I bought this 99 civic from a friend and i dropped a hx motor in it because that's all i had. I am running it off of a p2p SOHC vtec. I got rid of all codes but it repeatedly throws a code 1 and has a sort of a miss and is kind of slugish when vtec is ingaged or during full throttle. So i guess since this is an economy motor does anyone think that the ex ecu is dumping to much fuel or what? I was running just fine in the car it came out of which was a 98. Is why i could'nt use the stock ecu. If anyone has any helpful info please let me know!!!!!!!Thanx

 

Any suggestions anyone......really need help or info!!!!

 

P2P is the Ex ECU?

What O2 sensor are you using?

Yes - I think the Ex ECU is not exactly compatible with the Hx motor which is probably causing most of the 'performance' problems you're having.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EE_Chris &raquo;</TD></TR><TR><TD CLASS="quote">
Yes - I think the Ex ECU is not exactly compatible with the Hx motor which is probably causing most of the 'performance' problems you're having.</TD></TR></TABLE>

I agree entirely. The HX VTEC is different from the EX's, and I would bet that's where your problems are arising. Both are for economy, but the HX is more economy I think than the EX is.

 

Well maybe that's my problem.... Does antone in the NW area have a 99-00 HX (P2N) ecu for sale? If so please lmk.......253 988 1337