Need insight cant get into boost-.-

[Alex_23]

I?m having trouble hitting boost on my black top Sr. I?m also running really rich and cuts off around 3500 4K rpms (tryna hit boost)
Here?s a list of what I have on the motor.

Wiring specialties harness
*Rs Enthalpy Rom Tune
P2mcoilpacks
720cc injectors
CircuitSports fuel rail
Isr fuel pressure regulator
Cusco catch Can
AEM guages oil psi/ A-F Ratio/ turbo
Tomei exhaust mani
Tomei Turbo outlet
Z32 maf
T28 S14 turbo
255 walboro fuel pump

A little history about the motor:
I bought the swap off of my buddies buddy about 2 years ago, everything was working fine when he had it running ,no issues at all, so. I had the swap sitting for about a year then I put it into my chassis and I?m having trouble hitting boost like I said.. the motor starts up everything is good , I just can?t hit boost cuts off like I said .. I swapped out the maf to another z32 one and still the same thing , I?ll try and clean them both tmrw.. any pointers ? Ty

[NukeKS14]

Have you done a boost leak test?

[S14rebuild]

Sounds like a boost leak

[tuzzio]

Make sure someone didn't stuff a rag into the intercooler piping at all. Seen that happen too many times

[Alex_23]

Did a boost leak test today ..
Right of the bat a vacuum line wasn’t plugged lol..
I plugged it up and
I’m finally hitting boost but it’s still hesitating a bit at 4K, once I let off the throttle a bit then I step on it I’m able to hit boost. So maybe I’m still leaking somewhere

Ran out of time today, so tomorrow I’ll test it again & thoroughly check all the pipe couplings etc..
Thanks guys’.
Hopefully I’m able to clear that 4K cuttoff hiccup tmrw

[S14rebuild]

Check your spark plugs for shits and giggles as well

[Alex_23]

Did the boost leak test again Today
Everything is tight Nd no leaks!
BUT..
I can’t get into solid straight up boost lol
It’s cuts off at around 4Kish rpm, I let go of the throttle a bit then I step on it and boom boost!
ANY other things I should look out for??
Im going to spray the maf w cleaner see if it makes a difference..

[NukeKS14]

Did the boost leak test again Today
Everything is tight Nd no leaks!
BUT..
I can?t get into solid straight up boost lol
It?s cuts off at around 4Kish rpm, I let go of the throttle a bit then I step on it and boom boost!
ANY other things I should look out for??
Im going to spray the maf w cleaner see if it makes a difference..

What did your plugs look like when you pulled them?

Have you checked your ecu for codes?

Have you checked base ignition timing?

Checked/verified tps voltage (not replaced it, actually checked that it is adjusted correctly)

Pull your dipstick. Is the oil thin or does it smell like fuel? If so I would replace it.

Id start there.

[Alex_23]

What did your plugs look like when you pulled them?

Have you checked your ecu for codes?

Have you checked base ignition timing?

Checked/verified tps voltage (not replaced it, actually checked that it is adjusted correctly)

Pull your dipstick. Is the oil thin or does it smell like fuel? If so I would replace it.

Id start there.


So I checked the sparkplugs & yeah they need replacing (going w BKR7E)
Found oil in cyl 1 , so I?m going to replace the tube seal gasket & valve cover.

Checked the oil does seem thinned out a bit , since I was running rich asf I?m just going to change that out too cuhs why not..

Checked the TPS voltage it?s good 4 volts open throttle

[NukeKS14]

Did you try pulling codes on the ecu?