4k Bogs hard after running for awhile? Video! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

feooo · 09-04-2011, 03:14 PM

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So after driving for say 20 or 30 minutes, my car doesn't want to rev past 4k while in gear. In addition there's a very noticeable loss in power. In the video, I'm practically flooring third towards the end. You'll see it struggle to reach 4k, and when it does it'll just sit there. I've already done plug and wires and the fuel filter is still pretty new. I'm thinking it's a fuel delivery problem. I can hear a sipping noise coming from around the general area of the fuel rail when the car starts acting up like this. What do you guys think? SOHC btw.

slothonaleash · 09-04-2011, 03:16 PM

have you considered the fuel pump?

feooo · 09-04-2011, 05:23 PM

Yea, that's probably the next thing ill replace. You think it just starts to give out after pumping for awhile? It'll go away after the cars off for a few hours though then start all over

feooo · 09-04-2011, 05:51 PM

Yea, that's probably the next thing ill replace. You think it just starts to give out after pumping for awhile? It'll go away after the cars off for a few hours though then start all over

tommytwo40hands · 09-07-2011, 05:13 PM

sounds like a rev limiter to me...mine just hits 4k (4th and 5th gear) and falls on its face until i push in the clutch...still trying to find out why

frifox · 09-07-2011, 05:50 PM

had a problem similar to this. its like the engine was hitting a limiter if in gear, but if in neutral i could go all the way up to redline...
the issue was with the maf sensor plug which wasnt making good connection so i had to force ziptie the plug so it wouldn't come out anymore.

09-04-2011, 03:14 PM	#1
feooo Leaky Injector Join Date: Dec 2010 Location: Aiea, HI Posts: 55 Trader Rating: (3) Feedback Score: 3 reviews	4k Bogs hard after running for awhile? Video! Video (Sorry it's sideways! ) So after driving for say 20 or 30 minutes, my car doesn't want to rev past 4k while in gear. In addition there's a very noticeable loss in power. In the video, I'm practically flooring third towards the end. You'll see it struggle to reach 4k, and when it does it'll just sit there. I've already done plug and wires and the fuel filter is still pretty new. I'm thinking it's a fuel delivery problem. I can hear a sipping noise coming from around the general area of the fuel rail when the car starts acting up like this. What do you guys think? SOHC btw.

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09-04-2011, 03:16 PM	#2
slothonaleash Zilvia Addict Join Date: Jan 2007 Location: Columbus, Ohio Age: 29 Posts: 745 Trader Rating: (4) Feedback Score: 4 reviews	have you considered the fuel pump?

09-04-2011, 05:23 PM	#3
feooo Leaky Injector Join Date: Dec 2010 Location: Aiea, HI Posts: 55 Trader Rating: (3) Feedback Score: 3 reviews	Yea, that's probably the next thing ill replace. You think it just starts to give out after pumping for awhile? It'll go away after the cars off for a few hours though then start all over

09-04-2011, 05:51 PM	#4
feooo Leaky Injector Join Date: Dec 2010 Location: Aiea, HI Posts: 55 Trader Rating: (3) Feedback Score: 3 reviews	Yea, that's probably the next thing ill replace. You think it just starts to give out after pumping for awhile? It'll go away after the cars off for a few hours though then start all over

09-07-2011, 05:13 PM	#5
tommytwo40hands Leaky Injector Join Date: Jun 2010 Location: Springfield, MO Age: 32 Posts: 145 Trader Rating: (2) Feedback Score: 2 reviews	sounds like a rev limiter to me...mine just hits 4k (4th and 5th gear) and falls on its face until i push in the clutch...still trying to find out why

09-07-2011, 05:50 PM	#6
frifox Join Date: Apr 2010 Location: Portland, Oregon Age: 33 Posts: 43 Trader Rating: (0) Feedback Score: 0 reviews	had a problem similar to this. its like the engine was hitting a limiter if in gear, but if in neutral i could go all the way up to redline... the issue was with the maf sensor plug which wasnt making good connection so i had to force ziptie the plug so it wouldn't come out anymore.