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Car Hesitates at 3k, and sputters at 6.5k-7k (w/logs) help

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NvDiS

10+ Year Contributor
144
1
Nov 25, 2010
Miami, Florida
Well I tried doing some research i found some threads with similar problems but didn't really resolve mine. Here the story...

Need help..no one on tuners responded

i recently upgraded from an evo 3 16G to a holset. the car was tuned with the 16g and made 370whp drivebilty and WOT were perfect no issues. So i pulled it all apart and added some upgrades, since march when i parked the car heres a list of the things ive added:

Hoslet HX35 7-blade
Ported Evo 3 mani w/38mm tial
BNIB fuellab AFPR Hesitates
BNIB fuellab Filter kit
Fuelpump rewire

well all said and done get it all hooked up and start driving the car around. (fuel pressure is currently set to 50psi). Well first thing i notice while climbing the rpm in city driving at EXACTLY 3k the car has a slight hesitation and car completely leans out but then goes back to normal at 3.1k rpm weird, Things we changed trying to diagnose the problem:

BNIB Bosh spark plug wires
BNIB NGK BR8es
Coil pack

We gapped the plugs at first to .22, went for a cruise again and the issue remained.

So on to WOT,still on the .22 gap, gunning the car at 2800-3k there is no hesitation , pulls through the power band really nice at 26-27psi, at about 5500 there feels like a spark blow out, then goes away and returns at 6.5k through 7k , boost never falls and fuel is perfect at 11.3.

So i proceed to lower the gap to .20 then go for a pull lower the boost to 24-25 psi, the problem is now starting at 6.8k thru 7k so its not really fixed

so Im stumped im scared to start throwing money at the wrong things

Ive only changed the parts listed above and after first start-up with the new turbo the car just idle like crap like the original tune was just gone. But its was later fixed
and idle good again...,

i dont know what else it can be

yes im on E85s

WOT starts at 115 sec


log 4/27/13 is cruising


log 5/8/13 is WOT (2nd gear)(i know should have been 3rd not enough room for it still same symptoms)

here a short video of the WOT pull (probably pointless)

[ame=http://youtu.be/vJvMQeE3bT4]spool and pull - YouTube[/ame]
 

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For the hesitation at 3k, try raising your Base Tip-In adjustment. Try setting all the sliders to 30 and see if that helps.

That may also help your hesitation at higher RPM, but that could very well be related to your tune.
 
Bump still having the issue

Went with BR8ES gap to .22 and still there

Got a new coil coming monday

Only other issue I got is a small exhaust leak between the o2 housing and the downpipe. ..but I can't imagine that affecting anything
 
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