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Message: <blockquote data-quote="Blueraz_5.0" data-source="post: 1495705" data-attributes="member: 26251">Ok, so this is a situation. 98 mustang gt, stick.Background: I started daily driving this car two weeks ago, and since then, I've put nearly 3.5k miles on it. No issues at all until today. It had sat for 6 years with the previous owner. All original, all stock except what I mention here.: Within the past few months, while it was mostly sitting (taken around the block now and then),  I've done: Fuel pump, intake manifold, and spark plugs all at 97k miles. 2 days before I started dailying it, I put in a new alternator. Its been perfect since. Until today. its at 100,500 miles as of the issues of today.What happened: I had just taken it on a bit of a cruise, (highway cruising at about 70-80mph for about 80miles). Went through a drive through and parked to eat for a bit, turned off the car, had interior lights on for maybe 5mins or so, then turned them off. maybe 10 minutes later, turned the car into on mode (didn't start it yet) and rolled up the windows. Maybe 2 minutes later, went to start the car, and it just ground for a sec and didn't start. tried it one more time, and nothing. turned it all the way off, then back on and tried to start it and it was dead. no lights, nothing. asked a nearby Camaro for a jump, tried to jump it and the Camaro died. wouldn't start again. happened to try and start my car again, and it started up fine. No issues. We never did successfully jump my car, the cables weren't on for more than 30 secs before the Camaro died. It just fixed itself after being completely dead with no power whatsoever. Symptoms: It sounded a little burbly while we were trying to fix the Camaro, but I figured it was the cold (still new to driving this thing, not sure of all the noises it makes yet), new almost buzzing rattle in the engine, almost sounds like a hissing/ticking combo?, went to drive it home, (never turned it off), and I'm severely lacking power. First had the acceleration of maybe fourth. sounded ok? I think? I can't tell if its missing, or just burbly from the cold. engine was warm by now after idling while we worked on the Camaro. But later, still on the way home, the acceleration picked up to almost normal, unless im on the gas hard. If im gentle with it, its fine, but if I try to pull, its weird still. If I ease onto the gas to maybe half throttle, it still doesn't pull as hard as it should. but it I slam onto the gas to half throttle, it pulls like it should. got home, tired turning it on and off again, all good. It has a slight idle drop though, it tends to idle at 750ish, but it would drop to 700-650ish for a sec then bounce up. never did that before. Tried starting it a few more times in my driveway, its fine now. Any ideas? I'm completely stumped. (also as to why the Camaro killed itself? I don't know the guy and I killed his car, I feel terrible) I can't think of anything that could be going on with it.Please help, this is my daily driver and I need it.</blockquote>