I bet you don't know the answer to this question....
 

because nobody else does. Ok, here is my problem. I have a 94 Civic DX (non vtec) with a P06 ECM. I put a P28 ECM (vtec) in it and it throws a cel(well duh). Of course it is throwing the vtec pressure cel because I don't have vtec. I need to know what wire on the ECM monitors vtec pressure. I need to hack that wire so the ECM thinks it has pressure and stops throwing me these damn codes and leaning me out at 6 psi. That really pisses me off when I am at like 6000 rpm and my a/f guage disappears and the motor falls on its face. Please help me with any information you can. Either a site that might have the P28 ECM layout or a guy that has this same problem. I need anything.... :( :'(
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Re:I bet you don't know the answer to this question....
 

as for the wire. look at the VAFC documentation, since it lists what wire to tap into to work the vtec. jsut a thought.

Re:I bet you don't know the answer to this question....
 

Good call you bastard :P I have been looking at the S-AFC instructions because I knew they had some of the ECM pinouts labeled. I didn't even think to check the V-AFC diagram. Thanks man. I hope I can actualy hack that thing to work with my non vtec. Has anybody ever put a P28 into there non vtec car? I thought it was a very common thing to do. I wonder how they got the ECM to think the vtec has pressure? I'm going to try a ground and see if that works since most senders use a ground as the source. I am hoping it isn't a variable positive voltage. That would require some stupid things to be done. Anyways, thanks for the help. I'll post what happens just incase someone else runs into this problem.
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Re:I bet you don't know the answer to this question....
 

A thread halfway down the page w/ a P28 pinout....

https://www.homemadeturbo.com/forum/...;threadid=3537

Re:I bet you don't know the answer to this question....
 

I had already looked at that for about an hour and it just doesn't match up. I don't think that is a P28. It also does not show the vtps or any sign of vtec for that matter. Thanks for the help though......
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Re:I bet you don't know the answer to this question....
 

Whats is vtps? Are you talking about Thottle position sensor voltage?

Looks P28ish to me. I see Vtec, mpfi, obd1, correct dist.....

Re:I bet you don't know the answer to this question....
 

Hehe, no I meant vtp sw I think. (vtec pressure switch. Maybe I am missing where it is listed on the P28 diagram, but I don't see it. It still doesn't match my P28. Hell, I don't know. This dude sold me this knowing my car was a non vtec and didn't bother to tell me it was going to be a mother fucker to rig it to work right.
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Re:I bet you don't know the answer to this question....
 

D6 will be VTM, the pressure switch. Since it's open now, might want to ground it?