Super Jet epic ignition problems

[briank]

ok, heres what i got. i have a brand new superjet with new electronics and stock flywheel. i also have a 771 bigbore from jetmaniac/blue with stock 38s. i hooked up the epic and i had a hard time starting it, once i got it started after about 20 mins or so i put it in the water and it would stall everytime i hit the throttle. once it stalled it would take a bit to start it again and it would continue to stall out when i hit the throttle. anyone have any idea what the issue can be? some say to change the coil but mine is pretty much brand new. any help would be great, thanks.
Brian
ok, so it wasnt the epic after all. my ski ran like crapolla because of water in my fuel... steve u.k was right, more power more gains and money well spent on a great product.

 

[waterfreak]

seen it !! It happened to mine !

 

[OCD Solutions]

Did it seem at any time like it was running backwards?

 

[briank]

sort of, it was a real pain to start it, once it did i had a hard time keepin it started. and the stalling issue too. i even put my msd back in and its still not runnin right. everytime i hit a jump and let off the throttle it will stall out mid air. i really thought i was gonna be able to plug and play, i didnt think i would have to buy other stuff just to make this work. still dont know what to do about it.

 

[OCD Solutions]

Did it ever kick back on you? Maybe it sheared the woodruff key?

 

[briank]

na, it never did that, but maybe i should check the key anyway just in case.

 

[aramis]

if you put the msd back in and the problem is still the same, then I don't understand how it's an epic ignition problem...?

Is it possible that you are just lean on the low end, because of the extra timing either ignition is giving you? Not sure if that makes sense or not. You mentioned a big bore with stock 38's...did you put the stock 38's on the shortblock, or were the carbs tuned to that engine by the builder? (are they jetted for that engine?)

 

[OCD Solutions]

That's a great question, was it running before you installed the EPIC?

 

[Billybo455]

if it's a jetmaniac motor it should be ready to rock out of the box. the carbs are included in the kit. can you take a picture of the plugs?

 

[briank]

chris modified my carbs to the motor he built for me. i had the msd before the epic and it ran perfect then i put the epic in and it started with the problems so i put the msd back in and it runs great except for the stalling when i let of the throttle issue. it does seem like a fuel problem, but it only started after i put the epic in. ill richen up the bottom screws on my carbs and try that tomorrow, hopefully its something simple like that

 

[Billybo455]

i wouldn't mess with the carbs yet. if it ran great before and all you changed was the ignition i'd look at the plugs first. maybe your idle screw just needs to be adjusted?

 

[ntrsspray]

I built his ski and I rode it before the epic and hats off to Blue/ JetManiac the boat ripped a$$. I agree with the now MSD installed and the carb settings. The water/air temp is much much warmer then when initially tuned. However Specialfx had the same issue recently and it was his coil even though it was a brand new factory Yamaha Coil which I will try in Brians this weekend. Although I was busy Brian used a local shop to install the Epic which I am unfamiliar with their background and Epic's. Stay tuned!!

By the way Brian you owe me a return phone call


Sent from my iPhone using Tapatalk

 

[aramis]

what plugs and what plug boots are you using? the epic being digital will be more susceptible to electrical noise and iffy electronics.

In my experience, the epic can also help highlight some poor tuning too...it's like if their was a tuning issue all along, but it was being masked because you weren't being as demanding on the motor as you are now. Not doubting jetmaniac's tuning at all...just that if the temps are significantly different than when it was tuned it might be as easy as that. However, I'd think that warmer air would make it run richer, not leaner.

 

[briank]

I got stock wires and plug boots, some peeps are saying to change the wires to different ones but don't know which ones to get

 

[QJS]

Don't go buying new parts just yet, I have read through this a couple of times and I really think you have a slightly lean condition because Epic is doing its job. When you say its difficult to start are you priming the carbs or just cranking the engine?
Just a note about Coils....The OEM coils and wires are fine you don't need to change either unless they are faulty. The problem Special FX had was completely different, his problem was in fact a faulty coil but the symptoms were different.
Chris.

 

[special fx]

Don't go buying new parts just yet, I have read through this a couple of times and I really think you have a slightly lean condition because Epic is doing its job. When you say its difficult to start are you priming the carbs or just cranking the engine?
Just a note about Coils....The OEM coils and wires are fine you don't need to change either unless they are faulty. The problem Special FX had was completely different, his problem was in fact a faulty coil but the symptoms were different.
Chris.

Agreed, I had a faulty coil. It did work fine with stock CDI, but that doesn't mean it was "good", it just meant it worked.

 

[briank]

thanks for the help guys, im gonna play around with it this weekend and see what happens. ill keep everyone posted

 

[adubaz7]

any updates on your ski did a new coil fix your problem?
Also Special fx what were the symtoms of your ski before installing a new coil?

 

[special fx]

My problem was little to no spark. It might spark 1 out of 20 revolutions of the crank. If I isolated the EPIC from the electrical box, it would fire perfectly. But, with the EPIC grounded to the box it not fire. With a new coil it fired right up.

Theory is the faulty coil was "leaking" high energy into the box and interfering with the EPIC. A stock CDI worked fine with the coil, but the EPIC is more sensitive to this kind of issue (being digital).

 

[adubaz7]

My problem was little to no spark. It might spark 1 out of 20 revolutions of the crank. If I isolated the EPIC from the electrical box, it would fire perfectly. But, with the EPIC grounded to the box it not fire. With a new coil it fired right up.

Theory is the faulty coil was "leaking" high energy into the box and interfering with the EPIC. A stock CDI worked fine with the coil, but the EPIC is more sensitive to this kind of issue (being digital).

Ok I think I am having a similar issue so I will do some more testing and let others interested know what I find. It seems the factory cdi is very forgiving that is probably why the electronics last for 20 years but man from the looks of the basic pre loded safe maps the gains are going to be huge once I get the bugs worked out of my old as SN.
On a bit of a side note Steve from http://www.canadian-freestyle.com/ has been very helpful in getting me setup with the E.P.I.C. system even though I bought it from a forum member not direct from him he has shown the highest level of customer service he is very good to deal with.