I think I'm hitting fuel cut @ 11psi

TheMoneyPit

New Member
May 2, 2005
22
0
0
Newburgh, NY
I have an 89t with a newly rebuilt motor. 3" exhaust, 2.5" hardpipes, spearco replica. I just installed an autometer boost gauge. In 3rd gear at 5,000rpm the engine abruptly stops pulling. The gauge says im hitting 11psi when it happens. what could cause this? i dont have a boost controller either.
 

johnathan1

Supra =
Aug 19, 2005
5,056
1
36
35
Downey, California, United States
You're hitting 11psi with just intake and exhaust?? Maybe your wastegate actuator isn't functioning properly? I would check the vac line to the wastegate actuator. Also, fuel cut is normally around 11psi, so that sounds about right.
 

jdub

Official SM Expert: Motor Oil, Lubricants & Fil
SM Expert
Feb 10, 2006
10,730
1
38
Valley of the Sun
You can't miss fuel cut...it's rather dramatic and the check engine light will illuminate ;)
With a stock AFM you'll it it at 12 psi +/-

Check for boost leaks in your IC piping.
 

Clied

Wangan Supra
Jun 8, 2006
367
0
16
36
NorCal
Yea I'm so in the moment when boost builds up that when fuel cut kicks in I forget to lift my foot off the gas pedal.