Full boost lose power!!!

NADude98

NADude98

Member
Apr 5, 2006
50
0
6
Terre Haute, IN
www.myspace.com
Help! I have a problem. I was getting on it pretty good the other day and at full boost I felt a strange sensation, like a shudder.

Since then when I get on it when I reach full boost, it like cuts out or sputters and loses a little bit of power. First thing I looked for was vacuum leak, like I had blown off a hose.

Any ideas or places to start troubleshooting would help!!!
 
NADude98

NADude98

Member
Apr 5, 2006
50
0
6
Terre Haute, IN
www.myspace.com
s383mmber1;969419 said:
Are you talking about fuel cut?
Click to expand...

No, this is not fuel cut!!! I am running about 20lbs of boost with Lexus MAF and RC 550's. Also I just changed plugs a week ago, I haven't checked them since but that is why I eliminated them in my mind as the problem. I am running the NGK's that it calls for. The 6's
 
suprahero

suprahero

naughty by nature
Staff member
Aug 26, 2005
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What are they gapped too? With 20psi of boost, you may need them gapped to .028 instead of the .032 they come with. I'd pull them and see if you fouled one out, and make sure everything is grounded good also.
 
7m2bar

7m2bar

11.7s 7MGTE 22psi
Jul 16, 2006
14
0
0
Malta Europe
Id say try a set of 7 heat range iridium NGKs and take it fom there. With 20 psi you should run 1 step colder. I had that problem with 17 psi on an iuprated ct26, changed the plugs and it did the trick.
 
W

wardog

R.G.V WARDOG
Jan 19, 2006
564
0
16
ALTON, TX
Guys I have the same problem too, it sputters at high 5000-6400 rpm. Were do most of you guys get the Ngk 3330s none of the autozones have them here in Houston,tx. I didnt mean to hijack your thread man its just that i have the same problem.:1zhelp:
 
super.secret.supra.club

super.secret.supra.club

Supramania Contributor
Mar 22, 2007
1,304
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San Diego, CA
and i thought i was the only one having this problem. i know for sure that its the plugs for my car. last time i replaced mine, 5 of the six plugs had hair line cracks on them. i was using heat range #6. its ok though. i check them constantly now and replace them once a month to be on the safe side. copper plugs cost me like 10 to 12 dollars at my local autozone.

the feeling that i get is like a spit/sputter at about 4 grand and up. you can feel the car haul ass in 3rd gear until 4 grand. then it just feels like the motor is taking a shit.

ed.d.
 
suprahero

suprahero

naughty by nature
Staff member
Aug 26, 2005
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wardog;971373 said:
Guys I have the same problem too, it sputters at high 5000-6400 rpm. Were do most of you guys get the Ngk 3330s none of the autozones have them here in Houston,tx. I didnt mean to hijack your thread man its just that i have the same problem.:1zhelp:
Click to expand...

Tell your local parts store to order them for you. They'll have them the next day.
 
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