SR Boost problem spuddering - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

s13dan · 11-05-2004, 03:54 PM

I have a Redtop with stock T25,370cc injectors.intake FMIC, i had the boost stock for a long time then i turn the boost up with a Manual turbo XS boost controller i couldnt run more than 10psi as normal , then i got a new fuel pump... problem is i dunno what fuel pump i have.... i was told it was for a 300zx TT then he said it was actully for a 3rd gen RX-7.. then pump is a lot better than my stock one..i dont have the power elay thing.. im not really sure what that is. its brand new i got it from a autoparts store... FREE. its a carter P72165.. sometime i can run 14 psi with no problem but it does spike really bad.. but after the engine warms up it wont run more than about 11psi with spuddering BAD... real odd thing is that even when i was running 12-13psi when its wasnt spuddering the car wasnt any fast at all... HELP!?!

sr240mike · 11-05-2004, 09:56 PM

1) manual boost controllers spike
2) The fuel pump does not affect the boost
3)You probably have a boost leak which causes sputtering, loss of power, loss of boost.
4) I would only stick with a nissan fuel pump, the autoparts store should give you the correct one and not lie and say its for a 300zxtt.

Dutchmalmiss · 11-06-2004, 02:06 PM

you try checking gaskets, sparkplugs, or even the fuel filter?

s13dan · 11-07-2004, 03:06 PM

The auto parts store didrt lie, my friend that works there was mistaken either way it was free,and i know the fuel pump dosnt change the boost my turbo xs boost controller did that... the pump would have made it possible.. and tonight im ganna check those things...

11-05-2004, 03:54 PM	#1
s13dan Zilvia FREAK! Join Date: Aug 2003 Location: Springfield, Mo Posts: 1,519 Trader Rating: (2) Feedback Score: 2 reviews	SR Boost problem spuddering I have a Redtop with stock T25,370cc injectors.intake FMIC, i had the boost stock for a long time then i turn the boost up with a Manual turbo XS boost controller i couldnt run more than 10psi as normal , then i got a new fuel pump... problem is i dunno what fuel pump i have.... i was told it was for a 300zx TT then he said it was actully for a 3rd gen RX-7.. then pump is a lot better than my stock one..i dont have the power elay thing.. im not really sure what that is. its brand new i got it from a autoparts store... FREE. its a carter P72165.. sometime i can run 14 psi with no problem but it does spike really bad.. but after the engine warms up it wont run more than about 11psi with spuddering BAD... real odd thing is that even when i was running 12-13psi when its wasnt spuddering the car wasnt any fast at all... HELP!?! __________________ 89 240sx hatch #933-the hot rod 91 240sx coupe #131,603-the daily

11-05-2004, 09:56 PM	#2
sr240mike Zilvia FREAK! Join Date: Apr 2004 Location: California, Norcal biiaatch Posts: 1,185 Trader Rating: (0) Feedback Score: 0 reviews	1) manual boost controllers spike 2) The fuel pump does not affect the boost 3)You probably have a boost leak which causes sputtering, loss of power, loss of boost. 4) I would only stick with a nissan fuel pump, the autoparts store should give you the correct one and not lie and say its for a 300zxtt. __________________ TWO IN THE COOT, ONE IN THE POOT

11-06-2004, 02:06 PM	#3
Dutchmalmiss Post Whore! Join Date: Apr 2003 Location: Socal (323) Age: 39 Posts: 3,501 Trader Rating: (14) Feedback Score: 14 reviews	you try checking gaskets, sparkplugs, or even the fuel filter? __________________ Pignose, biaaatch.

11-07-2004, 03:06 PM	#4
s13dan Zilvia FREAK! Join Date: Aug 2003 Location: Springfield, Mo Posts: 1,519 Trader Rating: (2) Feedback Score: 2 reviews	The auto parts store didrt lie, my friend that works there was mistaken either way it was free,and i know the fuel pump dosnt change the boost my turbo xs boost controller did that... the pump would have made it possible.. and tonight im ganna check those things... __________________ 89 240sx hatch #933-the hot rod 91 240sx coupe #131,603-the daily Last edited by s13dan; 11-07-2004 at 08:27 PM..