NOOB Harley V-twin No Spark

Post by **jsmcortina** » Mon Mar 20, 2017 6:30 am

Find out if you are losing RPM-sync first. If you don't have a stable tach signal nothing else will work correctly.

James

mjhillen · Post by **mjhillen** » Mon Mar 20, 2017 6:40 am

The MAP is NOT showing upin the composition logger but it does show up on the gauge cluster.

rickb794 · Post by **rickb794** » Mon Mar 20, 2017 6:59 am

You can put paint marks on the alternator rotor and primary inner cover, put them where you can see them through the inspection cover.

Use one dot on the rotor for front TDC and 2 dots on rotor for rear TDC.

Then you can use a timing light to see what is happening.

mjhillen · Post by **mjhillen** » Mon Mar 20, 2017 7:21 am

rickb794 wrote:You can put paint marks on the alternator rotor and primary inner cover, put them where you can see them through the inspection cover.

Use one dot on the rotor for front TDC and 2 dots on rotor for rear TDC.

Then you can use a timing light to see what is happening.

i will do that tonight.

any thoughts on why i get 2 sparks on cyl 1per cycle and only 1 spark on cyl 2? its not waste spark, it doesnt correlate to either cylinder. its 2 sparks in rapid succession.
cyl 2 doesnt do that.

mjhillen · Post by **mjhillen** » Mon Mar 20, 2017 8:49 am

When i pull the plug wires and put spark testers on them, #1 cylinder has 2 concurrent sparks, cylinder #2 only has one. It is not a waste spark as the timing is not correct to be that. 2 rapid sparks on cyl1 followed by a single spark on cyl2.
Correct me if im wrong but front cyl is #1, right? I know i read that somewhere but that would definitely throw timing off.

mjhillen · Post by **mjhillen** » Mon Mar 20, 2017 3:04 pm

Cylinder #1 is front? Not in Harley's ECM, Its the rear. Anyone weigh in on this?

Post by **jsmcortina** » Mon Mar 20, 2017 3:11 pm

mjhillen wrote:Cylinder #1 is front?

That's what the manual says yes.

James

mjhillen · Post by **mjhillen** » Mon Mar 20, 2017 5:29 pm

jsmcortina wrote:
mjhillen wrote:Cylinder #1 is front?
That's what the manual says yes.

James

Just covering all the bases, start with simple first

Here is a datalog.

mjhillen · Post by **mjhillen** » Mon Mar 20, 2017 5:37 pm

additional data log.

hybrid · Post by **hybrid** » Mon Mar 20, 2017 6:09 pm

No O2 sensor? Is your TPS hooked up?

mjhillen · Post by **mjhillen** » Mon Mar 20, 2017 6:12 pm

both are functional

hybrid · Post by **hybrid** » Mon Mar 20, 2017 7:33 pm

AFR seems to be pegged at 19.9

mjhillen · Post by **mjhillen** » Mon Mar 20, 2017 7:35 pm

Not firing the injectors, trying to log so we can figure out the ignition timing issue.

mjhillen · Post by **mjhillen** » Tue Mar 21, 2017 7:12 am

Well, I went thru all of my ignition wiring last night. Everything is correct. I'm not very experienced with this software but the only thing i noticed in the data-log is the fluctuation of the map sensor. I will replace it and see if that goes away. Tried to check timing on the stator last night. Far too messy, too much oil slinging off the chain to get any good info.

Any new ideas? Looks like i will miss the first race of the season so i may build a twin trigger on the camshaft if i cant get it to operate any other way.

mjhillen · Post by **mjhillen** » Tue Mar 21, 2017 9:39 am

Any opinions on the data log yet?

hybrid · Post by **hybrid** » Tue Mar 21, 2017 2:17 pm

That kind of data log is not really good for chasing ignition timing issues.

mjhillen · Post by **mjhillen** » Tue Mar 21, 2017 2:19 pm

What type would be better?

hybrid · Post by **hybrid** » Tue Mar 21, 2017 2:43 pm

I guess a tooth log - although I'm not experienced with oddfire engines.

mjhillen · Post by **mjhillen** » Tue Mar 21, 2017 3:21 pm

mjhillen wrote:Crank signal looks messy, smoothing doesnt seem to help at all.
Checked sensor, clean, have .030 clearance between teeth...I need you guys!

page 1

mjhillen · Post by **mjhillen** » Tue Mar 21, 2017 3:22 pm

right now it looks like the rear cylinder is firing 80* advance Havent checked front yet

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NOOB Harley V-twin No Spark

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