RB25 starts fine then sputters and dies HELP! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

RB25GUY · 04-09-2016, 06:17 AM

well the q45 throttle body and no recirc bov will make the car run like shit if its not tuned! but tps could be the culprit but lets see after the injs and coils

usmcgetsome · 04-09-2016, 10:45 AM

Q45 MAF usually intended for aftermarket ecu and tune. Check wiring connection to that maf. Check the wiring to your fuel pump tank assembly (mine was brittle and kept shearing). When a maf begins to fail youll notice at normal operating temps the engine will just die randomly. It'll cool down for a bit and then start right back up and drive till it gets hot again and repeat.

wiring specialties · 04-09-2016, 01:10 PM

Quote:

Originally Posted by usmcgetsome

Q45 MAF usually intended for aftermarket ecu and tune. Check wiring connection to that maf. Check the wiring to your fuel pump tank assembly (mine was brittle and kept shearing). When a maf begins to fail youll notice at normal operating temps the engine will just die randomly. It'll cool down for a bit and then start right back up and drive till it gets hot again and repeat.

If the engine is struggling to start when warm, a common failure is the temp sensor. Easy thing to try. Its the 2-pin one.
If you need a new connector, just hit us up.

240Lover770 · 04-09-2016, 02:10 PM

Quote:

Originally Posted by wiring specialties

If the engine is struggling to start when warm, a common failure is the temp sensor. Easy thing to try. Its the 2-pin one.
If you need a new connector, just hit us up.

the engine barely runs long enough to get warm

240Lover770 · 04-09-2016, 04:32 PM

may just throw in the towel and bring it to a shop

240Lover770 · 04-09-2016, 02:13 PM

Quote:

Originally Posted by RB25GUY

well the q45 throttle body and no recirc bov will make the car run like shit if its not tuned! but tps could be the culprit but lets see after the injs and coils

injectors will be here next week. i still need to find a set of coil packs to buy. the throttle body and no bov didnt seem to have an affect on anything when i first got it. ran really good. then one day it just shit. only thing i noticed was slight hesitation on acceleration. thats about it. i never fifured out why because now the car wont run normally

04-09-2016, 10:45 AM	#2
usmcgetsome Leaky Injector Join Date: Jun 2008 Location: San antonio Age: 45 Posts: 60 Trader Rating: (1) Feedback Score: 1 reviews	Q45 MAF usually intended for aftermarket ecu and tune. Check wiring connection to that maf. Check the wiring to your fuel pump tank assembly (mine was brittle and kept shearing). When a maf begins to fail youll notice at normal operating temps the engine will just die randomly. It'll cool down for a bit and then start right back up and drive till it gets hot again and repeat.

04-09-2016, 04:32 PM	#5
240Lover770 Zilvia Member Join Date: Mar 2011 Location: hawaii/atlanta Age: 36 Posts: 230 Trader Rating: (4) Feedback Score: 4 reviews	may just throw in the towel and bring it to a shop