Hello everyone. I hope somebody can help. 92 Civic CX. I initially had the stock 8 valve cx motor (d15b8 I think) and blew head gasket, so, I swapped it out with a 16 valve DX motor (d15b7 ?). I bought one of those Japanese used motors. I reused all my cx parts for the swap. When it started up, it seemed to idle ok, but, it bogs out when I give it gas. So, I looked at some pictures and noticed that the intake was bigger for the 16 valve, so, I got a bigger intake from the junk yard and now it is even worse. Now it barely even keeps an idle. Does anybody know if I was supposed to swich out ECU's or have any clues as to what I did wrong? Any help would be beneficial. I also live in California so I think my ECU has smog equiped stuff. Help, I'm stuck carpooling with my wife.

 

is just did the same exact swap you did..and its doing the same thing that your motor is doing...my mechanic crew is working on the problem right now....but try this out....get new spark plugs and wirers....make sure the firing sequence is right...and recheck all the plugs and wiring harness attachments....but hey i got a question for you.....what is the firing sequence for that engine...the one you just swapped in there......is it 1-3-5-4?...lol the funny thing is..is i have a 92cx hatch..lol

 

Good to know. I check firing sequence when I get home. I'm actually "working" right now.

 

Turdomatic5000
that's quite an interesting name you got there
Anyhow, with the INTAKE Mani swap you may have vaccuum leak somewhere check with a bottle of carb cleaner to see if the engine responds any where you spray it around the mani
check all grounds

PS Carpooling with the wifey can't be all that bad
ROADHEAD

 

check your tps and iac plugs, those two might be switched.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by youngun &raquo;</TD></TR><TR><TD CLASS="quote">what is the firing sequence for that engine...the one you just swapped in there......is it 1-3-5-4?...lol the funny thing is..is i have a 92cx hatch..lol</TD></TR></TABLE>
you have to be kidding, there is not 5 cylinders in the honda engine! but no the order is 1-3-4-2 i think

 

is it throwing any cels???
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2lua &raquo;</TD></TR><TR><TD CLASS="quote">check your tps and iac plugs, those two might be switched.</TD></TR></TABLE>
also check this out!!!/\/\

 

I did switch connectors, tps/iac last night and it allowed me for a brief moment to rev my engine a little higher initially then only to end up farting out. I don't know what your talking about when you say cels. I also did not get a chance to recheck firing order tonight seeing as family(inlaw) drama prevailed. That 5th cylinder is super hot youngun(j/k, I knew what you were gettin at).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by youngun &raquo;</TD></TR><TR><TD CLASS="quote">....but hey i got a question for you.....what is the firing sequence for that engine...the one you just swapped in there......is it 1-3-5-4?...lol the funny thing is..is i have a 92cx hatch..lol</TD></TR></TABLE>

yeah thats the firing sequence on my car

 

firing order is correct. I was hoping is was something like that but no luck. Damn. Also roadhead would be great but I don't think the kids are into it.

 

I went and spent the cash on dx ecu. It did make any difference whatsoever. I'm about ready to set the ****** thing on fire.

 

check all your grounds and vacuum hoses. I had simular problem. I changed every thing, plugs, fuel filter etc.... and it turned out it was just a loose ground strap. I was a little peaved.

 

OK, I'll check again. I'll spray carb cleaner all over the damn thing. Hopefully it'll catch fire.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turdomatic5000 &raquo;</TD></TR><TR><TD CLASS="quote">firing order is correct. I was hoping is was something like that but no luck. Damn. Also roadhead would be great but I don't think the kids are into it.</TD></TR></TABLE>

Roadhead from Kids I know annoying little module that loves to break on hondas. Try taking out your Ignition Control Module (ICM) and have it tested at autozone. My b16a used to miss fire because of that POS module.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2lua &raquo;</TD></TR><TR><TD CLASS="quote">check your tps and iac plugs, those two might be switched.</TD></TR></TABLE>

and your TPS and your MAP SENSOR could be backwards happened to me when i had my d15b swap in