Hits 4500 To 5000 Rpm Than Dies

[blade20034]

on my 1995 r33 i got i changed the plugs put a boost controller on and a plumb back bov all turbo smart items when the car comes on boost its dies and carry s on like shit and surging jerking not sure what i can do boost level is on 8 has fmic and 3" exhaust i have reset the ecu but still nothing it idles fine takes of good but when i hit the rpm range it goes to shit any ideas?

[scotty nm35]

Take it all off?

Understand, each one of those mods has changed the boost level and tune in some way, did you gap the plugs down at least?

Search for R+R, it is the ecu protecting itself from stupidity.

[blade20034]

yep the boost is turned right down and i understand how all that works and all the mods it was doing this before i added all the mods it runs a lot better since i put the boost controller on and yes the plugs have been gapped down

[scotty nm35]

The stock bov vents a little boost back to the intake, so put that back on and see if it gets better.

bypass the boost controller and see if it runs better off wastegate pressure only.

[Ben C34]

Adding stuff will not make thr car run right. You have to get it sorted before you mod it.

[Badgaz]

since when do you have to get it sorted before modding it? why not upgrade when a factory item fails?.....well... i'd put money on a failed coil...test those i reckon.....when you get those working correctly...the next thing you'll be limited by is the AFM....

[blade20034]

well what i can tell some one done a boost mod the line from the turbo went into the intake pipe the over hose blocked of so i connected a boost controler to see if that works and i put a plump back bov on cause i got sick of tired hear this fluttering sound sorry i am new to all of this turbo stuff it is one big learning kerp for me

[Ben C34]

Starting wuth a nice running car is always the best option, I suppose I don't like headd aches.

You should have just plumbed the wastegate directly to control boost.

Edited March 2, 2014 by superben

[Badgaz]

are you typing on a phone....? plum back bov is fine so long as the lines are all connected. when you turn the boost up that sound will get louder by the way.

[Badgaz]

as superben says...connect the wastegate actuator directly to the intake pipe where it would normally go....this will give you factory boost (without the solenoid) messing with boost can be bad...if you don't know what you are doing plumbing the boost controller in then i'd recommend getting someone to help you...like a performance car shop or tuner shop.

[Ben C34]

I agree its likely a coil. There is no sure fire to test them other than to swap with known working ones.

You might get lucky and be able to clean the boots and put in some silcon grease but I doubt it.

[blade20034]

i got the boost controller in fine its just a turbo smart t Piece one and i left it turnt right down i got the skyline cheap but now i can see why ill go take a photo and show you guys what i have done

[Badgaz]

from memory the size of the actuator pipe is too large to run a bleed valve properly you need a restrictor i think.

[Badgaz]

doing this improperly could result in unlimited boost as your wastegate won't open if it doesn't get the pressure it needs to open.....so just be careful...

[blade20034]

[blade20034]

i think the problem is its going into R+R mode

[Ben C34]

When you say boost is on 8 do you mean psi? I had a mate trying to set his boost to 10psi years ago but his gauge was in bar, he just ignored the decimal point.

Remove boost controller, connect directly so its minimum boost, report back.

[KiwiRS4T]

on my 1995 r33 i got i changed the plugs put a boost controller on and a plumb back bov all turbo smart items when the car comes on boost its dies and carry s on like shit and surging jerking not sure what i can do boost level is on 8 has fmic and 3" exhaust i have reset the ecu but still nothing it idles fine takes of good but when i hit the rpm range it goes to shit any ideas?

Do you have a boost gauge? Are you sure you have the boost turned right down or have you turned it right up? Post up your location and see if you can get someone to have a look at your set-up.

[ido09s]

I am putting my money on it being boost cut. I am with Superben, I bet this bloke is looking at the boost gauge thinking its in psi

Do yourself a favour and find a local Skyline specialist and get them to set the boost up on the dyno.

Badgaz, are you really saying that modifying a car to fix a problem is a good thing? You should never do that. You should always start with a perfect running car and modify from there. Installing mods to cover up an issue is only going to end in tears

[nicksamaniac]

You'll probably find if it was set at factory boost level without the increase solenoid, you should only get 5psi max *confirmation needed,

And up to 8psi @ 4500rpm and above, with the solenoid Connected.

If you have your boost T in backwards, it won't work at all regardless of where you set the screw,

It will boost way up to about 15-18psi then you'll get fuel cut, r&r, max out the afm etc.

it will drive fine until you load it up then it will really let you know something isn't right!

Edited March 2, 2014 by nicksamaniac