need a little rb25 help! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

ArBy25DeT · 10-04-2010, 03:41 PM

here is my problem: when i start my car for the first time during the day it runs fine, no problems at all. air/fuel ratio is good runs and drives fine....probably after a good 30mins of driving the car, it wants to run lean at idle, like 16-17 a/f....and when im coming to a stop, sometimes it will cut off and i gotta crank it back on....now i talked to a friend and he says it sounds like the fuel pump...i have a walbro 255, maybe its gone bad? if anyone could chime in on this and help me out, would be much appreciated...oh and the car was tuned from a respectable tuner about 2 months ago and made 344whp and 300wtq....

ArBy25DeT · 10-05-2010, 02:22 PM

i have someone willing to give me a free walbro 255..though i dont want to take it and change out the old one if i dont know for sure... no one else has had this issue?

mrflip69 · 10-05-2010, 03:00 PM

Coolant temp sensor would be my guess... seems like you're having problems after it warms up.

Walbros aren't exactly great, but are you able to hear it whine from startup to when you have your problems? You might need to have it rewired to flow more.

Axe your tuner

10-04-2010, 03:41 PM	#1
ArBy25DeT BANNED Join Date: Aug 2010 Location: south florida Age: 34 Posts: 81 Trader Rating: (0) Feedback Score: 0 reviews	need a little rb25 help! here is my problem: when i start my car for the first time during the day it runs fine, no problems at all. air/fuel ratio is good runs and drives fine....probably after a good 30mins of driving the car, it wants to run lean at idle, like 16-17 a/f....and when im coming to a stop, sometimes it will cut off and i gotta crank it back on....now i talked to a friend and he says it sounds like the fuel pump...i have a walbro 255, maybe its gone bad? if anyone could chime in on this and help me out, would be much appreciated...oh and the car was tuned from a respectable tuner about 2 months ago and made 344whp and 300wtq....

10-05-2010, 02:22 PM	#2
ArBy25DeT BANNED Join Date: Aug 2010 Location: south florida Age: 34 Posts: 81 Trader Rating: (0) Feedback Score: 0 reviews	i have someone willing to give me a free walbro 255..though i dont want to take it and change out the old one if i dont know for sure... no one else has had this issue?