Dasfinc

Finished up my Y8 mini me swap, and ironed out all my issues except for one.

The car starts and idles perfectly, revs smoothly and quickly in neutral or with the clutch in, but with the car under load below 5 grand it is stuttering and misfiring pretty badly, once it hits 5K and the cam phases, the car Takes off like a bat out of hell.

NO Check engine light, Isn't burning coolant or oil, Smokes a bit under load, but it just smells like its running pig rich.

I ASSUME I put the cam belt back on off a tooth, so that my timing is off, *This would explain why when Vtec kicks over and the valves are open longer on the intake side it'd make it 'closer' to being the right timing, and would obviously give more power and not miss-firing or anything. I do find it odd that it idles fine and revs fine without load if the timing is off...

Anyone have something of this nature happen to them before?

Car is a 92 CX with a D15B8 Bottom end, and a D16Y8 head, Yes the Oil jet has been Pulled, and Yes the ECU is correct, and AGAIN there is no CEL. some input would be massivily helpful

pix for clix:

JDM_SOHC

you sure you have the correct firing order for your wires??

Dasfinc

Yup, it wouldn't rev and idle smoothly if the wires were wrong.

Archidictus

Check your ignition coil.

Dasfinc

how would I test that?

The dizzy is still the original D15B8 dizzy that has worked on the original B8 head, and my B7 head in the past.

I did just replace the rotor in it during this swap, dunno if that could have an affect.

Also, out of curiosity, how could an ignition coil hurt only in low revs under load? *not well educated in ignition system of my car, just wiring, electronics, and mechanics

JDM_SOHC

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dasfinc &raquo;</TD></TR><TR><TD CLASS="quote">Yup, it wouldn't rev and idle smoothly if the wires were wrong.</TD></TR></TABLE>

wanna bet??

Dasfinc

Yea, I do honestly, Lol

There's no way the car could pull as strongly as it did over 5 grand if it was running on 3 pistons.

JDM_SOHC

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dasfinc &raquo;</TD></TR><TR><TD CLASS="quote">Yea, I do honestly, Lol

There's no way the car could pull as strongly as it did over 5 grand if it was running on 3 pistons.</TD></TR></TABLE>

I beg to differ... I had cylinders 4 and 1 backwards when i first did my swap a while ago, and my **** did exactly the problem you stated, except it was about 4 grand that it launched, i did a lil searching, rechecked all my wiring, an swapped those 2 wires, started car, ran flawlessly...

h22ek9forme

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dasfinc &raquo;</TD></TR><TR><TD CLASS="quote">Finished up my Y8 mini me swap</TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dasfinc &raquo;</TD></TR><TR><TD CLASS="quote">the car Takes off like a bat out of hell</TD></TR></TABLE>

doubtful

Dasfinc

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by h22ek9forme &raquo;</TD></TR><TR><TD CLASS="quote">doubtful</TD></TR></TABLE>

If you don't have anything useful to say, Shut the F*ck up.

Thank you and have a nice day

EG8R

Check your timing marks. Could be aff a tooth on the cam.

Just a suggestion.

hondaz6lx

not 100% sure but i would say u should not be using the b8 dizzy, and as for the misfire i would get a timing light and check the timing for sure.

Dasfinc

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EG8R &raquo;</TD></TR><TR><TD CLASS="quote">Check your timing marks. Could be aff a tooth on the cam.

Just a suggestion.</TD></TR></TABLE>

Thats what I suspect as I mentioned earlier.

Dasfinc

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondaz6lx &raquo;</TD></TR><TR><TD CLASS="quote">not 100% sure but i would say u should not be using the b8 dizzy, and as for the misfire i would get a timing light and check the timing for sure.</TD></TR></TABLE>

Dizzy is right, ECU is also tuned for it.

Anyone got a link to a cheap timing light?

Dasfinc

any other ideas?

JDM_SOHC

try using a friends dizzy to test and make sure yours is fine.... also, autozone rents timing lights here in FL so im sure wherever ur at should be no problem as well...

Dasfinc

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM_SOHC &raquo;</TD></TR><TR><TD CLASS="quote">try using a friends dizzy to test and make sure yours is fine.... also, autozone rents timing lights here in FL so im sure wherever ur at should be no problem as well... </TD></TR></TABLE>

My GF works at Autozone, I'll bring with one tonight when we work on the car to confirm its off a tooth, Thanks for the help

homemadeturbo

I have a timing light that works perfect you can have for $15 shipped if you want. I'm just up in Madison so I could get it to you quickly, send me a pm if you're interested.

evildc2

Do a compression test it might be a bend valve

Dasfinc

Valves are new, it just got done by a machine shop which replaced 2 that were bent, and re-did the rest of them.

Ser1N

iTrader: (1)

My mini me did that when i was running the wrong ECU (DX ECU) when i through in a P28 it ran nothing but perfect.

but thats just my exp.

The thing im having now i dont know if it relates one bit.

D15B8 = what size injectors?

using D16Y8(240cc) injectors with a d16y7 ecu is making my car run SUUUPER rich. ( still mini me but basically converted to non vtec and such for smog. the d16y7 injectors are 190cc &lt;--- i dont care what anyone else says personal exp says they are lower then 240. so im waiting now for the mail to come bring me my y7 ones.

what size injectors is your ecu meant to handle?

BTW mine is a y7/y8 swap

Dasfinc

I'm using a Chipped P05 specifically for my setup, and it was running fine before I blew the headgasket for the first time, so I don't think thats the problem, but thanks for the suggestion.

I've been told the Y7 is the ONLY engine that uses the 190's I think mine are 240's as well.

Regardless, I told the guys down at phearable that I was using stock injectors from my B7 head setup.

I switched to a B7 intake manifold/fuel rail when I went from an 8 valve to a 16 valve before my minime swap was done *Like a SUPER mini Me, Lol*

now I'm using a Y8 Intake mani, fuel rail, FPR, and still B7 injectors.

Dasfinc

Alright, corrected the timing on the car, and am still having this problem, after warming up it still idles and revs fine, but under load it gets worse untill its nearly undriveable.

I suspect my chipped ECU may not be right.

What injectors do D15B7's use 240cc like everything else?

Ser1N

iTrader: (1)

well apparently the size of the injectors on the b15b7 are 235

Honda 92-93 4 Civic SOHC 16V
1493cc D15B7 ------&gt; 235 &lt;------

Dasfinc

Instead of 240

That'd be odd. Where'd you get that statistic