1992 Buick Park Avenue No Throttle Response
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
Suggested Repair
Perform a fuel pressure test while the no-throttle symptom is occurring, with the gauge taped to the windshield so the reading can be checked on the highway. A fuel pressure regulator that fails when hot can flood the engine and should be verified by that test.
Conversation Summary
A 1992 Buick Park Avenue runs normally around town but, after extended highway driving, loses throttle response when the accelerator is pressed. Easing off the pedal restores power, the engine revs normally in park, and a 10-15 minute cooldown temporarily fixes it. A user reported a similar heat-related issue caused by a bad fuel pressure regulator. The expert advised testing fuel pressure while the problem is happening, with the gauge taped to the windshield, to confirm a regulator fault.
