No response from ECM after engine swap
Thread Starter
Junior Member
Joined: Nov 2005
Posts: 17
Likes: 0
From: Sweden (W. coast)
Car: ´86 Camaro IROC-Z/28 T-top
Engine: 327 (331)TPI
Transmission: th700r4
Axle/Gears: should be 3.73
No response from ECM after engine swap
Hi,
I have just swaped engine and while it were out of the car i took liberty to clean up in the wiring harness.
But When i came to start it, nothing. I have spark but the injectors does not open and the SES light will not come on and i cant logg the ECM via terminal "E".
semes like the ECM is dead.
I took my multimeter to the injector harness and i got 12,7v on both ends in the conector, shortcut somewere or impossible to messure while the other conectors are conected?
What Pins on ecm should have +12V, Gnd and other serial pins i could Ohm check for short cut threw out harness?
Sorry for my English, hope it´s some what clear.
I have just swaped engine and while it were out of the car i took liberty to clean up in the wiring harness.
But When i came to start it, nothing. I have spark but the injectors does not open and the SES light will not come on and i cant logg the ECM via terminal "E".
semes like the ECM is dead.
I took my multimeter to the injector harness and i got 12,7v on both ends in the conector, shortcut somewere or impossible to messure while the other conectors are conected?
What Pins on ecm should have +12V, Gnd and other serial pins i could Ohm check for short cut threw out harness?
Sorry for my English, hope it´s some what clear.
Last edited by 327 iroc; Apr 8, 2012 at 11:13 AM. Reason: spelling
Supreme Member
Joined: Jan 2006
Posts: 3,341
Likes: 10
From: Mooresville NC
Car: LOWERED ♦ CRIMSON METALFLAKE
Engine: ► 400 KUBES ◄
Transmission: 765R4
Axle/Gears: EATON POSI 4.56
ECM Mayhem
With the key in the RUN position, you need 12V on pins A6, B1 and C16.
Main grounds are A12, D1, D3, D6, D10.
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Slamming The Wall Is Not The Neatest Way To Remove An Engine
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Main grounds are A12, D1, D3, D6, D10.
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Happy Racing!
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Slamming The Wall Is Not The Neatest Way To Remove An Engine
.
Thread Starter
Junior Member
Joined: Nov 2005
Posts: 17
Likes: 0
From: Sweden (W. coast)
Car: ´86 Camaro IROC-Z/28 T-top
Engine: 327 (331)TPI
Transmission: th700r4
Axle/Gears: should be 3.73
Re: ECM Mayhem
Thanks NINÅ,
power suply and ignition suply OK.
Ground OK
Power on D15 D16 (injectors)
Ohm checked the harness and it all checked out just fine, no openings or shortcuts.
Could not see a "pulse-signal" from distributar (put a light-bulb between the B5 wire and ground)
I tried to plug in my laptop but could not get comunication.
It wont even flash DTC´s, not even DTC 12.
How can i check the pick-up unit???
Thanks for all help so far
power suply and ignition suply OK.
Ground OK
Power on D15 D16 (injectors)
Ohm checked the harness and it all checked out just fine, no openings or shortcuts.
Could not see a "pulse-signal" from distributar (put a light-bulb between the B5 wire and ground)
I tried to plug in my laptop but could not get comunication.
It wont even flash DTC´s, not even DTC 12.
How can i check the pick-up unit???
Thanks for all help so far
Supreme Member
Joined: Jan 2006
Posts: 3,341
Likes: 10
From: Mooresville NC
Car: LOWERED ♦ CRIMSON METALFLAKE
Engine: ► 400 KUBES ◄
Transmission: 765R4
Axle/Gears: EATON POSI 4.56
Pickup Line
You can check the pickup coil by
disconnecting the 4 terminal connector at the distributor.
If you then have spark replace the pickup coil.
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Happy Racing!
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If Your Communications Antenna Is Not Shaking At Idle, Your Cam Is Too Mild
.
disconnecting the 4 terminal connector at the distributor.
If you then have spark replace the pickup coil.
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
If Your Communications Antenna Is Not Shaking At Idle, Your Cam Is Too Mild
.
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