92 VX CA to Fed conversion gone wrong! - Fuel Economy, Hypermiling, EcoModding News and Forum

jttriesch · 10-12-2010, 01:00 PM

Hello friendly modders,

I have been putting this off for 3 months now, but now I realize I need your help! The mechanics here in CA are dumbfounded and don't understand VTEC-E!

My 92 CA civic VX has been a fun project over the last few years, but I have not been able to get lean burn to work! Here is some history that may help out:

I bought the Civic with 150,000 miles. Shortly after the head blew and the transmission was grinding so I bought a Japanese replacement engine from Nippon Motors in LA. The engine was stamped D15B and the trans was a junkyard vx/cx replacement. I kept the same CA intake manifold and bought a new o2 sensor and p07-A00 (fed) ecm.

After I plugged in the FED ecm the car would stutter horribly and slow with no power to the wheels when the throttle pushed down less than halfway. This happens in 2 - 5th gear, but not in first. I have to give it way more gas to make it jump back to regular driving, and as soon as I shift up, it does the same thing unless I give it way more gas. It is impossible to drive this way. I thought that the ecm might be bad, so I bought another one and it is the same story.

The info from one of the tutorials said that with a 92 CA VX the only thing needed for the conversion is a FED ecm:

http://ecomodder.com/forum/showthrea...n-vx-7295.html

I now have the stock CA ecm in there just so I can drive it. Is there something I'm missing? I average about 32-44 mpg with the CA ECM. Please help!

SVOboy · 10-12-2010, 02:53 PM

To make the conversion you should need a 5-wire wideband o2 sensor made by NGK as well as the wiring from that to the fed. p07. Perhaps this is what you're missing.

jttriesch · 11-06-2010, 05:52 PM

Quote:

Originally Posted by SVOboy

To make the conversion you should need a 5-wire wideband o2 sensor made by NGK as well as the wiring from that to the fed. p07. Perhaps this is what you're missing.

I have the P07 and the 5 wire o2! I lose power when the p07 is hooked up. Im going to replace my IACV, due to a crazy idle bounce and check the vtec solenoid. My engine has VTEC-E stamped on the valve cover. I'll re-post as soon as I figure anything out!

autoteach · 11-06-2010, 05:59 PM

Does it function properly with the CA computer?

jttriesch · 11-08-2010, 02:20 PM

Quote:

Originally Posted by autoteach

Does it function properly with the CA computer?

Yes it functions properly with the CA ecu. I have the 92 with the 5 wire o2, so it should simply work with a fed ecu swap. I got my info from:

http://ecomodder.com/forum/showthrea...n-vx-7295.html

autoteach · 11-08-2010, 08:44 PM

If you transfer all the wiring and the computer, then the only thing that could be holding you up is a sensor issue?