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Boot1034 · Joined: 13 Jan 2010 Posts: 12

I was soldering a few things today and forgot to unpluc my ECU.

The car will not start now and when i turn the ECU on it seems to be earthing all my coil wires. If the ECU is off its back to normal.

Do you think i have stuffed my ECU ?

stevieturbo · Posted: Fri Mar 05, 2010 5:40 pm Post subject:

Could you elaborate as to what you were soldering ?
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383 LS1, YSi

9.85 @ 144.75mph
198.3mph over 7/8th mile logged by me.
http://www.youtube.com/watch?v=XgWRCDtiTQ0

Boot1034 · Joined: 13 Jan 2010 Posts: 12

I was soldering the coil pack wire +12 V i believe.

stevieturbo · Posted: Sat Mar 06, 2010 3:03 am Post subject:

Have you tried performing a coil/injector test ?
_________________
383 LS1, YSi

9.85 @ 144.75mph
198.3mph over 7/8th mile logged by me.
http://www.youtube.com/watch?v=XgWRCDtiTQ0

Boot1034 · Joined: 13 Jan 2010 Posts: 12

Yeah all appears to be working Sad

Its really strange.

I took the cover off the ecu and cannot see any damage. There could be a blown component though.

stevieturbo · Posted: Sat Mar 06, 2010 2:08 pm Post subject:

Without seeing what you have done, and being there to do some basic tests...Ive no idea.

Perhaps this new wiring you have done has messed things up, rather than damaged the ecu if the coils are working under test
_________________
383 LS1, YSi

9.85 @ 144.75mph
198.3mph over 7/8th mile logged by me.
http://www.youtube.com/watch?v=XgWRCDtiTQ0

Boot1034 · Joined: 13 Jan 2010 Posts: 12

The problem only happens when the ECU is turned on ( power)

If i use a continuity test everything Grounds.

With the ECU off everything goes where it should.

That why i can only assume its the ECU.

stevieturbo · Posted: Sat Mar 06, 2010 4:59 pm Post subject:

But you say you've done a coil test, proving that the coils work, and the ecu is able to trigger them.

Something doesnt make sense with your diagnosis.
_________________
383 LS1, YSi

9.85 @ 144.75mph
198.3mph over 7/8th mile logged by me.
http://www.youtube.com/watch?v=XgWRCDtiTQ0

mef · Joined: 27 Sep 2006 Posts: 242 Location: North West England

Are you absolutely sure that you didn't accidently touch the ecu case with the +12V wires that you were soldering? That will most certainly destroy the ecu as it melts a pcb track inside which is usually unrepairable. Best send the ecu back to DTA for a health check, it doesn't cost much and it will tell you if its the ecu or something else.

I cant see why soldering the +12V wire with it live would do any harm, even if your soldering iron was connected to the car earth it would either spark and alarm you or just blow a fuse.

Martin

1127rturbo · Joined: 14 Feb 2008 Posts: 17 Location: sussex

i have had the same problem on a second hand ecu i purchased and the drivers were cooked ! Alan at DTA changed them and all was fine
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Santa pod 8.90 166mph Gsxr1100