timing issues

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dusterbd13
MS/Extra Newbie
Posts: 34
Joined: Tue Mar 01, 2016 4:35 pm

timing issues

Post by dusterbd13 »

2-12-18 tune.msq
(110.54 KiB) Downloaded 11 times
Megasquirt2 3.47 with hei8 ignition. ecu was set up by diyautotune for the HEI

trying to confirm base timing and trigger offset, but I have a feeling I screwed something up somewhere along the line....

following these instructions: https://www.diyautotune.com/support/tec ... se-timing/

my timing light is showing an oscillating timing number from 10-35 degrees independent of rpm or trigger offset with the timing locked at 10 degrees. this is warmed up to full operating temp. distributor is completely locked out with no mechanical or vacuum advance even in it. bare housing with a hall effect sensor and HEI8 module remote mounted on a heat sink.

what am I missing? have I screwed something up?
what else do you guys need to know?
hybrid
Super MS/Extra'er
Posts: 1275
Joined: Thu Apr 07, 2005 11:23 pm
Location: Sydney, Australia
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Re: timing issues

Post by hybrid »

Maybe your trigger edge is wrong?
Do not load someone elses tune and expect it to work for you!
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rickb794
Super MS/Extra'er
Posts: 6155
Joined: Sun Dec 21, 2008 10:28 am
Location: Portland OR

Re: timing issues

Post by rickb794 »

I have never seen an HEI with a hall sensor, I have not seen everything but I'm pretty sure HEI are all VR.

Which section of the Extra manual have you followed for this installation?
Correctly identify your MS ecu here
Read the Do's and Don'ts to avoid the common pitfalls before starting your install or asking for help
Use only these manuals other manuals may cause brain damage or worse.
dusterbd13
MS/Extra Newbie
Posts: 34
Joined: Tue Mar 01, 2016 4:35 pm

Re: timing issues

Post by dusterbd13 »

http://www.msextra.com/doc/pdf/html/MS2 ... 4-108.html

Section i followed.

Rundown of further testing:
Ensured fixed iming was burned. Still fluctuating. 

Checked advance tables: no correlation. 

Disconnected the b wire. Holy crap.  The tack signal (via gauge) stopped bouncing.  Car stopped breaking up. Idle improved dramatically.  Finally revved clean to 5k and idled at the set 900 rpm. Timing light shows 20 degrees of advance for a commamded 10. No amount of trigger offset tweaking changed the 20 degree number.

Hooked b wire back up, car died instantly.  Restarted, and subsequent tests of connection of the b wire (pin d16) caused all the ignition issues to immediately return.

Confirmed all settings in tunerstudio to linked msextra manual.

 

What now?
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