1G ECU not booting up

[robert gsx1]

Ok im having intermetent issues my 1g 91 tsi starts idles rough then if i shut it off it wont start back up just turns over and over and the check engine light isnt coming on when igniotion is switched on, so i checked my mpi relay power there i then checked pin 102 and 107 no power at ecu please this is my daily driver i cant figure it out i need help fellas thanx Rob

 

[upgrading_86]

I always keep a spare ecu do you know someone you can that can let you plug it in and see if that stops your problem other than that you said its your daily driver so all the timing should be go right? I had the same issue but it was my timing turned over and over but never started

 

[Dsm Rob]

Remove the ecu and pull the cover off and check for any leaking caps. I've had the same prob a while back and the ecu caps leaked all over the circuit board.

 

[robert gsx1]

ill pull my ecu today and post picts it will start periodicly then idle fine once i turn it off it wont start again just turns over and there is no check engine light when i swith ignition to on letting me know the ecu is powering up

 

[robert gsx1]

Here are the pictures of my ecu if any one has any idea whats going on please let me know

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[Dsm Rob]

Looks like you found the problem, hopefully it can be saved.

 

[robert gsx1]

But from studying 1g ecu board specs those are the air fuel rim part of the board

 

[bryzenga]

Either way, it will have to be fixed. Leave it and the ECU eventually won't be repairable... If it already isn't too late.

 

[AWDPetmitsu]

Is this a turbo DSM? If so, if the boost gauge needle doesn't rise to 0 when the ignition is switched on, that's a sure sign of a bad ECU.

 

[robert gsx1]

yeah its a 91 tsi i figured it out coil pack went out and power transistor

 

[steve]

yeah its a 91 tsi i figured it out coil pack went out and power transistor

Maybe, but that ECU is/was bad. The pictures tell the whole story.

The capacitors have leaked and the corrosion is not only eating the traces on the circuit board but it's climbed up the hybrid IC, that controls the MPI Relay, and damaged the IC. That will cause the symptoms described.

Sorry I didn't catch this thread back in the day.