i have a 98 dx accord. i threw a rod in the old motor so i swaped a f23a1 into it. The f23a5 that comes stock in them is non-vtec, whereas the new motor is. I ran the wires for the 3 wires for the vtec and the knock sensor wire correctly but it will not start. If i plug my old computer in it will start but run pig rich and have no power. The motor i put in it is from an automatic accord, and mine is a 5spd. why will my old computer start the motor but the new one will not? I even got a 5spd computer for the f23a1.

 

What is the new computer from?

 

Immobilizer.............

 

the computer is from a car at a junkyard that was in working order when it was pulled from the car... and i don't think it is the imobilizer because the motor will turn over and kinda half fire one or two times then just keep spinning. the only difference i can find is the plug on the distributor. The old motor had a different distributor that had the firing order start 180 degrees different than the new one... I spliced the wires up right on the new plug for the distributor too. Any ideas? I may try getting a new wiring harness from another 98 ex 5spd and hooking it all up.

 

Is the little key light flashing I would go with total mortal.

 

What you described is exactly what the immobilizer system does.

 

is there any way to bypass the immoblizer? I mean, if people can steal them, it must be possible...