We are have some major problems with a Dual Point to Multi Point injection on my friends 91 DX. we are used a 93 DX intake manifold and throttle body, 89 crx si ecu, and the stock dx wiring harness.
we wired the injectors to the resistor box that we picked up and to the ecu, we also extended the TPS and EACV wires to reach the trottle body. the car starts and their is gas going to all 4 injectors but its throwing a code #4 which is CKP sensor ( crankshaft postion sensor), also we now that we have to wire up the cylinder postion sensor but the article that we are using isnt to straight forward, we now that we have to use an si distributor plug but what is the pug to wire up the sensor, does any one have the ecu pinouts for a 88-91 DX and the dx and si distributor plug, can anyone help in finding a good article about the coversion that explains everything, im using the one from hybrid honda.com but its not that forward also the car startes but wont rev higher than 3,000, and it make wierd rubbing noise, idles funny but drives fine, please help

 

sounds like you didn't use the si distributor which you need for the internal crank angle sensor that tells the injectors when to fire - go to http://www.zcspeed for complete description for wiring the dx for a zc motor - it should work the same for yours as what you are doing is converting from dual point to multi point.

 

Don't forget to swap the two outer wires on the TPS connector.

 

Yea i had to figure that TPS **** out on my own when i dropped a B16 into my friends 88 CRX. It was running 4.5vdc with the throttle closed and less than .5 at WOT. It's really amazing how much two wires can **** ya off. Have fun, converting DPI to MPI. When i did it i just used all the stock wires built into the interior loom except for one for the #2 injector. Use the tandem valves (orange wire) line but be sure not to use the ground.... for some reason when you voltmeter the ground on ACC you get 12vdc. That's why the #2 injector was staying opened and was why i had to run a new wire for it.