i have a 92 pulsar i think it had an sr18, previous owner tried putting in an sr20de.
car wont idle, revs surge when running, above a third throttle it starts to run like its really retarded?

i advanced the timing as far as i could on the dizzy and it made it slightly better.

any ideas? i wonder if the timing is out a tooth on the chain? or if i have the wrong computer or maf sensor or something?

help please!!