Yet another fuel problem; specifics inside
1997 T-Bird, 4.6/automatic. Plugs look ok, no fouling or obvious signs of anything strange.
Ok, It's been doing this for a while now so I really started to pay attention to the symptoms before asking.
How it started:
No problems at all before this day, none at all. Filled the tank and had to go for a long drive. On the expressway I darted right onto an offramp and felt the car buck. After getting on a straightaway I swerved the car back and forth. Every time I did this the car would buck and skip, then clear up. It would only do this when the fuel was sloshed in the tank (apparently)
How it is now (after 2 months):
When the car is cold, no problems. Swerve the car back and forth; nothing unusual. Floor it, goes as it should. Lug the engine, it goes as it should. Now, when the car reaches normal operating temperature if the engine lugs it bucks and skips. If I leave the car in second gear to keep the RPM's up it will never buck. I can get it well over 3,000 RPM without a problem as long as it's held in a lower gear and the throttle isn't opened enough to cause big vacuum drop.
Haven't checked the fuel pressure yet but that's on the list. What's the correct pressure? With vacuum connected and disconnected?
White 1997 LX Sport 4.6