few questions about my swap [Archive]

krasyvy

09-01-2006, 11:19 PM

dual carb (d15z2) to d15b vtec swap

first question - where does this plug go. I think i removed it when i was attaching a few hoses now i cant find where it goes.

This is the drivers side of the engine bay.

http://www.ozhonda.com/gallery/watermark.php?file=500/2719IMG_0231.jpg

Next question. The thermostat wiring has this third brown wire that connects to nothing. Where is this spose to go? there are 2 wires going to the ground (as seen in pic) so it cant be part of the ground. Thermostat wires look intact. What could this be?

http://www.ozhonda.com/gallery/watermark.php?file=500/2719IMG_0236.jpg

COuld this be the reason my main relay is buzzing when i turn the key?
Any help would be appreciated guys. Thanks.

incoming

10-01-2006, 04:27 AM

just a question for ur 1st question

have u put the d15b motor into the engine bay already?... and using the existing loom to wire it back up??
or did u just unplug the clip from the dual carb and wanting to plug it back up?

krasyvy

10-01-2006, 08:15 AM

d15b is in already

engine loom is from the engine not from my carb

incoming

10-01-2006, 08:22 AM

hmm.. reason i asked is cos im helping a mate with similar swap

dual carb to d16y - i'll inform ya along the way!

bennjamin

10-01-2006, 11:31 AM

IMO 1st pic is a standard service connector or accessory connector - it hangs loose not connected to anything ( i have the same one in my Si)

krasyvy

10-01-2006, 11:38 AM

oh ok so in ur car it's not connected either?

that's good then. one problem out of the way

bennjamin

10-01-2006, 11:47 AM

nup , it sits below those other two doing nothing. Unless someobne can confirm i think its safe to say its not needed.

EuroDude

10-01-2006, 11:50 AM

IMO 1st pic is a standard service connector or accessory connector - it hangs loose not connected to anything ( i have the same one in my Si)

hmm ive never noticed that loose connector on my Si - may have a look l8r.

Weq

10-01-2006, 04:36 PM

that brown wire is another earth. put a round earthing connector thingy on it and bolt it down on the housing bolt.

krasyvy

10-01-2006, 05:28 PM

hey, i wired up my relay. checked all the points on the relay with a test light and everywhere that should show up as receiving 12v works except for the fuel pump..

the fuel pump should show 12v as soon as the key is turned twice correct?

as in the turn before starting the car?

howcome there is no 12v coming from this point on my main relay?

is my relay screwed?

can someone please confirm that the fuel pump is pin 7 on the main relay?

just look under ur dash....

thanks guys

iamhappy46

10-01-2006, 05:37 PM

Hey man,
That connector on my swap has a clip that goes into it to distribute power to injectors and IACV. Can you check the colour of the wires going into this open ended plug for me. or get a test light and check that the injectors/IACV are getting power to their +ve sides(yellow/black wire)
I agree with Weq about that wire being an earthing wire, they all earth to the thermo to remoce static electricity from the radiator fluid(stops electrolysis corrosion).

As far as the Main Relay goes, the earthing problem for the ECU might be this wire that is broke, so A7 & A8 may not be pulling down power to open the circuit for the fuel pump to power up.

Weq

10-01-2006, 07:58 PM

kkrazzy, u know what that wire i told u to earth, earths???? The fuel pump. LOL~! paypal me $10 for all the time i have saved you :)

krasyvy

10-01-2006, 08:39 PM

wtf?

i earthed everything...

it still wont send 12v to the fuel pump from the relay

ECU-MAN

10-01-2006, 08:50 PM

that connector is ment to have a cover that plugs back in, I belive it has pins inside that short them all together, you will find the wires are all yel/blk, these are all earth returns from the injectors and other sensors.

http://b16a2.kicks-ass.net/tech/PGMFI001.jpg

http://b16a2.kicks-ass.net/tech/PGMFI002.jpg

im also working on the main relay for you.

ECU-MAN

10-01-2006, 08:56 PM

with out the above you will have alot of problems

10-01-2006, 09:41 PM

you could diy that very easy.

cut everything off the harness and twist them together

krasyvy

10-01-2006, 10:26 PM

trying to start the car now..

would not having that cause my starter to not turn properly?

i can here the rotor spining but it doesn't sound like it's turning the engine over

just sounds like it's spinning on its own

ECU-MAN

10-01-2006, 10:34 PM

no it would not.

the starter should engage and crank the motor regardles

there is no way it will start with out that plug in that connector, or ness modification

krasyvy

10-01-2006, 10:36 PM

thanks mate - well do i only need a + from the battery for the starter to turn the motor?

cant figure out why the starter wont atleast crank the motor

ECU-MAN

10-01-2006, 10:39 PM

you need a decent earth from the ( - ) terminal of the batt to the block or gearbox.

and then positive directly from the batt to the stater motor solenoid then the crank signal ( pos )

krasyvy

10-01-2006, 10:46 PM

yep battery is earthed fine

+ to starter is also fine

all i hear is the rotor spinning

could it be main relay / wiring harness related?

ECU-MAN

10-01-2006, 11:05 PM

main relay has nuthing to do with starter motor

krasyvy

10-01-2006, 11:08 PM

any idea what it could be then?

basically it's only spinning, not cranking the engine

bennjamin

10-01-2006, 11:19 PM

is there spark and fuel ?

krasyvy

10-01-2006, 11:23 PM

no as in the starter motor doesn't turn the motor at all?

all i can hear is the rotor spinning..

it sounds different when it actually cranks the motor

i was told that there is a mechanism in the start which pushes the rotor in when its cranking the engine and then it comes back out when it's not in operational...???

bennjamin

10-01-2006, 11:27 PM

yes - it is spring loaded which "springs" forward and "catches" the edges of the flywheel , then spins it and starts the motor. When the motor is started ( or the key is let back ) it locks back into the normal position, clear of the flywheel.

I think the starter motor cant connect with the flywheel ?

krasyvy

10-01-2006, 11:29 PM

ok so possibly my starter is spinning but the spring to push it in isnt being activateD???

surely what activates that must be associated to the engine harness somehow?

bennjamin

10-01-2006, 11:34 PM

maybe starter is stuffed - you can DIY "rebuild" the carbon bushes inside ( as ECU MAN how to) - but it is associated to the engine harness.

(*btw ive got a couple of spare starters if u need one)

krasyvy

10-01-2006, 11:35 PM

yeh i'll hit u up if it ends up being the starter that is screwed.... thanks mate :)

i'll get my mate to check and double check all the wiring/ground/main relay and we'll then be able to properly trouble shoot the starter

Weq

11-01-2006, 02:43 PM

krazzy. have u earthed that wire i told you - that is the main earth for the fuel pump. u gotta get the basics going first. Put 12v on the solenoid, jump it from the main 12v that goes to the starter motor. Ur probably down on battery power, that will give the symptoms that u are describing. Charge her up.

krasyvy

11-01-2006, 02:58 PM

grounded the fuel pump and fed it 12v directly - works fine now..

any ideas on why the starter motor is just spinning and not cranking the motor?

Weq

11-01-2006, 03:35 PM

like i siad in the other thread. try and jump the starter. if that doesnt work, put a booster pack on ur battery, id say its lost charge

ECU-MAN

11-01-2006, 09:55 PM

ok so possibly my starter is spinning but the spring to push it in isnt being activateD???

surely what activates that must be associated to the engine harness somehow?

no its not

you have an internal fault with your starter motor

krasyvy

11-01-2006, 10:06 PM

yeh seems like it

as i said in my other post - i fed 12v to it directly and all it did was spin

i havent touched my starter in awhile since the swap nor damaged it

can it just break down just like that?

ECU-MAN

11-01-2006, 10:17 PM

just remove the starter motor from the car, and power it up on the ground with jumper leads, if it is ok you will see the end jump out.

is this the old starter from the old carbie engine

krasyvy

11-01-2006, 10:21 PM

yeh it is, would that be a problem?

its the same gearbox from the carby too

ECU-MAN

11-01-2006, 10:32 PM

it shoulnt be

put it this way
from how I know the starter operates
if its turning its pushing out the end gear, unless there is something broken in the starter motor.
thats why you should power it on the ground so you can see for youe self what is happening.

krasyvy

11-01-2006, 10:35 PM

good idea i will try that and let u know

so basically when i power it - the rotor should push out then spin correct?

ECU-MAN

11-01-2006, 11:20 PM

correct

iamhappy46

12-01-2006, 03:00 PM

Unbolt the starter motor from gearbox, have starter motor sitting on gearbox outer casing(for its earth point), get someone else to crank the motor over, you should see the little gear come out and start spinning. If it comes out fine, the starter motor is all good.

However, I have been checking some specs on the D15B VTEC flywheel, some people claim the flywheel has different dimensions to regular D15 series flywheels, so you may need the VTi starter motor if using the D15B VTEC flywheel. Anyone else confirm this?

Hopefully, the starter motor just needs new brushes in it.