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Help me troubleshoot this

Help me troubleshoot this

Postby 1gSE » Sat Jul 23, 2011 8:00 am

Ok, I noticed this happening after I installed the plasma booster. Its hooked up correctly (at least I assume it is since all 3 lights are on, I followed the lexus wiring diagram that I found online) Ok...now about the video, yes it's hilarious but its the only video I knew about that sounded like it lol. But back on subject, pay attention to 1:39..thats exactly what my car is doing just before redline, but not all the time. I thought maybe it was ignition cut...its not. I do believe I'm getting fuel cut, but at lower rpm, or maybe thats just timing being pulled (both knock sensors are done) I have new knock sensors (gm) on the way, along with a new fuel filter and i'll also be putting in the ik22. So anyone got any ideas? Bad plasma booster?


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Re: Help me troubleshoot this

Postby GzNutz » Sun Jul 24, 2011 7:16 pm

Great vid. "Yeah, I'm racing right now."
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Re: Help me troubleshoot this

Postby Gregtrd » Sun Jul 24, 2011 7:48 pm

Disconnect the plasma booster and see if the problem goes away.
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Re: Help me troubleshoot this

Postby 1gSE » Mon Jul 25, 2011 5:25 am

Its definitely the plasma booster. Disconnected it and didn't have the problem during repeated WOT pulls
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Re: Help me troubleshoot this

Postby trd4life » Fri Jul 29, 2011 10:41 am

I have been doing research i cant seem to figure out how the plasma booster could cause this condition .
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Re: Help me troubleshoot this

Postby trd4life » Fri Jul 29, 2011 10:43 am

i've got the same plasma booster on trents car and i connected and disconnected it several times during dyno pulls and it lost whp every time i disconnected it.
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Re: Help me troubleshoot this

Postby 1gSE » Fri Jul 29, 2011 12:26 pm

I don't know what else it be. Its not doing it at all now. I'm gonna try reconnecting it after the new knock sensors, plugs, wires, and re-wire the fic.
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Re: Help me troubleshoot this

Postby 1gSE » Sat Aug 06, 2011 5:30 pm

Ok I reconnected it and made of video of it. Listen to the exhaust note at 3 and 9 seconds. You can hear it like brbrbrbrbrbrbrbrbrbr. Lol at least thats how i think you would type it out. You can hear it better with earphones

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Re: Help me troubleshoot this

Postby GzNutz » Mon Aug 08, 2011 1:43 pm

It almost sounds like sputtering to me. Your lara doesn't jerk at all when it happens? Just feels like a loss in power. A quick search over on the msd forum yielded these possible culprits: spark plugs or spark plug wires.
Here are the links, hope they help.
http://www.msdignition.com/forum/showthread.php?t=163
http://www.msdignition.com/forum/showthread.php?t=177
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Re: Help me troubleshoot this

Postby 1gSE » Mon Aug 08, 2011 1:58 pm

Thanks, its exactly how he described in the first link, happens around 5k for me. Tried it out again today...ran fine. Im still waiting on parts before I go and replace the plugs and wires. If that doesn't fix it, I guess I'll replace the coils next
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Re: Help me troubleshoot this

Postby 1gSE » Wed Aug 17, 2011 6:30 pm

Well I think I got it...water injection and a combination of running stupid rich. After I re-tuned, the car decided to start dumping in a ton of extra fuel. I was at a solid 11.5 to 11.8 afr and now its dropping to 10.5 with the sputtering on the top end. So tomorrow I'm going to lean it out and try again since I didnt have a problem before the knock sensor code and being extra rich. I did a run with a wire disconnected from the pressure switch so the pump wouldn't come on and it ran fine...reconnected it and got the sputtering, disconnected it and it was good to go. Glad I figured it out because I was on the verge on spending some unnecessary money
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Re: Help me troubleshoot this

Postby 1gSE » Thu Aug 18, 2011 2:55 pm

OK.....so its NOT the meth kit. I ended up leaning out the afr, the connected the kit (100% water) it started sputtering, took out some more fuel and nothing. I switched to the smaller nozzle, it seemed to do it less, it was intermittent on the way to redline. I disconnected and right at 6k rpm it happened again. So now I'm just gonna stop trying to find the problem and just order some new coils and replace everything. What I dont understand is the lean condition when it happens. Im wondering if it could possibly be an injector. I might just order those too....
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Re: Help me troubleshoot this

Postby 1gSE » Wed Aug 31, 2011 6:16 am

looks like it was a bad coil. Got the new set today and put them in and it was fine after multiple pulls with water/alcohol. Gonna put the big nozzle back in and tweak my alcohol map some more
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Re: Help me troubleshoot this

Postby Brandoe91 » Wed Aug 31, 2011 7:25 pm

Good to see that you figured it out.

1gSE wrote:looks like it was a bad coil. Got the new set today and put them in and it was fine after multiple pulls with water/alcohol. Gonna put the big nozzle back in and tweak my alcohol map some more
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