in that case i think i may have a bad distibutor or coil,the car cranks on point and runs fine,but SOMETIMES,(mostly when i pull of from a stop) or on the highway,it will; start to studder slightly losing power like its runining out of gas.when i take my foot off the gas then puti it back it goes back to nornal then later start it again. i changed the gas tank,pump and filter. so should i try the relay as well????? and thanks for your reply dude,it give me a direction to atleast start in.