Engine won't start

General support questions and announcements for MS3. See also MS3 manuals.

Moderators: jsmcortina, muythaibxr

Engine won't start

Postby James » Thu Dec 28, 2017 5:06 am

Hi all,


Engine ran fine a couple of months ago. It's got colder here — but I don't think that's entirely it.

It just doesn't catch — I get the odd backfire when I switch the ignition off.

Attached are the MSQ and MSLs from today.


James
Attachments
triumph2000_20171228.msq
(182.4 KiB) Downloaded 8 times
2017-12-28_11.39.34.msl
(66.5 KiB) Downloaded 8 times
2017-12-28_11.36.35.msl
(302.94 KiB) Downloaded 7 times
Triumph 2000 Mk1 — 2 litre straight 6 — MS3+MS3X, 36-1, wasted spark — Install Details
Triumph Spitfire Mk3 — clockwork
Twitter
James
Experienced MS/Extra'er
 
Posts: 259
Joined: Sun Apr 04, 2010 12:04 pm
Location: London, England

Re: Engine won't start

Postby Matt Cramer » Thu Dec 28, 2017 7:39 am

Something's wrong with the crank sensor input. Can you get a tooth log of an attempted start?
Matt Cramer
Super MS/Extra'er
 
Posts: 13736
Joined: Thu Apr 16, 2009 8:08 pm

Re: Engine won't start

Postby James » Thu Dec 28, 2017 7:58 am

Hi Matt,


See attached.


James
Attachments
2017-12-28_14.54.21.csv
(47.71 KiB) Downloaded 5 times
2017-12-28_14.53.38.csv
(27.75 KiB) Downloaded 4 times
Triumph 2000 Mk1 — 2 litre straight 6 — MS3+MS3X, 36-1, wasted spark — Install Details
Triumph Spitfire Mk3 — clockwork
Twitter
James
Experienced MS/Extra'er
 
Posts: 259
Joined: Sun Apr 04, 2010 12:04 pm
Location: London, England

Re: Engine won't start

Postby Matt Cramer » Thu Dec 28, 2017 9:03 am

It's missing a lot more teeth than the missing teeth. Try a tighter sensor gap, or adjusting the VR trim pots.
Matt Cramer
Super MS/Extra'er
 
Posts: 13736
Joined: Thu Apr 16, 2009 8:08 pm

Re: Engine won't start

Postby James » Sun Jan 14, 2018 4:01 am

HI Matt,


For sure something was up with the sensor and the connector. The crimps on the connector weren't so good, and the plastic on the sensor had gone soft over time so was a bit wobbly. (read — bad crank sensor mount design) So I replaced those, hoping it would be the issue.

Looking at TunerStudio whilst it's cranking it's still not syncing right.

The tooth logger on screen looked much better — but still no starting. I've attached the logs.


James
Attachments
2018-01-14_10.49.48.msl
(576.26 KiB) Downloaded 3 times
2018-01-14_10.51.42.csv
(23.54 KiB) Downloaded 5 times
2018-01-14_10.51.37.csv
(33.17 KiB) Downloaded 4 times
Triumph 2000 Mk1 — 2 litre straight 6 — MS3+MS3X, 36-1, wasted spark — Install Details
Triumph Spitfire Mk3 — clockwork
Twitter
James
Experienced MS/Extra'er
 
Posts: 259
Joined: Sun Apr 04, 2010 12:04 pm
Location: London, England

Re: Engine won't start

Postby James » Mon Jan 15, 2018 5:23 am

Looking at the logs — could it be that the voltage is dropping off and causing the sync error 2?

It goes down to 7V or so.

The battery turns over the engine reasonably ok — but all this attempting to start has had a bit of a toll.
Triumph 2000 Mk1 — 2 litre straight 6 — MS3+MS3X, 36-1, wasted spark — Install Details
Triumph Spitfire Mk3 — clockwork
Twitter
James
Experienced MS/Extra'er
 
Posts: 259
Joined: Sun Apr 04, 2010 12:04 pm
Location: London, England

Re: Engine won't start

Postby Matt Cramer » Mon Jan 15, 2018 8:02 am

There's still a few points where it fails to read a real tooth. More cranking voltage would boost cranking speed, and if this is a VR sensor, more cranking speed gives a stronger signal.
Matt Cramer
Super MS/Extra'er
 
Posts: 13736
Joined: Thu Apr 16, 2009 8:08 pm

Re: Engine won't start

Postby billr » Mon Jan 15, 2018 9:53 am

I gotta admit: I didn't look at the MSL last night, only the CSVs. Your cranking rpm is only about 130, not what I would call "reasonable". Get a good battery in there before looking for other problems. Were you activating the throttle wildly during some of those crankings, or is that TP action logged a separate symptom?
billr
Super MS/Extra'er
 
Posts: 5014
Joined: Sun May 15, 2011 11:41 am
Location: Walnut Creek, Calif. USA

Re: Engine won't start

Postby James » Tue Jan 16, 2018 10:38 am

Matt Cramer wrote:There's still a few points where it fails to read a real tooth. More cranking voltage would boost cranking speed, and if this is a VR sensor, more cranking speed gives a stronger signal.


Yep it's a VR sensor. I'll connect up a jump battery to give it some more juice.
Triumph 2000 Mk1 — 2 litre straight 6 — MS3+MS3X, 36-1, wasted spark — Install Details
Triumph Spitfire Mk3 — clockwork
Twitter
James
Experienced MS/Extra'er
 
Posts: 259
Joined: Sun Apr 04, 2010 12:04 pm
Location: London, England

Re: Engine won't start

Postby James » Tue Jan 16, 2018 10:40 am

billr wrote:I gotta admit: I didn't look at the MSL last night, only the CSVs. Your cranking rpm is only about 130, not what I would call "reasonable". Get a good battery in there before looking for other problems. Were you activating the throttle wildly during some of those crankings, or is that TP action logged a separate symptom?


I'll sort the battery and try again. I did have my foot on the throttle — no idea why! Out of frustration probably :)
Triumph 2000 Mk1 — 2 litre straight 6 — MS3+MS3X, 36-1, wasted spark — Install Details
Triumph Spitfire Mk3 — clockwork
Twitter
James
Experienced MS/Extra'er
 
Posts: 259
Joined: Sun Apr 04, 2010 12:04 pm
Location: London, England


Return to MS3 General Support

Who is online

Users browsing this forum: E4ODnut, Google [Bot] and 2 guests