Dan Gielas, Briggs and Stratton 590cc VTwin
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Here are the datalogs from yesterday. Anytime the TPS goes to 100% for a second or so, that means the engine just died and I did that before restarting it. Just as a visual reference in the logs.
It appears the resets don't actually show up in the log, more like it just stops logging and then starts again after its back on. A hiccup in the log if you will.
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Now I have to figure out how to get it running, either by shielding the stock system, or just jumping right into spark control with my own shielded system. I have full intention of moving to spark control very soon, but I wanted to try and get some kind of fuel tuning established before adding spark tuning to the mix.
Any suggestions for DIY shielding? I'm thinking I'll just coil some wire around the plug wires? Ground the shielding or not?
Time to do some 'sperimentin.
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I was looking at the '90 Kawasaki EX250F coils I bought off ebay, and started wondering if they were shielded or not. I'm thinking VTwin bikes in '90 might still have been carbed, so they might not have good wires either! I guess I can play it safe and try to hang the CBR COPs off it instead.
Stupid question alert: which terminal is positive on these coils (if they're even polarized)? I'd like to assume blue=positive, black=ground but I'm not sure.
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Also, I've been contacted via email by a guy in Sweden that's megasquirting an already turboed version of this same engine. He also had nasty noise out of the "lawn mower" ignition and has been running waste-spark COP without issue. Pretty sweet project, I'm going to try and get him to post it up here.
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http://www.msefi.com/viewtopic.php?t=15884
Feels like it won't be much further before its running like a champ. I hope so, like you said, time is definitely running out.
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Swapped the polarity on the coils (+12V to the black terminals on those coils above) and the resets drop from almost constant to once a minute.
Here are two massive logs of it running. First two "runs" since we added spark control, and much better than it ever was on fuel-only.
I'll post a vid of it throwing flames later tonight. Its a tad rich on deccel.
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- MegaSquirt Newbie
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- MegaSquirt Newbie
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Engine runs like more of a dream than it ever did. Obviously it needs to be tuned, but it reset only twice in the span of about an hour, held a rock solid idle and just sounded great.
Megasquirt rocks. I'm pumped up again.