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Old 05-14-2003, 02:30 PM   #1
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I have the mugen MR12 and for some reason when i go full throttle down the road the engine starts to slow down and then die. Any one got any idea why? the temp is normal.

the motor seems fine. i start it back up and everything seems normal. only when i go full speed for more than a few seconds. the only thing i can think of is bubbles in the fuel line. i did put in a fuel filter the other day. and this is the first time i've gone full throttle like that since the fuel filter. could that be it?

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Old 05-14-2003, 02:49 PM   #2
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If it seems like its starving at WOT, then its probably too lean on the HSN. Try richening it up alittle and see if it helps.
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Old 05-14-2003, 06:12 PM   #3
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take the fuel filter off there not really good!
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Old 05-14-2003, 08:22 PM   #4
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Quote:
Originally posted by rrgt_kid
take the fuel filter off there not really good!
really? someone told me never to run it without one. i ran it several times without it and it didn't seem to hurt. tomorrow i will take it off and see what happens. thanx for the help
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Old 05-14-2003, 09:10 PM   #5
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My S1 JP did the same with the fuel filter. Just take it off

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Old 05-15-2003, 12:09 AM   #6
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take the fuel filter off and run Trinity 30% fuel worked for me.
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Old 05-15-2003, 12:18 AM   #7
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rip off the fuel filter. You should be fine
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Old 05-15-2003, 01:12 AM   #8
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I still believe that I would still think about richening your high end needle settings.

If you have a properly designed fuel filter, it would not be the cause of this. There are filters that don't work properly, but that is relatively rare.

You have the sullivan filter (I think I remember), and it should not be causing a problem. However, if you take it off, have no problems, then it was poorly manufactured... but if you still have the problem, then you know the filter was not the problem, and I would suggest tha you put it back in, unless you have a fuel tank that has a built-in filter, then there is not much reason to have another filter.
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Old 05-15-2003, 06:40 AM   #9
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Quote:
Originally posted by Im2lazy
I still believe that I would still think about richening your high end needle settings.

If you have a properly designed fuel filter, it would not be the cause of this. There are filters that don't work properly, but that is relatively rare.

You have the sullivan filter (I think I remember), and it should not be causing a problem. However, if you take it off, have no problems, then it was poorly manufactured... but if you still have the problem, then you know the filter was not the problem, and I would suggest tha you put it back in, unless you have a fuel tank that has a built-in filter, then there is not much reason to have another filter.
I am going to take the filter off today and see what happens. if it still happens i'll richen it up. i'll post the results later today.
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Old 05-15-2003, 04:18 PM   #10
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ok, i took the fuel filter off and it still happened. so what i did was let it warm up for a few minutes and richened it up just an 1/8 of a turn. doesnt seem to be any more problems
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Old 05-16-2003, 09:30 AM   #11
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richen it up a little more then it needs and it will never die on you at top end because i had the same prob with my car i run a filter and trinity 30% in my car all the time and never had a prob with it
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Old 05-16-2003, 01:55 PM   #12
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cool, thanx for the advice
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