Disconnect the plug you think disables EST, does the timing light show the timing mark PERFECTLY STEADY on the crank pulley?

Reconnect the plug, the light should make the timing mark jump around to the point it MAY SEEM BLURRY.

If you can't tell the difference EASILY between having the connector connected or not, than you got the wrong one.

I hope this has not already been covered--it seems like you weren't positive about the EST connector.

CHRIS
98 Amigo, 92 Pup

need a pickup 1st gen fuel level sender