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really troubled log is ECM at fault?

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Old Aug 8, 2006 | 08:53 PM
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IroczInOz's Avatar
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really troubled log is ECM at fault?

I know there are heaps of experienced guys on here. Can someone spend 1 minute and look over the log I have attached. Right away you will notice that all the values are way off. Even the PROM ID changes in the data log?

What are the possible causes of this?

I doubt it is the chip since we have tried 5 different ones and the car acts really bad! Even a hypertech chip runs like crap.

Could this be a result of a died ECM?
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Old Aug 8, 2006 | 09:41 PM
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Most definately! I'd say your ECM is totally fubar!

Changing PROM ID, wierd numbers, bad running... assuming at one point it was running good, and/or you know the wiring is good (including all grounds!), I'd say replace the ECM.

also assuming you have the correct ALDL definition file...
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Old Aug 8, 2006 | 09:54 PM
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Hmm,

I just checked the BIN PROM ID number in Tunerpro and it is DCB.
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Old Aug 9, 2006 | 10:42 AM
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If anyone has TunerPro RT installed take a look at the log.

When I export to CSV it shows up something totally different. And it cut off very short.

When I play back the aldl log file in tunerPro RT it goes through the motion like it should. BUt damn look at all the errors that pop up then go away etc...

Really looks like an ECM shot?
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Old Aug 9, 2006 | 12:16 PM
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what .xdf ($8d ??)

I looked at the log real quick (I am by no means an expert ... very new to tuning) ... from what I could see the idle went anywhere from 2000 RPM to 4500 RPM and the throttle postion never moved from 0%, BUT the TPS volts were 2 +/- volts ! Usually idle is around .47 - .5 volts.

Never changed from 10 kpa either ... And it never hit closed loop ? Usually kpa is around 55-65 for me at an idle.

Other thing I noticed is the log played very slow.

Edit: Yep Prom id changed at least 3 times ... did you try reburning the chip ?
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Old Aug 9, 2006 | 05:33 PM
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From: In your ear. No, the other one.
Car: '89 Trans Am WS6
Engine: 350 TPI
Transmission: T5WC
Axle/Gears: 3.08 posi
Looks like an incorrect ADS file to me, which, btw, is needed to view the ADL you attached above.
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Old Aug 9, 2006 | 10:46 PM
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The ADS data stream is the one used in TunerPro that comes with it in the data streams folder.

1227165 ECM, $6E mask.
----------
We have like 5 differnet chips we try out and they all do the same thing. Car runs like crap.

Last edited by IroczInOz; Aug 9, 2006 at 10:47 PM. Reason: Automerged Doublepost
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Old Aug 9, 2006 | 11:29 PM
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Basically the car is a 305 HSR.

I burnt a new chip using the $6E mask. Disabled the EGR, since HSR has no EGR provisions. Burnt to CHIP AT29C256 used the offsets as required.

Ran really well. Then the owner placed chip into memcal adaptor 1 pin off, when trying another chip. Ever since then car has run like crap and no matter what chip you put in the response is the same.

There was also some wiring done for the fans at the same time. An auto elec wired up so both fans would come on. Now at the same time. strange thing is that the FANS come on when starting car then turn off once car started. Maybe that had something to do with it? Some electrical spike or something. The 12+ was taken from the ignition coil wire.

The owner has since rewired it differently now to operate only via relay.

So I guess it could be a combination of a few things. But really the main question is why is the data so skewed when data logging. And the CSV export function in tunerpro does not work 100% and the data is totally different then in playback mode.
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Old Aug 12, 2006 | 12:33 PM
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Cover was taken off ECM and a melted chip found. Aparently this chip controls the fuel. Looks like someone for some reason soldered a piece of wire to one leg of the CHIP on the PCB and ran it to the corner of the case. Not sure what happened but maybe it shorted out or something since it was moved around a bit last couple days.

New ECM in and it drives like it should except for some tunining issues.
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Old Aug 12, 2006 | 07:15 PM
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From: In your ear. No, the other one.
Car: '89 Trans Am WS6
Engine: 350 TPI
Transmission: T5WC
Axle/Gears: 3.08 posi
That you were getting ALDL out of the old ECM says the car was NOT running in limp home mode. With the values in the log, though, I can't believe the car was even running at all.

Glad the ECM swap fixed it.
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