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No injector pulse, no power on pin 102


alik
Member +
40/2000


Galant VR-4 org Post #: 1242547 posted 05/12/18 10:23 AM     Remind Me!  Send Private Message   Edit Post      
the car starts, but won't run.
I've put a test light on PCM connectors, and I've got no power on 102 & 107, and no ground on 106.

Could someone confirm that the MPI relay is the culprit?

Thanks!!!



#40/2000, Nile Black
'90 Miata, waay too fast in corners

Posts: 357 | From: Boston, MA | Member Since: 08/08/06 | IP: (73.17.151.96) | Report this post to a Moderator

thomcasey
I ain't no puny human
1025/2000


Galant VR-4 org Post #: 1242563 posted 05/14/18 06:00 AM     Remind Me!  Send Private Message   Edit Post      
106 is Chassis ground. Have you tried correcting that problem to see is the symptoms change? Pin 106 feeds the Camshaft Position Sensor ground. Also check Pin 101 as it is also ties to pin 106.



Thom
1991 GVR-4 1025/2000 (PTE 1200's, 16g, DSMLink v3, gm-maf, eagle/ross, .020 over, 272's)
1992 GVR-4 866/1000. Ready for all of the above.


Edited by thomcasey (05/14/18 06:05 AM)

Posts: 751 | From: Indianapolis, IN | Member Since: 09/24/14 | IP: (12.109.79.254) | Report this post to a Moderator

alik
Member +
40/2000


Galant VR-4 org Post #: 1242565 posted 05/14/18 07:20 AM     Remind Me!  Send Private Message   Edit Post      
There's ground on 101, but not on 106.
Is that weird?



#40/2000, Nile Black
'90 Miata, waay too fast in corners

Posts: 357 | From: Boston, MA | Member Since: 08/08/06 | IP: (146.115.72.141) | Report this post to a Moderator

thomcasey
I ain't no puny human
1025/2000


Galant VR-4 org Post #: 1242568 posted 05/14/18 09:15 AM     Remind Me!  Send Private Message   Edit Post      
Depending on where they interconnect, not weird at all. 27 year old harness after all.



Thom
1991 GVR-4 1025/2000 (PTE 1200's, 16g, DSMLink v3, gm-maf, eagle/ross, .020 over, 272's)
1992 GVR-4 866/1000. Ready for all of the above.

Posts: 751 | From: Indianapolis, IN | Member Since: 09/24/14 | IP: (12.109.79.254) | Report this post to a Moderator

alik
Member +
40/2000


Galant VR-4 org Post #: 1242569 posted 05/14/18 09:21 AM     Remind Me!  Send Private Message   Edit Post      
So it would make sense to jump 106 to ground? Or tie it to 101?



#40/2000, Nile Black
'90 Miata, waay too fast in corners

Posts: 357 | From: Boston, MA | Member Since: 08/08/06 | IP: (146.115.72.141) | Report this post to a Moderator

thomcasey
I ain't no puny human
1025/2000


Galant VR-4 org Post #: 1242570 posted 05/14/18 09:29 AM     Remind Me!  Send Private Message   Edit Post      
Yes. Also look at the CAS and verify the ground pin is working/good.



Thom
1991 GVR-4 1025/2000 (PTE 1200's, 16g, DSMLink v3, gm-maf, eagle/ross, .020 over, 272's)
1992 GVR-4 866/1000. Ready for all of the above.

Posts: 751 | From: Indianapolis, IN | Member Since: 09/24/14 | IP: (12.109.79.254) | Report this post to a Moderator

alik
Member +
40/2000


Galant VR-4 org Post #: 1242571 posted 05/14/18 09:31 AM     Remind Me!  Send Private Message   Edit Post   
Thank you, sir!
Will do!



#40/2000, Nile Black
'90 Miata, waay too fast in corners

Posts: 357 | From: Boston, MA | Member Since: 08/08/06 | IP: (146.115.72.141) | Report this post to a Moderator


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