sequential no start on GM. 3.57 / 1.5.0 / MS3X

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sequential no start on GM. 3.57 / 1.5.0 / MS3X

Postby TheMU47 » Thu May 11, 2017 5:45 am

MS3X pre-assembled. 3.57. TS v 3.0.22, running the latest 1.5.0
My truck will not start. In test mode, the spark is good, injectors clicking. When cranking, I have no spark or fuel. This on LSJ Ecotec engine. GM 4x cam, 60-2 crank set at 120* btdc angle. During cranking, tuner studio shows cam and crank synced. Currently set at full sequential, poll level.
I am new to MS and tuner studio, but a quick study.
Laptop is next to me if you would like to hear any of the settings.

If it works normally in test mode, why is it not working while cranking?
Any help greatly appreciated.
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Re: sequential no start on GM. 3.57 / 1.5.0 / MS3X

Postby LT401Vette » Thu May 11, 2017 11:32 am

:msq:
Phil Tobin
EFI Analytics, helping to simplify EFI
Next Generation tuning software.
Supporting all MegaSquirt versions and firmwares.
http://www.TunerStudio.com
http://www.efiAnalytics.com/MegaLogViewer/
Support the firmware running your engine:
http://www.msextra.com/doc/donations.html
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Re: sequential no start on GM. 3.57 / 1.5.0 / MS3X

Postby TheMU47 » Thu May 11, 2017 1:07 pm

here's the msq. not sure what good a few seconds of cranking will do for logging. I'll log it if you need it.

MSQ attached
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2017-05-11_16.05.30.msq
(272.52 KiB) Downloaded 3 times
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Re: sequential no start on GM. 3.57 / 1.5.0 / MS3X

Postby TheMU47 » Thu May 18, 2017 8:34 am

switched to wasted COP and semi-sequential, still nothing. here's the msq and datalog of start attempt.
I could really use a hand here. It took two years to finish this truck, and it all comes down to squat if it doesn't F'n run.

Thanks.
Attachments
2017-05-18_11.27.50.msq
(284.47 KiB) Downloaded 1 time
2017-05-18_11.28.23.csv
(133 Bytes) Downloaded 3 times
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Re: sequential no start on GM. 3.57 / 1.5.0 / MS3X

Postby billr » Thu May 18, 2017 8:55 am

That CSV file is empty. Regardless, we need regular run log (MSL); and maybe a "tooth log" would help, too. Yes, even a few seconds of logging can be useful.

I gotta ask... have you checked ignition timing with a light, while cranking? If you have no spark (while cranking), you can't have any confidence about that "tooth #1 angle" yet.
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Re: sequential no start on GM. 3.57 / 1.5.0 / MS3X

Postby TheMU47 » Thu May 18, 2017 9:11 am

well, I had removed the crank position sensor, and counted the teeth back to the sync (missing teeth) and counted 20 teeth. So it should be 120*.

I'll get another log. Still trying to figure out how this program works.

I have not put a timing light on it. I don't have one.
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Re: sequential no start on GM. 3.57 / 1.5.0 / MS3X

Postby whittlebeast » Thu May 18, 2017 9:16 am

You need a timing light.
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Re: sequential no start on GM. 3.57 / 1.5.0 / MS3X

Postby TheMU47 » Thu May 18, 2017 9:23 am

attached MSL log with tooth logger running. Well, if i did it right that is.

file too big. Tried a shorter log.
Attachments
2017-05-18_12.21.47.csv
(28.01 KiB) Downloaded 5 times
2017-05-18_11.24.09.msl
(57.34 KiB) Downloaded 4 times
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Re: sequential no start on GM. 3.57 / 1.5.0 / MS3X

Postby TheMU47 » Thu May 18, 2017 9:25 am

that's odd. I just checked the log and its showing no rpm, but the gauge on dash mode shows 300ish rpm.
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Re: sequential no start on GM. 3.57 / 1.5.0 / MS3X

Postby billr » Thu May 18, 2017 11:44 am

Was the engine cranking during that MSL? The "battery voltage" never dropped, that always happens when the engine is cranking. What kind of CKP sensor (VR or Hall), and how do you have the pots for it set? Counting the tooth offset physically can (and often, for me) get confusing. Rely only on the timing light to set the tooth #1 offset. You are going to want a light anyway, to confirm timing is OK all the way through the rpm range and other troubleshooting procedures.
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Re: sequential no start on GM. 3.57 / 1.5.0 / MS3X

Postby TheMU47 » Thu May 18, 2017 12:14 pm

yes, it was cranking. I had a battery charger on it.

VR crank sensor (two wire) on 60-2
I don't know what you mean by "pots"

ok, I'll pick up a timing light this weekend.
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Re: sequential no start on GM. 3.57 / 1.5.0 / MS3X

Postby TheMU47 » Thu May 18, 2017 12:24 pm

here's another MSL file. I hope this helps. Shows RPM anyway
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2017-05-18_15.21.41.msl
(83.66 KiB) Downloaded 4 times
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Re: sequential no start on GM. 3.57 / 1.5.0 / MS3X

Postby whittlebeast » Thu May 18, 2017 12:33 pm

The code is not set up correctly to match the signal that the crank/crank sensor is sending.
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Re: sequential no start on GM. 3.57 / 1.5.0 / MS3X

Postby TheMU47 » Thu May 18, 2017 12:39 pm

so you see something wrong? excellent. Steer me in the right direction please.
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Re: sequential no start on GM. 3.57 / 1.5.0 / MS3X

Postby whittlebeast » Thu May 18, 2017 12:55 pm

What I am seeing is a repeating lost sync error. I do not know the specifics of your motor.
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Re: sequential no start on GM. 3.57 / 1.5.0 / MS3X

Postby TheMU47 » Thu May 18, 2017 12:59 pm

I know some of the specifics of the engine. This is a 2007 Chevy Cobalt SS LSJ (supercharged 2.0L) engine.

right now I have it on semi-sequential, so cam signal (gm 4x) should not be in use right now. I could switch back to full sequential. Unless you mean something else is out of sync.
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Re: sequential no start on GM. 3.57 / 1.5.0 / MS3X

Postby billr » Thu May 18, 2017 2:07 pm

"The code is not set up correctly to match the signal that the crank/crank sensor is sending."

I'm confused by that. The OP says it is a 60-2 wheel (58X?), and that is what is set in TS; with wasted COP. That is certainly in the FW code.

OP, was the battery charger still there for the most recent log? Just curious, because that recent one clearly shows cranking and a whole lot of sync loss. There is no surprise about the sync loss if you have no clue what the "pots" are. On the mainboard are two potentiometers, R52 and R56, that have a little screw to adjust them. For a VR CKP sensor those pot screws should be turned CCW until you feel o hear a "clicking" from inside them. Seven turns should be enough, but I tend to go 15-20, more turns won't hurt anything as that "click" is a little clutch that releases when the pot hits the end of its range. Obviously, the manual explain all this better.
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Re: sequential no start on GM. 3.57 / 1.5.0 / MS3X

Postby TheMU47 » Fri May 19, 2017 7:19 am

the last log did not have the charger hooked up. Should see voltage drop.

I had no idea about the potentiometers on the main board. I'll pull the box and turn them CCW.
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Re: sequential no start on GM. 3.57 / 1.5.0 / MS3X

Postby TheMU47 » Fri May 19, 2017 8:10 am

new MSL file. no battery charger. Pots turned CCW
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2017-05-19_11.10.06.msl
(81.27 KiB) Downloaded 4 times
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Re: sequential no start on GM. 3.57 / 1.5.0 / MS3X

Postby billr » Fri May 19, 2017 10:31 am

Post a tooth log, now that the pots are set full CCW. Both the MAT and TPS are looking strange, and both are on the 5V ref, so real soon we will need to dig into that. But right now I want to see if you now have a decent CKP signal.
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