Ok, checklist time....
Code 51 - present or fixed?
Mechanical timing set properly - yes or no?
Injectors - yellow top or green top?
ECU - yellow plugs or grey?
ECU wiring harness plugs - yellow or grey?
Injector resistor pack - present or not?
Distributor - pre89 or 89+ (the pre89 model has a pigtail, the 89+ revision has the harness connector molded into the body)?
TPS properly calibrated - yes or no?
Any other error codes present?
These parts are not interchangeable... Toyota did a decent job at making the wiring stuff easy to follow... Grey plugs on harness + grey plug ECU + green injectors... Yellow plug harness + yellow plug ECU + yellow injectors + resistor pack (only present on the pre89 harness, if you don't have a spot for it you're running a GREY plug 89+ harness or you're looking in the wrong place). I wish that they did the same thing with the GE that the did with the GTE and changed the shape of the connectors instead of just the colors but really it should be pretty obvious if you've got the wrong color combo.
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