i have a 93 civic coup just hocked up a ls vtec with b16 head obd2 everything but my ecu that is 99-00 will not fit my ecu plugs in the car so what do i do next?

 

buy obd1 ecu, socket it, tune it, problem solved.

 

the 99-00 ECU will not run the LS/VTEC very well anyway.
Better off with an OBD1 ECU (P30, P28, converted P06) and have the car tuned.

 

do i need to change sensors back to obd 1

 

nope, I (and many others) have ran an OBD2 engine on an OBD1 ECU with zero problems.
as long as the sensors run to the right locations at the ECU you're set.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CompleteSR06 &raquo;</TD></TR><TR><TD CLASS="quote">i have a 93 civic coup just hocked up a ls vtec with b16 head obd2 everything but my ecu that is 99-00 will not fit my ecu plugs in the car so what do i do next?</TD></TR></TABLE>

I don't know what the other guys are talking about really.

The problem is the plug on your car is OBD-IIb, and the engine's ECU is OBD-IIa. The plugs are different. You need an OBD-IIb to OBD-IIa conversion harness.

Here's one:
http://www.jdmshit.com/ecu/index.html
(scroll 4/5 of the way down the page)
OBD-2B to OBD-2A Harnesses
Next Day Air -- $119 shipped
2nd Day Air --- $110 shipped

You can probably find one used for cheaper.

The other option is to get an OBD-IIb to OBD-I conversion harness and run a chipped OBD-I ECU. With the chipped ECU you can run any basemap on it and it can be tuned via dyno tune.

The only downside to that method is that if they have to do computer scans on your car if it's OBD-II then it won't read the ECU because it's OBD-I. So if they check the ECU for CELs upon inspection that won't work.

I don't know what ECU you're using but if it's the stock LS ECU, it's not flashed the VTEC won't engage.