"Timing off" whats going on?

[jgtc_s14]

Ok I unplugged tps.start enginecheck my timing adjust to +20*plug tps back on.timing marks have changed???

whats going on am i doing this right.

i also changed spark plugs and it seems im running richi aslo have an check engine light.Im also gettin hard starts, takes a couple of cranks for engine to turn on.then struggles to stay alive, then runs normal???

any experts help me out

[onosqv]

of course timing marks have changed, you plugged the tps back in, which gives the ecu control of timing...

as long as you do it this way, you are fine:

http://www.ka-t.org/basetiming.htm

[jgtc_s14]

how about if your idle isnt at 750rpm.my hands cannot reach the idle air screw you need like strech arm strong hands.

[onosqv]

If you can't get it to the settings in that link, then your base timing will be off. By how much? who knows, maybe a couple degrees?

Best thing is to get it as close as possible before setting timing. Otherwise you're just guessing.