Surging On Boost

[FAMILY DRIFTER]

Hi guys im new to the place thought i would say hi and hit you up with a problem i got. As i just purchasd my R33 gtst 4 door im new to the owning a skyline but not new about knoledge about them. I went to pick up my car on the weekend and i found a problem with it. When the car comes on boost it hesitates and surges through the rev range like a fuel problem now the fuel pump is new 500HP walbro and the filter is new so is the airflow metre. Im running stock boost and everything is stock can anyone help please i want my baby running fine ASAP

[SXY-33R]

Mine did the same thing FOULED SPARK PLUGS or boost set to high if your running standard boost try option one hope it helps let me know how you go.

[Spunky Munky]

Check your boost - standard without much mods - should be running around 8-11 PSI max in my opinion. With mods, proper boost controller, run max 14 psi.

Get your vehicle tuned and make sure you only run your vehicle with high-octane fuel - I recommend Shell's V-POWER.

Moreover, make sure you warm up your car at all times. Either turn it on and let it idle for around 5 minutes before you drive off or, drive slowly for around 5 minutes and let the engine warm itself up slowly. Never ever cane it when the engine temperature is still cold.

Hope that helps. good luck.

[FAMILY DRIFTER]

Mine did the same thing FOULED SPARK PLUGS or boost set to high if your running standard boost try option one hope it helps let me know how you go.

yeah i will try that are you running stock spark plugs or did u choose a aftermarket performance set and if so what are they what are they like?

[OFENSV]

most likely a spark related problem then a fuel problem. check your plugs, gap to .8mm. may also be your coils which get hairline fractures causing the spark to arc out causing a missfire

[FAMILY DRIFTER]

most likely a spark related problem then a fuel problem. check your plugs, gap to .8mm. may also be your coils which get hairline fractures causing the spark to arc out causing a missfire

will test them sa well do you yhink if the coil packs need replacing it would be better to upgrade to spitfire high performance coilpacks and use a plug with a 1mm gap???

[SXY-33R]

yeah i will try that are you running stock spark plugs or did u choose a aftermarket performance set and if so what are they what are they like?

cant exacly remember what they are but they cost me around $25 each they seemed to do the trick running at 11 PSI all day. think some NKG Iridium

Iridium is a precious, silver-white metal and one of the densest materials found on earth. The natural properties of Iridium offered NGK the opportunity to create one of the world's finest spark plugs. The result are spark plugs that require less voltage to spark, burns fuel more efficiently, sparks at leaner air/fuel mixtures, and delivers higher horsepower and better gas mileage.

NGK IRIDIUM SPARK PLUG ONLY NEED TO REPLACE EVERY 100000 KMS.....

Have you got an after market boost gauge to see higher boost levels if present cause i sent my car in for reapairs once and they must of fu@#ed with the manual boost controller it had, cause it was surgin like a MF when i got it back then realised how high she was boostin with standard ECU (computer)too much boost (boost cut out,a safety thing) any way might be helpful if its not a boost cut issue then i would lean towards electrical?

Edited June 11, 2007 by SXY-33R

[FAMILY DRIFTER]

cant exacly remember what they are but they cost me around $25 each they seemed to do the trick running at 11 PSI all day. think some NKG v spark or something

Have you got an after market boost gauge to see higher boost levels if present cause i sent my car in for reapairs once and they must of fu@#ed with the manual boost controller it had, cause it was surgin like a MF when i got it back then realised how high she was boostin with standard ECU (computer)too much boost (boost cut out,a safety thing) any way might be helpful if its not a boost cut issue then i would lean towards electrical?

eah i got a gauge it sits at .06bar when boosting so i say its spark thanks heaps

[r33madd]

i say check for boost leaks and hose claps are all done up etc.

also try your spark plugs at .8mm gap

[joeyjoejoejuniorshabadoo]

i sent my car in for reapairs once and they must of fu@#ed with the manual boost controller it had, cause it was surgin like a MF when i got it back then realised how high she was boostin

did you check your mileage before and after this visit?