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Post by dickyh on Oct 29, 2015 18:56:46 GMT -5
So as many of you know I put a new engine in my scoot recently and it has a fuel injection system (ecotrons) on it.
The last few days I've been getting sputtering on acceleration and once in a while when moving up in traffic, with little to no throttle and stopping the engine will die. but it will restart no problem.
up until now it was only on initial throttle and it would run fine.
It idles fine at about 1700rpm, but sometimes it goes right to 1700 and other times it will start at about 800 rpm and gradually climb up within about 10 seconds.
I live in Florida and we have ethanol in the gas 10% and I always use premium gas and name brands.
Today it got particularly bad after driving to work this morning (ran fine but the roads were wet after a heavy rain). On the way home it would run but sputtered on throttle from every stop light and dying more than usual.
Up until now I have had no problems with the fuel injection, so I am stumped as to what might be going on and of course no mechanic around to service the fuel injection, so like with everything else, I am left to my own devices...
I've read plenty about sputtering and most of what I read pertains to carburetors being dirty, jetting issues and so on (generally fuel issues)... Is it possible that the injector is dirty?
Any input would be greatly appreciated. and as always thanks for your time.
On another note, I've been burning more gas than normal... Related?
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Post by rcq92130 on Oct 29, 2015 19:14:56 GMT -5
How good is the gas filter? With EFI yuo need to have a great filter, since the orifice in the injector is very small and is easily clogged.
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Post by dickyh on Oct 29, 2015 19:21:06 GMT -5
I have a good filter on there, but honestly it's been about 6 months since I've changed it.
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Post by crawford on Oct 30, 2015 9:14:37 GMT -5
Just thinking maybe got some bad gas like water in tank now?
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Post by dickyh on Oct 30, 2015 16:41:24 GMT -5
Now I think that maybe my exhaust is the culprit... ever since i've put a performance exhaust on this scoot, it seems to come loose at the engine and causes this issue and some backfiring. What I don't understand however, and am hoping someone can fill me in is as to why this causes the issue. it seems that if I remove the exhaust pipe and re-seat it is fine until it comes loose again.
since this is EXHAUST how is it that it affects performance??? I could understand if I had an air leak on the intake but am confused... I'm not an engine guy so I'm not that well versed on it...
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Post by scooter on Oct 31, 2015 2:07:22 GMT -5
Now I think that maybe my exhaust is the culprit... ever since i've put a performance exhaust on this scoot, it seems to come loose at the engine and causes this issue and some backfiring. What I don't understand however, and am hoping someone can fill me in is as to why this causes the issue. it seems that if I remove the exhaust pipe and re-seat it is fine until it comes loose again. since this is EXHAUST how is it that it affects performance??? I could understand if I had an air leak on the intake but am confused... I'm not an engine guy so I'm not that well versed on it... maybe put lock washers on them |
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Post by dickyh on Oct 31, 2015 6:48:50 GMT -5
well, the exhaust issue didn't seem to cure the problem.
I've put on a new fuel filter, rechecked everything for leaks and it didn't help. just before I called it a night I pulled the boot off of the spark plug and it is very rusted inside, to the extent there was a spring inside that disintegrated in my hand. It is a so-called performance coil and I have the stock as a back up so I'm going to change it this morning and see if it fixes the issue.
on another note... I pulled the exhaust off and it was visibly leaking as it had black soot around the outside of the hole. so I'm sure this was part of the problem. I changed the gasket and put on a new one.
I also increased the air mixture on the throttle body increasing the RPMS to about 1900 and it seems to help, but was getting late and didn't focus too much on it, so I'll address this as well. My question is that if it is too high and is this an issue from something else?
and back to the exhaust... I have a question about it as it is a performance exhaust... does it need more air in the fuel mixture since it is so much bigger than the stock one? Since, I've put this on about 8 months ago, the scoot intermittently back-fires and pops on deceleration from mid throttle.
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Post by cyborg on Oct 31, 2015 8:18:15 GMT -5
my call is the intake airflow needs to be increased and the fuel injection needs to be bumped up to compensate for the exhaust ,and i would be giving all the conections for the injection and ignition to see if the plugs worked loose or have corrosion ,,that may be the culprit as well
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Post by dickyh on Oct 31, 2015 8:27:15 GMT -5
OK, So I'm totally stumped... I've checked everything I know and still having the same problem. air flow doesn't work or works temporally... changed the coil - pulled the entire fuel injection system apart and checked everything and put back together.no luck. still bogs and sputters on throttle and wants to die after releasing the throttle.
I recorded some data and sent to ecotrons, so hopefully they can give some insight.
One other questions is - water in the fuel? how do you tell and would this be causing the problems? and how to fix it?
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Post by cyborg on Oct 31, 2015 8:41:13 GMT -5
drain the tank fill it with fresh,,,,put in an ounce or two of drygas,,,auto parts stores sell it,,,very common problem where water gets in the tank either by real heavy dew or riding/driving in the rain alot,,,i also would check the battery and all ground strap mounting points,,,i think its electrical,,,and the low rpm vibrations are moving something so it stalls
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Post by dickyh on Oct 31, 2015 8:44:35 GMT -5
drain the tank fill it with fresh,,,,put in an ounce or two of drygas,,,auto parts stores sell it,,,very common problem where water gets in the tank either by real heavy dew or riding/driving in the rain alot,,,i also would check the battery and all ground strap mounting points,,,i think its electrical,,,and the low rpm vibrations are moving something so it stalls i've checked all electrical all is fine. I dont want to drain the tank if i dont have to... how to tell if there is actually water in the tank??? |
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Post by cyborg on Oct 31, 2015 8:47:20 GMT -5
spark plug may be on it's way out too,,i've had maddening problems with them,,,and fairly new ones too,,,look great spark on the engine fine ,,,changed them problem went away
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Post by dickyh on Oct 31, 2015 8:48:31 GMT -5
spark plug may be on it's way out too,,i've had maddening problems with them,,,and fairly new ones too,,,look great spark on the engine fine ,,,changed them problem went away brand new plug as well |
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Post by dickyh on Nov 2, 2015 6:26:46 GMT -5
after spending the entire weekend trying to figure out the problem, ecotrons replied to my sending them data and it appears the ECU is bad and they are sending out a new one as they said it isnt collecting IAC, ECT or battery voltage readings.
I was about ready to pull the fuel injection off and put on a carb. so frustrating. just put on a new engine and now this... Always something.
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Post by cyborg on Nov 2, 2015 9:07:05 GMT -5
thats very nice of them to stand up and send you a new one,,,,,the mark of a good company
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