Normal".

FastBroker

SnapOn does the same thing while in DIAG mode, raises idle speed, etc.

You/I need to use ROAD TEST mode to get things back to normal... Doesn't make much sense to use a tool that you cannot use while driving...