I seem to be having a vacuum issue where it wont open fuel vaporizer all the time, periodic. 8FGCU30 4Y, tune-up done, compression good, new sensor in dist, new vaporizer and cleaned fuel filter. When its in its bad mode it wont start unless i spray small amount of starting fluid in air cleaner housing. Spark testers show spark isnt an issue.
any help appreciated
Check throttle body for dirt/gum build up and give it a good clean. Build up holds throttle open and causes issues.
oh dont mess with timing. You most likely need a throttle position sensor. The dead spots confuse computor, and make it think you are going up and down on the accel pedal. I'm assuming you're plugs and cap,rotor were checked?