Car misses, rough idle, seems smooth after 50mph but no power. Noisy lifters or rockers, Oil pressure erratic (10-30-20 back to 30 etc, idles between 20-30psi) Any ideas? High mileage car (335 K) that has been well maintained. I only paid $2000 for it but I hate to spend another $1000-2000 on valve train work just to have bottom end failure. Timing chain and 2 valves was replaced about 5 years ago.(100K) (Double row etc) How about the bottom end on the 3.8? Is it fairly dependable? Is it worth fixing at all?
Any help would be greatly appreciated.