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Message: <blockquote data-quote="Chris Stephens" data-source="post: 1467340" data-attributes="member: 24095">I figured the engine issue out! [USER=24286]@Werecow[/USER] you were on the right track. Turns out it was the brand new AEM 50-1005 fuel pump. I installed it on Wednesday before we hit the track along with new filter elements. I also pulled the tank and inspected for rust or anything else that may have been clogging. Then pulled it onto the trailer. It had maybe two hours of run time on it when it started acting up. Never lost pressure at idle, even if I just turned the pump on and let it sit at 60 PSI while watching it. But trying to drive, it would act up and lose pressure apparently.I took it for a drive Saturday and it was still acting up. Topped it off with gas, then got about a half hour away, and it started surging. The pump would get loud, go quiet, back and forth. AFR spiking lean, then normal, then back lean, etc. Pulled over, turned on only the pump, checked pressure at the regulator. 20 PSI at first, then it started jumping around, up to 40, back down to 20, etc. Let it sit for a few, then took off just trying to make it back to the shop. AFR still shooting around. Occasionally I would just have to shut the engine down and coast in neutral, wait a minute, then fire back up, get back up to speed, etc. Pump was hot to the touch. So now I am trying to figure out how to keep a pump alive. The A1000 died and then an AEM a couple engine hours later. So I have an email in to each company to review my system and give me an idea of anything else that could be killing them. In the meantime, I have a new AEM pump on the way to at least make it through AutoX this weekend.I also have some sway bar end links...I checked out the front end while I had the car in the air over the weekend, and the passenger side upper bushing was GONE. Not "in bad shape". Like, no longer present. The driver side was torn on the upper one and the lower bushing was halfway pressed into the hole in the control arm.Also got the new tires mounted up and balanced. They felt pretty nice, but I'm sure half of that feeling was just a placebo. Unfortunately, I also noticed the end link before I drove, so I don't really know how good they feel yet. The AutoCross this weekend will be the real test.On the plus side, for this event, I will have new Falken tires, new swaybar endlinks, freshly adjusted rocker lash, a fresh tune, a fresh fuel pump, and the full knowledge that something is still gonna break on me. Fun times.</blockquote>