Holley/ Starting issue
05-21-2019 | 08:12 PM
#45
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Joined: Jan 2002
Posts: 4,612
Likes: 7
From: ALTO, MI
The purple wire to the
EFI doesn't power it. It just turns it on.
the 50* timing setting is the mechanical timing you have to physically set the distributor to it is not the timing you set on the computer.
You can't advance timing you can only delay it. SO you set the distributor at 50* timing and then the EFI delays the timing to what ever it wants.
So if you don't have the initial 50* timing set properly than your EFI computer set timing will not be correct.
EFI doesn't power it. It just turns it on.
the 50* timing setting is the mechanical timing you have to physically set the distributor to it is not the timing you set on the computer.
You can't advance timing you can only delay it. SO you set the distributor at 50* timing and then the EFI delays the timing to what ever it wants.
So if you don't have the initial 50* timing set properly than your EFI computer set timing will not be correct.
05-21-2019 | 09:29 PM
#47
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Joined: Jan 2002
Posts: 4,612
Likes: 7
From: ALTO, MI
I didn't read that it ran on the dyno. Where do you read this?
If it ran on the dyno and he has spark and fuel it would be running now.
Something is not set right.
Are the injectors getting power?
If the timing is not correct it is not going to run.
If it ran on the dyno and he has spark and fuel it would be running now.
Something is not set right.
Are the injectors getting power?
If the timing is not correct it is not going to run.
Last edited by Tinkerer; 05-21-2019 at 09:32 PM.
05-22-2019 | 03:40 AM
#48
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Joined: Feb 2006
Posts: 519
Likes: 15
LTZCrew mentioned it twice.
05-22-2019 | 10:35 AM
#49
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Joined: Feb 2012
Posts: 252
Likes: 3
From: Kelowna
not sure on current draw of the computer-
the red/white wire as far as i knew is only a signal wire to tell the ECU im cranking the motor unless im missing something in the diagram, i don't think it should really have any draw
it was on the dyno running so im was going after something that has changed, could have changed or is totally different
this timing thing has me thinking tho. i talked to the installer and they say they did not pull the distributor but who knows. it looks like it would be a super tight fit to install this motor with out pulling it.
to check this 50* i would disable the computer control to the distributor - pull the highlighted connector - and fuel injectors and crank the motor and have 50* with a timing light showing at the TDC mark on the balance?
just want to make sure im checking this right.
with the merc manual for the 575SCI it shows base timing set at 8*, would this be checked the same way or with the computer having control
want to make sure im checking it correctly
the red/white wire as far as i knew is only a signal wire to tell the ECU im cranking the motor unless im missing something in the diagram, i don't think it should really have any draw
it was on the dyno running so im was going after something that has changed, could have changed or is totally different
this timing thing has me thinking tho. i talked to the installer and they say they did not pull the distributor but who knows. it looks like it would be a super tight fit to install this motor with out pulling it.
to check this 50* i would disable the computer control to the distributor - pull the highlighted connector - and fuel injectors and crank the motor and have 50* with a timing light showing at the TDC mark on the balance?
just want to make sure im checking this right.
with the merc manual for the 575SCI it shows base timing set at 8*, would this be checked the same way or with the computer having control
want to make sure im checking it correctly
Last edited by LTZCrew; 05-22-2019 at 10:41 AM.
