Weird ignition cut?
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Joined: Jan 2016
Posts: 95
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From: Fort Myers Florida
Weird ignition cut?
Hey everybody, I have an LS3 Grand Sport with an A&A vortech kit on it. I am having an intermittent loss of power after the car is hot (been on highway 50+ miles or heavy stop and go traffic) Normally the cut happens around 5800 rpm but it seems the hotter the engine is it will start cutting out earlier around the 5000-5200 RPM range. It feels like the car is losing fuel or the holes aren't firing... I initially thought that it was a fuel issue but last night I was finally able to data log the car with HPtuners when it was acting up. I found that my fuel pressure stays consistent and does not drop. The injector duty cycle stays the same (90%).I do have a boost a pump but if that was failing wouldn't my IDC be skyrocketing if so, and have a loss of fuel pressure? My battery voltage does drop down to 12.6v range when I stab it but comes back up to mid 13s and stays there during the cut. My O2 sensors go straight lean on both banks when the car cuts out but my fuel pressure is still consistent and injectors are still dumping fuel. does this mean I am having a spark issue? Any help would be greatly appreciated. Thanks in advance
Last edited by ThatWhiteVette; Dec 2, 2016 at 08:45 AM.
