v8killaz

i searched with no luck alot of people seem to have the problem but never update how it was fixed

heres the situation
d15b in a obdI del sol
car starts great, runs fine other than having very little power, idles fine, spark in all cylinders
cel is on for iat(not plugged), vtec(not plugged), o2(not plugged)
using a p72 ecu for now, but same thing with multiple ecu's.

the car seems to be lagging in power, timing is fine. I rev it in neutral or moving the car wont rev past 4k


im using a nonvtec harness for now.

anyone have an idea what it could be. I was thinking dizzy but we changed it temporary and same thing
im lost

v8killaz

bump

havok6969

your ecu is in limp mode, that means your ecu is looking for components and cant find it so it puts it self to safe mode so it prevents the engine from further dmgs. or something could be plug in a wrong pin in the obd1 connections

eg6stroker

ttt

v8killaz

been through about 10 ecu's same thing
unplugged everything and still the same thing

even disabled all the sensors through my neptune ecu still the same
i know its electrical but i seem to be lost at what it could be. grounds are good,
I do have a feeling its in limp mode but the map is good switched it out the other day, and the dizzy was switched temperarly and still same thing.

If i take off all the sensors and leave the main ones on

switched the engine harness too. could thee be a short before the engine harness

v8killaz

made a mistake this is a d15z motor
still the same problem

v8killaz

what dude
its not cheap it blows through gas like nothing
worse than my boosted y8

v8killaz

look bro diregard the ecu's and running open loop
it should run fine in open loop as well

we ran a neptune and every map their could be including the d15z map
that made absolutly no difference. we disabled o2 and vtec and everything still runs shitty and wont rev past 3k

ive got a video of it ill post up

YORSH

do you already check your ckp sensor???
when i bought my 95 eg with d15b8 engine didn't pas 3k and have no cel, because this sensor was unplugged

DCRB

you absolutely SURE timing is fine? i put my belt on a tooth off once and it looked fine but was gutless and wouldn't rev for ****.

KamikazeDR

Wich vtec code is trowing the ECU 21 or 22 if is the Vtec Pressure switch i have a trick so u cant get rid of this code just using a relay

v8killaz

i think you fail to read my post, ive ran the motor on its stock basemap countless times with no difference at all. and it doesnt matter what ecu i throw on it it should still at least run and rev past 3k. My neptune is in my other car and i cannot keep burning basemaps on it so im left using a p28. vtec has nothing to do with anything. ive manually engaged vtec and no difference in rpm just sound. I dont know why it blows through gas, thats what im trying to figure out it all relates to one problem.


22
i dont need to get rid of the code
i dont beileve it has anything to do with not revving past 3k and running shitty


did a compression test today also and came out good 180-180-160-180
checked timing dead on, checked the dizzy seems to be good

foo fighters

A BOOSTED Y8, B16A2, And your worried about sohc v-tec's retarded little brother??? i've never had a turbo or dohc v-tec but if i did, i wouldn't be cuttin corners now by getting a d15z1. i don't have them and i still got the RIGHT d15b. Your not going to get good answers if you UNPLUG O2 sensor,oil Pressure switch,then troubleshoot. But if you think you dont need 'em...

v8killaz

yeah i know wont get good answers on h-t
i need to join realhommadeturbo lol

but the cars not mine its my freinds, i tell him its junk he thinks it worth like 3k i wouldnt even pay 300 for it
he says if i fix it i can borrow it. i need to fix it so i can build my d series

djslim23

makes no sense..you went through 10 ecu's before making sure everything was hooked up right? this thread is pointless. why dont you fix all your CEL's before posting a Help me please thread....lazy ***

H22AFerio

are you running a non-vtec Dizzy? I was rinning a not vtec dizzy when I did my mini-me swap back in high school and it would not rev past 4k then I swapped on a vtec dizzy and bam it worked fine.

v8killaz

well i ran a non vtec ecu and still the same thing
if i run a vtec ecu there is absolutly no difference

v8killaz

cels are on because i dont have them plugged in. they turn off as soon as i plug them in and reset the codes. obviously making no difference whatsoever. i have a neptune and s300 and disabled every sensor and still the same.....
dumb ***

Jimster480

a d15z is a VTEC-E Motor. Without it turning on the VTEC to open the 4th valve, the motor is going to have serious issues with power and its ability to rev. Also it doesnt matter what ECU you have, because if you have the same sensor problem then each ECU will just go into limp mode.

v8killaz

yeah i understand
we had the d15z map and same stuff happened. no codes at all. we had o2 disabled from neptune though

v8killaz

here i got a youtube video
http://www.youtube.com/watch?v=NrFxsJ7V8es

y5dunk

i have a 96 civic coupe hx. it has the d16y5 setup that comes stock. i am wanting to put a y8 head that i have on my y5 block, what do i have to do to do that and my car run right?

H22AFerio

No Im talking about the distrubtor not ecu.

Jimster480

Why do you want to put the Y8 head on there? the Y5 head only makes 10HP less and gets alot better fuel economy.

v8killaz

yeah im pretty sure im running a vtec dizzy