Turbo Lag/Jerking Problem

[TeeWX98GST]

Well, heres the problem, my car starts up and drives fine of course, around town cruising is a walk in the park.. My current mods are Injen Intake, Apexi 3inch Catback, HKS Bov (recirculated to my Injen Intake), SBR Mechanical Boost Controller (14psi), B&M Short Throw Shifter, a Stage 2 racing clutch, light flywheel (fidanza), and thats about it other than some gauges. (I also have aftermarket plugs and wires it looks like from when i got the car, not really sure which ones exactly)

Problem: When on full throttle, once turbo spools to 14psi (about 4-4.5krpm), it likes to kind of lag around and will like pull.. pull.. pull.. pull.. instead of just pulling all the way through with a solid RPM movement its more of like a jerking. I did a few test runs at 14psi and 16psi and when it jerks i noticed i lose some boost then it jumps back up (autometer guage). I'm not really sure what this is, I just got my car put back together and installed my intake and first time driving it in 5 months and first run on the intake and its doing this...

Thanks for all the Help

 

[turbosax2]

Boost leak test and put some NGK BPR6ES spark plugs in.

 

[dSmgs-T]

^^
+1

 

[TeeWX98GST]

Where can I purchase NGK BPR6ES plugs? DSMparts.com only has BPR7ES, BPR8ES, and BPR9ES plugs.. thanks, I think this could be my problem, I have no idea when my plugs were changed last or what they are, gunna try to get these plugs ordered right away.

 

[snowborder714]

If you have a Napa around you, they should have them. If not, try any other local auto parts stores (Advance, Autozone, etc.). Just make sure you ask for them by the part name (BPR6ES) and make sure that matches the printing on the box/spark plugs since there are others that are very close in part name, but not the same. They should be around $2. Then gap them to .028" and put them in.

 

[Cypress_h]

^^ +1