Stutter at 6k

[92GVR4#5]

So i thought that this stutter may have been caused by the blown turbo, but i just installed a good condition 14b with little to no shaft play, and i still get this stutter at approximately 6000 rpm's. Checked the plugs, one was pretty shitty looking (detonation maybe?), so i installed 4 new plugs and i still have this damn stutter. Any ideas?

 

[bacalhau16]

What are you fuel and tuning modifications? Whats your setup?

 

[92GVR4#5]

Fuel:
560cc
255
aeromotive afpr

Tuning
Safc

Set-up:
14b stock
fmic with all hard piping
3'' turbo back exhaust
crushed 1g bov
built bottom end


Thats the basics

 

[whiteflash]

what kind of plugs did you put in?

 

[marsh63]

sounds like fuel cut to me. do you have anything to read your air fuel ratio?

 

[92GVR4#5]

I have an Aem Wideband in it. It had a brand new set of ngk's, and now theres just a set of autolites. Does the same with both plugs.

 

[92GVR4#5]

Any ideas?

 

[bastarddsm]

plug wires..

 

[whiteflash]

I had the same problem, so i switched to ngk bpr7es spark plugs. what boost are you running?

 

[silver bullit]

I had the same problem, so i switched to ngk bpr7es spark plugs. what boost are you running?

X2

How much boost you pushing?

 

[cruisintalonawd]

checks your plug wires to see if they are cut or spliced some where

 

[blownturbotsi]

Change back to NGK's, stat!

 

[GRAVEDIGGER]

Replace your spark plug wires. I bet that is your problem. You can check the resistance to see if they are all within the same range. This will usually show considerably higher resistance on the bad wire. That's just what I would do if it was mine.

 

[CJTurbo]

Magnecor wires? I had a similar problem. Check the resistance in the wires.

 

[92GVR4#5]

plug wires..

has a cop set-up, but i tried swithing it out to a set of wires and factory coil pack and it did the same thing

 

[92GVR4#5]

X2

How much boost you pushing?

when i had the 16g i was pushing 22, now i have a 14b on it and am only running about 12 daily.

 

[92GVR4#5]

Change back to NGK's, stat!

...i will trust me. Only reason i put autolites in was that was the only thing i had at the shop and parts places were closed. When i pulled the ngk's out, the one plug was like melted on the electrodes so it had a HUGE gap to jump.

 

[92GVR4#5]

so, i replaced the coolant temp sensor and plugs. The car is still acting up. Any other ideas?

 

[BOC Jason]

I would check for vacuum leaks.
Just my $0.02

 

[meliketoball]

I would check for vacuum leaks.
Just my $0.02

x2 maybe up your plugs to 7es's.