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The Terminator
Engine/Tuning
Cure to 2500 rpm lean spike
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<blockquote data-quote="TP03" data-source="post: 16493925" data-attributes="member: 178166"><p>I've gained so much knowledge from this forum and never really had much to give, that hasn't already been mentioned. I came across something this summer that really helped the problems I was having so I thought I'd share and maybe save someone else a headache.</p><p></p><p>This spring I dumped quite a bit of money into my car. Mainly blower swap and full Fore return fuel system. I ended up going with a dead head setup since so many have good luck with it here and I really like how clean it looks just having two lines running into the back of each rail.</p><p></p><p>After getting everything installed I started the process of remote tuning. Revision after revision it became apparent that at 2500 rpm I was getting a lean spike that wasn't going away. I could see it on my wideband but more so I could feel and hear it popping at that spot consistently. My tuner was very good at trying a bunch of different things, messing with transient fuel and trying to tune it out but no matter what was added it was still there.</p><p></p><p>Finally at my wits end I took to google and figured someone else has to have some info on a similar problem. After spending a decent amount of time searching I came across some old info on a Nissan forum that talked about having a factory fuel pulse damper that smooths out harmonics in the fuel system and how one guy had low rpm lean spikes after removing it.</p><p></p><p>This gave me a direction and something to at least try. After a quick search I came across the company "Radium" that sells aftermarket fuel pulse dampers for high pressure/flow fuel systems.</p><p> <a href="http://www.radiumauto.com/Fuel-Pulse-Damper-Direct-Mount-Kits-P759.aspx" target="_blank">Fuel Pulse Damper, Direct Mount Kits</a></p><p></p><p>I figured what the hell it's worth a shot for $100. So I ordered a damper that I could adapt to thread into my fuel rail. After I received/installed it, On the first test drive I was completely blown away. I spent a good part of my summer with numerous tune revisions and with a 15 min install and $100 that lean spot was gone. Car ran amazing and absolutely zero lean spike. I did have to get another tune revision to take some of the fuel out of that spot that was added when trying to mask it.</p><p></p><p>In no way am I working for or even know anyone from Radium but their product flat out worked for me and cured a lot of headaches and I thought I'd share.</p></blockquote><p></p>
[QUOTE="TP03, post: 16493925, member: 178166"] I've gained so much knowledge from this forum and never really had much to give, that hasn't already been mentioned. I came across something this summer that really helped the problems I was having so I thought I'd share and maybe save someone else a headache. This spring I dumped quite a bit of money into my car. Mainly blower swap and full Fore return fuel system. I ended up going with a dead head setup since so many have good luck with it here and I really like how clean it looks just having two lines running into the back of each rail. After getting everything installed I started the process of remote tuning. Revision after revision it became apparent that at 2500 rpm I was getting a lean spike that wasn't going away. I could see it on my wideband but more so I could feel and hear it popping at that spot consistently. My tuner was very good at trying a bunch of different things, messing with transient fuel and trying to tune it out but no matter what was added it was still there. Finally at my wits end I took to google and figured someone else has to have some info on a similar problem. After spending a decent amount of time searching I came across some old info on a Nissan forum that talked about having a factory fuel pulse damper that smooths out harmonics in the fuel system and how one guy had low rpm lean spikes after removing it. This gave me a direction and something to at least try. After a quick search I came across the company "Radium" that sells aftermarket fuel pulse dampers for high pressure/flow fuel systems. [URL="http://www.radiumauto.com/Fuel-Pulse-Damper-Direct-Mount-Kits-P759.aspx"]Fuel Pulse Damper, Direct Mount Kits[/URL] I figured what the hell it's worth a shot for $100. So I ordered a damper that I could adapt to thread into my fuel rail. After I received/installed it, On the first test drive I was completely blown away. I spent a good part of my summer with numerous tune revisions and with a 15 min install and $100 that lean spot was gone. Car ran amazing and absolutely zero lean spike. I did have to get another tune revision to take some of the fuel out of that spot that was added when trying to mask it. In no way am I working for or even know anyone from Radium but their product flat out worked for me and cured a lot of headaches and I thought I'd share. [/QUOTE]
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Cure to 2500 rpm lean spike
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