Cant go past 5k rpm

[89gt02]

Hey guys i have searched for answers on this and cant really find a specific answer and solution.
so im having this wierd stuff goin on with my 1g laser i just bought. The car runs great and has good power but ever since i got it the car wont pull past 5k rpm.
It feels like a rev limit so idk wats goin on if its rich or lean or knock idk.
So i had a fuel cut issue but fixed it by removing lower honeycomb and turning that big plastic srew in the bottom out a good ways. So now im not getting fuel cut but im having this issue.
So i put in a boost gauge to check and its boosting almost to 19 psi on the gauge and keep in mind im using stock bcs. So i have no boost leaks i tested! And then i figure maybe run off wastegate pressure so i did line from jpipe to wg and it still boosting like over 15psi.
No fuel cut tho. Please help guys its my dd and i dont wanna blow it up. Could it be exhaust related because my only mods to this car is 3in full exhaust no cat and a k&n filter with no air can. The egr still on the car but unhooked with the two lines capped off do i need a block off plate or is it ok anyway idk if that has anything to do with my issue or not.

Also i just put brand new bpr6ey plugs in gapped at. 28-.30 and new looking wires they dont look bad. So idk. ### to do guys i dont have money at this moment to just throw parts at it and i hope to soon get dsmlink and a wideband and new laptop.

 

[Phantom DSM]

bpr6ey? you mean bpr6es right ? Get correct plugs ,bpr6es coppers gapped at.028 like you have. You have checked boost leaks, do you happen to have any exhaust leaks around downpipe,o2 housing, or manifold etc. Also are you on stock fuel pump as well ? Any check engine codes you can get would help

 

[89gt02]

No they are bpr6ey they didnt have any 6esdsm at the store so i got those. And yes only mods to car is the 3 inch exhaust everything is stock and air can removed. Stock pump and stock 450cc injectors. And stock bcs so it should be running stock boost pressure but it spikes to almost 19psi
and cuts out at 5000 rpm sounds like a damn rev limit or something but it is no means fuel cut because i had that and finaly stoped the fuel cut so its not hitting the brick wall but its still not right and i dont know what to do.

They were out of the bpr6es and 7es too

I dont think there is any exhaust leaks or wouldn't i hear it? Also will a exhaust leak cause the horrible problem im having?

No cel either

 

[Phantom DSM]

Try pep boys or oreillys and just give them the part number bpr6es, they should have em. I hate when they try to sell you b.s. Bosch plugs when they search by year and model.
On stock fuel system and 19 psi i can see the T-25 falling off (or do you have a 14b ?) Is the vacuum routing the same as below on the turbo, there is a Tee as well. Also have you checked the wastegate actuator arm

 

[89gt02]

I have a 1g laser and yeh all vacuum line routing is factory. The whole car is stock except that exhaust.
But why is it hitting 19 psi? Im using stock bcs and im trying to just run stock im not modding the car yet so i just want it to run good.
Even if the turbo is falling on its face it still should go past 5k5k rpm hell thats not even near redline and the car is stock

What is it doing when this happens? Is it leaning out because i was worried of that and like i said i tried torun just wastegate pressure which should be 7psi and it still hitting upwards of 15???? What the hell is goin on?

My egr is there but nothing ran to it so will that be a problem or do i need to put a block off plate in place of it since im not using it?

Really need help on this car guys any input is appreciated

 

[Phantom DSM]

I have a 1g laser and yeh all vacuum line routing is factory. The whole car is stock except that exhaust.
But why is it hitting 19 psi? Im using stock bcs and im trying to just run stock im not modding the car yet so i just want it to run good.
Even if the turbo is falling on its face it still should go past 5k5k rpm hell thats not even near redline and the car is stock

What is it doing when this happens? Is it leaning out because i was worried of that and like i said i tried torun just wastegate pressure which should be 7psi and it still hitting upwards of 15???? What the hell is goin on?

My egr is there but nothing ran to it so will that be a problem or do i need to put a block off plate in place of it since im not using it?

Really need help on this car guys any input is appreciated

I thought you had a 2g, please update your profile/avatar..had some confusion there.
When you did the boost leak test, did you notice the internal wastegate actuator, the diaphragm could be leaking, wont even open ?This could be related to your overboosting, they can fail on 14b turbos. The o2 housing and turbine housing usually crack as well. Heres a long thread about this issue as well.
http://www.dsmtuners.com/forums/new...-boost-creep-creeping-t25-14b-16g-merged.html

 

[89gt02]

At the top on this thread i put need help with a 1g### laser i just bought but i am gonna update it and also yes my first thought was bov but its working great and blows off good. Also i have rhe stock turbo that came on the laser. But i just cant fire out why it wont go past 5k rpm it just dont make sense.
Is it like leaning out or something because its not overrunning the maf or it would fuel cut again. But i did do a little work to the maf to finaly rid my fuel cut but even though that is fixed it has always done this 5k rpm cut and it sucks because as soon as it starts to build good power it just craps out at 5

 

[Phantom DSM]

At the top on this thread i put need help with a 1g### laser i just bought but i am gonna update it and also yes my first thought was bov but its working great and blows off good. Also i have rhe stock turbo that came on the laser. But i just cant fire out why it wont go past 5k rpm it just dont make sense.
Is it like leaning out or something because its not overrunning the maf or it would fuel cut again. But i did do a little work to the maf to finaly rid my fuel cut but even though that is fixed it has always done this 5k rpm cut and it sucks because as soon as it starts to build good power it just craps out at 5

I missed the 1g part, my bad.. I understand it is frustrating, been there man.. By wastegate actuator im not talking about the Bov, im referring to this

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You need to check if it is working properly. If you are creeping that high on boost then you will have issues as you are experiencing. By hacking the maf, you are able to get past the usual cutoff, not to mention stock fuel pump cant flow enough to handle higher boost like that. Try doing another boost leak test and check the actuator above.

 

[89gt02]

Yeh i know thats the wastegate actuator on the turbo because its internally wastegated. Im not new to dsms ive had 3. A 1gstock talon turbo and a 2g gst and now a 1g laser rs . And yeh i was saying im running everything stock on the motor snd stock bcs, the solenoid that controls the wastegate and boost. Thats why i was stumped why its overboosting on a entirely stock sytem.
and yeh man i was thinking maybe the wastegate and arm was messed up like you said but it all looks good and how will i test it?
Like i said do you think my huge exhaust is causing a issue?
And what should i do with my egr valve i asked about as far as blocking it or what?
So how do i test this wastegate and arm?
By the way thanks for all the help man i have no dsm friends to help around where i live.

 

[Phantom DSM]

No prob man, people do usually get boost creep issues with downpipe and catless exhaust upgrades since you are reducing the backpressure.
You can test the wastegate actuator by taking off the cotter pin holding the arm to the flapper and see if the rod moves freely.
i would block off the egr with a block off plate, less than 10 bucks on ebay sealed ith gasket or rtv, no boost leaks.

 

[89gt02]

Ok so i finaly got the car to hold a consistent 10psi and yet the car still is cutting out at 5000 rpm i cant figure that part out i know dang well this car should turn past 5000 when i floor it.

 

[screamingdemon]

What does your plugs look like? I had the same problem. My car would jerk like a rev limiter and not go. Boost leaks everywhere and fouled out plugs.

 

[Phantom DSM]

Ok so i finaly got the car to hold a consistent 10psi and yet the car still is cutting out at 5000 rpm i cant figure that part out i know dang well this car should turn past 5000 when i floor it.

Glad you got the boost figured out man, try to get those spark plugs we taked about and go from there.make sure your plug wires are good as well to avoid misfires.

 

[89gt02]

Ok guys those bpr6ey i just put in two days ago. Do you think i should go buy the 6es instead of the 6ey plugs