i have a obd1 DOHC ZC in a 1990 crx dx. i have made a new wire harness and have upgraded to obd1. i have tested each wire to each sensor and they all are correct. i have hondata installed and it links to the computer reads all the sensors and i can datalog and tune as i please. here is the problem. brand new motor, head, block, dizzy, tps, wires, ect. its all new. i have spark and fuel and it started onces ran good but would not rev over 3800 rpm and it backed fired. almost like a 2 step. now it wont start at all. i replaced the ingtiner and coil. im stuck and at a lost. help please.

 

i rechecked my dizzy and its right. i only backfired when it got to 3800 rpm thats where it stops.

 

it still wont start

 

you dont have the 2 step set in the hondata do you? Its based on speed so if your car is sitting still and you try to rev it, it will hit the 2 step.

 

no i went and put a stock map in it. i just dont understand it started once and it idled fine and reved fine untill 3800 or so, and now i cant get it to do anything.

 

I would start off with compression test, then check the timing. Put it at TDC and make sure the cams are lined up the way they are supposed to. You never know, could have a bad cam belt tensioner.

On another note, this was about 8 years ago, but I put a d16z6 motor into my 91 hatch. My first problem was getting fuel to it. Had to rewire some stuff. But my second problem was the distributor. I was getting fire but it was at the right time. I had to convert back to the odb0 distributor. Which the zc is obd0 so I doubt thats your problem. Just throwing it out there. But if you got fuel, engine itself is in time, and the distributor is firing when the engine needs it to. It should run. Does it have one of those injector resistor boxes?

 

no resitor box. i used high ohm injectors because i didnt want a resitor box. the dizzy i have is for a obd1 zc so it should work. thanks for the input i ll look at the timing again.

 

i checked the timing and it was perfect. i found out it was a bad dizzy. the brand new one that i bought wasnt working. i took the one of my single cam and put it on and it started right up and worked great. go figure.