Timing light question - Ford Mustang Forums : Corral.net Mustang Forum
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post #1 of 13 Old 04-02-2019, 09:33 PM Thread Starter
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Timing light question

I have a 92lx and I am in the process of attempting my first start with a Holley hp stand-alone ecu. I went with a dual sync distributor and I need to check timing.


This is where the joke comes. I have never checked timing before and even watching the YouTube videos of it, I still have questions about doing it right.

My ecu will control the timing, but I have to make sure it matches what the ecu is telling it to be.

What do I do? I am running the msd6al2, tfi coil, dual sync distributor.

Do I just buy a cheap To midrange timing light and play with it until I find out how to use it?

Whatís weird on the dual sync distributor is that it goes in 50 deg before top dead center.

Any ideas guys?

Thanks

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post #2 of 13 Old 04-02-2019, 09:41 PM
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disconnect the ECM wire, SPOUT, that goes to the ignition module

and set it.


89 GT gr-40, KB2200(10psi), tweecer R/T,LC-1, 22gal cell, w/tailpipes.
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post #3 of 13 Old 04-03-2019, 08:36 PM Thread Starter
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Can anyone else explain it like Iíve never done this before please?

Thanks
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post #4 of 13 Old 04-03-2019, 09:00 PM
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First off I have to know if you are using a crank trigger and if the dist is now a cam sync. The answer to that changes how you set and verify timing.
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post #5 of 13 Old 04-03-2019, 09:22 PM
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Quote:
Originally Posted by 351 View Post
Can anyone else explain it like Iíve never done this before please?

Thanks
your holley must have an output that goes to the ignition module, severe it
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89 GT gr-40, KB2200(10psi), tweecer R/T,LC-1, 22gal cell, w/tailpipes.
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post #6 of 13 Old 04-04-2019, 07:33 PM Thread Starter
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Quote:
Originally Posted by Saleen414 View Post
First off I have to know if you are using a crank trigger and if the dist is now a cam sync. The answer to that changes how you set and verify timing.
No crank trigger, dual sync now is a cam sync.

Innova told me none of their timing lights would work with my msd6al2.

ETA: Iím trying to check timing before first start of my Holley hp ecu. Ecu would control it but Iím trying to follow the instructions and see if timing is spot on or close.
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post #7 of 13 Old 04-05-2019, 07:13 AM
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There should be a fixed timing test you can perform. You enter in how much timing you want the engine to have, apply that setting, and the ecu keeps it at that amount regardless of rpm and you then check with a timing light if the amount you have commanded is the same as the timing light shows.
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1989 Saleen 414 358cid SBF 2.8L Kenne Bell S/C
26 X 8.5 Hoosier
Best 1/4 mile time 8.623 @ 159.82 mph with a 1.34 60' (5.57 1/8th at 128)
Best 1/8 mile time 5.339 @ 133.46 mph with a 1.29 60'
08' Bullitt #4097 N/A 340ish RWHP <<<<<FOR SALE!
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post #8 of 13 Old 04-05-2019, 11:43 AM Thread Starter
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Quote:
Originally Posted by Saleen414 View Post
There should be a fixed timing test you can perform. You enter in how much timing you want the engine to have, apply that setting, and the ecu keeps it at that amount regardless of rpm and you then check with a timing light if the amount you have commanded is the same as the timing light shows.
Yes sir, thatís what Iím trying to do.
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post #9 of 13 Old 04-05-2019, 04:34 PM
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[ETA: Iím trying to check timing before first start of my Holley hp ecu. Ecu would control it but Iím trying to follow the instructions and see if timing is spot on or close.[/QUOTE]

If you truly mean you want to check it with the light BEFORE first start... You can't, it has to be running. Not sure how to tell you how to make sure it's in the ballpark with that distributor.
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post #10 of 13 Old 04-05-2019, 05:15 PM
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Why does the engine have to be running? Pull the fuse to the fuel pump or turn the pump output off in the software if you can. When you crank the engine the coil will fire.
I haven't looked at the holley software in awhile. There should be an ignition timing table for idle. If not just make the lower rpm/load cells the same timing value so it won't change when checking.

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post #11 of 13 Old 04-05-2019, 10:13 PM Thread Starter
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Originally Posted by Dave_B View Post
[ETA: Iím trying to check timing before first start of my Holley hp ecu. Ecu would control it but Iím trying to follow the instructions and see if timing is spot on or close.
If you truly mean you want to check it with the light BEFORE first start... You can't, it has to be running. Not sure how to tell you how to make sure it's in the ballpark with that distributor.[/QUOTE]

Thank you for the reply. Instructions on distributor and ecu state to turn it over and check timing with injectors unplugged
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post #12 of 13 Old 04-05-2019, 10:15 PM Thread Starter
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Why does the engine have to be running? Pull the fuse to the fuel pump or turn the pump output off in the software if you can. When you crank the engine the coil will fire.
I haven't looked at the holley software in awhile. There should be an ignition timing table for idle. If not just make the lower rpm/load cells the same timing value so it won't change when checking.
Yes sir they have the table in the software. Holley days to check and see that the new dual sync distributor matches what the ecu is commanding.

Iím just trying to follow what they ask for, Iíve already messed many things up on my way to install this stand-alone.

Thanks
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post #13 of 13 Old 04-10-2019, 06:31 PM
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Quote:
Originally Posted by stangjumper View Post
Why does the engine have to be running? Pull the fuse to the fuel pump or turn the pump output off in the software if you can. When you crank the engine the coil will fire.
I haven't looked at the holley software in awhile. There should be an ignition timing table for idle. If not just make the lower rpm/load cells the same timing value so it won't change when checking.
Just thinking about my statement. There should be a cranking ignition table that the ecu uses only during cranking. This is the value you will be looking for on the damper if you remove the fuel. It will crank but not start.
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