If the light was flashing, then you had a misfire. Now, I would normally ask when the last tune up was done, but I don't think the plugs are causing the issue you described. Regardless, I would like to know what code was set in the computer when the light was flashing. It will better help me determine where I feel the problem may be coming from.
Since the problem seems to occur when the engine is under a load (passing, climbing a hill...), the first thing I question is the fuel pump. Have you checked fuel pump pressure?
https://www.2carpros.com/articles/fuel-pump-pressure-and-regulator-test-video-all-cars
The above link is a video showing how to do it. I feel we need to start there to see if the pump is producing pressure that is within the manufacturer's specs. If you don't have a fuel pressure gauge, contact the local parts stores and see if they will lend or rent one to you. NOTE: This video shows how to check pressure, the pressure regulator, and fuel pressure drop off. Check all and let me know what you find.
SPONSORED LINKS
Monday, January 6th, 2014 AT 9:45 AM
