Our Toyota lift starts fine, but engine speed control is very erratic. Engine surges and hunts, throttle response is sluggish. When throttle is applied, engine speed "hunts". Hard to have fine control because of this. Does not matter whether engine is cold or warm. I understand Toyotas use an electronic regulation/engine controller that is not adjustable. Heard somewhere to adjust distributor timing under load to get best performance. Is the dist. mech or vac advance? What is the correct setting w/timing light, procedure?
Thanks for any help!
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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?
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