KA-T Running Lean Poor Throttle Response Videos - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

R3b · 07-26-2015, 01:17 PM

After fixing so many things from the previous owner who was a retard and finally dialing everything down my car ran perfect for about two weeks. I would be cruising and my afr would be around 14.7, everything was good. I would have a lean idle past 18 afr and wouldnt read on my wideband but now two weeks later after not driving it Its running crazy lean and has a worse throttle response. Even when I start it car feels like its going to die but after a second crank it starts really low. Normally on a cold start I would be around 1500 rpms and couple minutes later i would be around 900. Now on a cold start its around 1100 and drops to 700 when warm.

Im thinking its something fuel related, I never liked the fpr I got on the car, some china made shit one. This is what its idling like right now. Sounds so rough and is so sluggish with the worse response imaginable. It doesnt sound like its missing but just not getting any fuel.

https://www.youtube.com/watch?v=em7K...ature=youtu.be (video not embedding)

Here is another video 3 weeks ago before I adjusted my tps and iacv to stop my bogging issue I had for awhile. I also had an issue with a blown knock sensor wire from the connector to the ecu, spent a weekend replacing that and my ecu code went away. Also strangely my fuel pressure would randomly spike to 60 psi for no reason... This is for sure a fuel issue before my injector or something with my first injector. I had a leaking o ring about 2 months ago and engine was flooded. Nothing looked damaged but after burning that oil off it rain so much better. Also my injector plugs dont click onto the injectors, there from a wrx and the guy sanded down the clips so they would fit.

https://www.youtube.com/watch?v=b8YKJy6W1zU

There is no way it could be boost leak related since i have a blow through setup and all the metered air is measured right before the throttle body. So if there air leaking from a boost leak then it wont be as big as of a deal if I had it on my turbo. I could have a vacuum leak but all my egr is deleted and im sure all my lines are gone or covered up. It could be my first injector is finally bad or something else like my fuel pump. Im lost guys. I'll try swap my old spark plugs instead of these e3 spark plugs my dad recommended.

07-26-2015, 01:17 PM	#1
R3b Zilvia Junkie Join Date: Mar 2015 Location: South FL Age: 28 Posts: 581 Trader Rating: (0) Feedback Score: 0 reviews	KA-T Running Lean Poor Throttle Response Videos After fixing so many things from the previous owner who was a retard and finally dialing everything down my car ran perfect for about two weeks. I would be cruising and my afr would be around 14.7, everything was good. I would have a lean idle past 18 afr and wouldnt read on my wideband but now two weeks later after not driving it Its running crazy lean and has a worse throttle response. Even when I start it car feels like its going to die but after a second crank it starts really low. Normally on a cold start I would be around 1500 rpms and couple minutes later i would be around 900. Now on a cold start its around 1100 and drops to 700 when warm. Im thinking its something fuel related, I never liked the fpr I got on the car, some china made shit one. This is what its idling like right now. Sounds so rough and is so sluggish with the worse response imaginable. It doesnt sound like its missing but just not getting any fuel. https://www.youtube.com/watch?v=em7K...ature=youtu.be (video not embedding) Here is another video 3 weeks ago before I adjusted my tps and iacv to stop my bogging issue I had for awhile. I also had an issue with a blown knock sensor wire from the connector to the ecu, spent a weekend replacing that and my ecu code went away. Also strangely my fuel pressure would randomly spike to 60 psi for no reason... This is for sure a fuel issue before my injector or something with my first injector. I had a leaking o ring about 2 months ago and engine was flooded. Nothing looked damaged but after burning that oil off it rain so much better. Also my injector plugs dont click onto the injectors, there from a wrx and the guy sanded down the clips so they would fit. https://www.youtube.com/watch?v=b8YKJy6W1zU There is no way it could be boost leak related since i have a blow through setup and all the metered air is measured right before the throttle body. So if there air leaking from a boost leak then it wont be as big as of a deal if I had it on my turbo. I could have a vacuum leak but all my egr is deleted and im sure all my lines are gone or covered up. It could be my first injector is finally bad or something else like my fuel pump. Im lost guys. I'll try swap my old spark plugs instead of these e3 spark plugs my dad recommended.