Misfire at wot, tried everything please help me.
04-08-2011, 11:59 AM
#51
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Location: ruckersville, va, usa
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Re: Misfire at wot, tried everything please help me.
X2 dont it it!!
You dont want to rev the head past a certain point with vtec not turning on. Im not sure what that rpm is in a D series but in a b series you dont want to go past 6500 rpm as the vtec cam rocker can float on the LMA's and cause valvetrain damage. Again not sure what the limit would be on a D series
04-08-2011, 12:29 PM
#53
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Re: Misfire at wot, tried everything please help me.
04-14-2011, 07:10 AM
#54
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Re: Misfire at wot, tried everything please help me.
Update: Parts will be arriving in the next couple of days... Lets just hope for the best. Ill update this. 
04-21-2011, 04:20 PM
#57
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Re: Misfire at wot, tried everything please help me.
OKKKKKKKKKKKKK!!!!!!!!!!!!!!! WHERE TO START!??!???
Thanks to god, thanks to you and thanks to everything in this world!!!! I COULD FINISH THIS GODDAMN CAR!!!! IM SO HAPPY, i cant write properly....
If someone wants to know what the fix was... I REALLY DONT KNOW LOL...
Ive changed all this together...
Battery ground wire.
Spark plugs (just as you MAN SAID) range 8.. gapped to .025.
Spark plug wires...
ITS ****ING WORKED!!!!
It dynoed 250whp and 290hp.. which is not bad for a z6 with a log manifold and a 2.5 exhaust!!! IM SO HAPPY its a beast!!! really... I will post videos, pics and dyno sheets during the weekend!!!
HAPPY HAPPY EASTER TO ALL OF YOU!!!!!!
AND THANKS TO EVERYONEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE!!!!!!! !
Thanks to god, thanks to you and thanks to everything in this world!!!! I COULD FINISH THIS GODDAMN CAR!!!! IM SO HAPPY, i cant write properly....
If someone wants to know what the fix was... I REALLY DONT KNOW LOL...
Ive changed all this together...
Battery ground wire.
Spark plugs (just as you MAN SAID) range 8.. gapped to .025.
Spark plug wires...
ITS ****ING WORKED!!!!
It dynoed 250whp and 290hp.. which is not bad for a z6 with a log manifold and a 2.5 exhaust!!! IM SO HAPPY its a beast!!! really... I will post videos, pics and dyno sheets during the weekend!!!
HAPPY HAPPY EASTER TO ALL OF YOU!!!!!!
AND THANKS TO EVERYONEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE!!!!!!! !
04-21-2011, 06:41 PM
#60
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Re: Misfire at wot, tried everything please help me.
04-24-2011, 12:55 PM
#61
Honda-Tech Member
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Re: Misfire at wot, tried everything please help me.
I made a video guy.. i hope you like it.. its a 20 minute long video and it justs shows 2% of all the troubles i had... but anyways, i think it turned out nice... plus you have the dyno etc. etc.
Fyi, the turbo didnt hold 16 psi, it went up to 15 falling to 13 at red line.
http://www.vimeo.com/22789418
Fyi, the turbo didnt hold 16 psi, it went up to 15 falling to 13 at red line.
http://www.vimeo.com/22789418
07-31-2017, 12:39 PM
#62
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Re: Misfire at wot, tried everything please help me.
Haha, trust me I know all about chasing these kinds of problems. I really am just throwing out an educated guess at this point. I've seen ECUs do some weird ****, see below.
My first thoughts were the same as yours. Plugs too wide, coil/ignitor going bad, etcetcetc. You've covered everything ignition, and it's probably an ignition problem if you're getting the "fuel cut" feeling. Lean breakup is the only other thing that could be happening, but if you're getting a good readout on the wideband I'd say that's probably out. The only thing that could be possible would be that one of the injectors is messed up and you're getting a lean fire in one cylinder. How do the plugs look?
This car should have no issues at the boost levels, even if the injectors might be on the edge at 18psi (assuming you're running no smaller than a standard 50trim that is).
My daily driver drove fine for 6 months after I bought it aside from some random misfires and hiccups. I went to inspect it, couldn't get the OBD2 port to read. Found out that half of the ECU had been completely destroyed by water damage, and yet the car still ran fairly well. Amazing how well the car ran after dropping in a good ECU, considering I really had no complaints beforehand. Just a small bit of damage to the ECU and it could easily f up timing output. We all know how these ECUs jump from car to car to car and even the ones we get from Hondata are not new. Never know.
My first thoughts were the same as yours. Plugs too wide, coil/ignitor going bad, etcetcetc. You've covered everything ignition, and it's probably an ignition problem if you're getting the "fuel cut" feeling. Lean breakup is the only other thing that could be happening, but if you're getting a good readout on the wideband I'd say that's probably out. The only thing that could be possible would be that one of the injectors is messed up and you're getting a lean fire in one cylinder. How do the plugs look?
This car should have no issues at the boost levels, even if the injectors might be on the edge at 18psi (assuming you're running no smaller than a standard 50trim that is).
My daily driver drove fine for 6 months after I bought it aside from some random misfires and hiccups. I went to inspect it, couldn't get the OBD2 port to read. Found out that half of the ECU had been completely destroyed by water damage, and yet the car still ran fairly well. Amazing how well the car ran after dropping in a good ECU, considering I really had no complaints beforehand. Just a small bit of damage to the ECU and it could easily f up timing output. We all know how these ECUs jump from car to car to car and even the ones we get from Hondata are not new. Never know.
https://honda-tech.com/forums/forced...ngine-3303864/
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Last edited by TheShodan; 07-31-2017 at 03:22 PM.
07-31-2017, 03:23 PM
#63
Re: Misfire at wot, tried everything please help me.
can you look at my thread and tell me what u think?
https://honda-tech.com/forums/forced...ngine-3303864/
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https://honda-tech.com/forums/forced...ngine-3303864/
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