b18c vtir conversion into civic Eg Si 91. Problems.

[kraftycuts]

Ok so i have installed a b18c2 vtir engine into my civic eg si 91.
I am running stock b18c2 harness to my stock eg si harness, then to a 0bd1 to 0bd2a conversion harness to a dc2r ecu.

Ok so here are the list of problems i have so far.

Eratic idle- the car starts then idles at around 200 - 500 rpm, when i push on the accelerator and rev to around 4000 rpm and let it drop, the car chokes and switches off.

Vaccum hoses- I'm not sure if i have plugged all the vaccum hoses in correctly. ok theres one from the canister to the throttle body, when i take this hose off, it seems like the idle stabilises.

Throttle body- Cable is to long and is abit loose.

Ecu- I'm running a dc2r ecu for a b18c2 vtir, will this pose any problems?

Fuel pump- I'm still running the stock eg si fuel pump, could this cause my engine to idle so badly, it feels as though the car is choking or not breathing right.

Ok so any help would be greatly appreciated.:D
Note: I have cleaned the IACV and the Throttle body before install.

laters
Royce

[dave_ed9]

Are you getting a check engine light? Any error codes? I would double check the vaccum lines configuration first of all. Your stock fuel pump should be fine to run the B18C2.

[kraftycuts]

ok cool. I have not checked codes yet. but all seemed fine.

[fatboyz39]

hmmm...check all sensors. Do a ECU check and see what codes it throws up.


Stock EG SI pump is more then enough. Definately sounds like a sensor not hooked up or not reading from the ECU.

[locote]

maybe u got stuffed sencors..
the ecu and harness wires are crossed

[Edgeauto]

Since its a ITR ECU it wont have IAB. Which vac hose from the canistor are you talking about? there shuold be 2 or 3. IMO it would be better to add VTEC and chip your OBD1 ECU or run an OBD1 P72, if you want to do mods it would make tuning alot easier.

[kraftycuts]

well the harness was already on the engine, and the sensors are all plugged in the right places... It might be a sensor or two... will have to check. any other ideas?

thanks

[tinkerbell]

maybe check that the Throttle sensor and MAP sensor plugs are not reversed...

[kraftycuts]

maybe check that the Throttle sensor and MAP sensor plugs are not reversed...

ok i'll give that a go.

[aus91integra]

is this a local motor or an import? also when was it last running? gaskets shrink or get brittle over time and will cause air leaks..

check what the other guys have listed above and also check your o2 sensor...

:thumbsup: good luck.. nothing worse then sorting through teething problems in a swap...

[kraftycuts]

yup i agree.. gaskets was changed during conversion. o2 sensor should be in good working conditions considering it worked a before i ripped the b16a out.

argh... i should take a vid and upload so people could diagnose the problem.

[Edgeauto]

Did you end up checking for codes? Is it OK off idle? Have you set your base idle? Is the canister hooked up to the purge control solenoid may you have purge all the time instead of only when cruising?

[[[d a n n y]]]

hm..royce ill come over to the workshop and have a look at it.

[kraftycuts]

turns out that the p73 ecu from an itr was causing the problem. it doesn't match well with the vtir engine that i put in there.

going to have to get the obd1 ecu and hondata to tune it to spec, does anyone have a spare obd1 ecu lying around ?

[barefootbonzai]

Bro it's not the ITR Ecu causing you the problem. It should run fine. The problems you're getting are exactly what you said in the first post. The vaccum line to the canister, either get that right or just block it off. That's what i did.

[tinkerbell]

i ran a P73 ITR ecu on my B20VTEC, after running a standard P72 VTiR one before that...

whoever tells you it is the ECU is kinda covering for other issues...

ie using OBD2 gear in an OBD1 car, or simply the vacuum lines routing...

[kraftycuts]

i see... adrian from toda performance had a look at it and said that the problem was with the ecu. cause the intake has two runners and the p73 won't be able to run the second runner, + i had an engine light on and when he plugged in his hondata ecu in it went away. what do you guys think?

[EGB18CT]

pretty sure its like what barefoot said its either ur vac or the ecu, i know ecu-man said once u cant use the itr ecu on vtir. Plus it cant control the runner. I suggest u get a p72 ecu,its obd1, and its easier to put hondata or whatever you want on it cos its obd1 and u only need to run i think 5-6 extra wires to the bay and the rest will plug and play. thats what im running on my gsr in eg gli

[kraftycuts]

yeah thats what i thought. thanks egb18ct, are you running hondata and how is that for you?

[EGB18CT]

not running hondata just stockecu atm.

[tinkerbell]

i see... adrian from toda performance had a look at it and said that the problem was with the ecu. cause the intake has two runners and the p73 won't be able to run the second runner, + i had an engine light on and when he plugged in his hondata ecu in it went away. what do you guys think?

the runners only effect the power band, not the idle that you seemed to have issues with, were these resolved with the Hondata??

and what was the code that the check engine light related to, why didnt you mention the CEL before?

[kraftycuts]

the runners only effect the power band, not the idle that you seemed to have issues with, were these resolved with the Hondata??

and what was the code that the check engine light related to, why didnt you mention the CEL before?

well i wasn't able to get the cel code cause the engine light was on all the time, even when i put the paper clip in, because of the continuous light, i couldn't pull a code.

yeah hondata is in with bandaid tune by adrian until i find a obd1 ecu. it did fix the eratic idle but the engine is still running rough.

[tinkerbell]

well i wasn't able to get the cel code cause the engine light was on all the time,


ROFL...

that usually means that the ECU is damaged!

no wonder it was having issues!

in future, if you ask for help regarding this sorta stuff - you should always mention things like Check Engine Lights...

[kraftycuts]

ROFL...

that usually means that the ECU is damaged!

no wonder it was having issues!

in future, if you ask for help regarding this sorta stuff - you should always mention things like Check Engine Lights...

hahaha. i thought it was my main relay stuffing up. thats why lol...ok thanks guys.

[tinkerbell]

well, at least you now know what to swap to get it running right ;)

you can use a non-dual-runner ECU and leave the runners fully open - or even remove the internals of it... but this will slightly hurt bottom end torque IIRC...

[kraftycuts]

i got the obd1 ecu and am going to run hondata in the following week, how many kilowatts do you think i'll hit with an stock b18c vtir with jdm 4-1, s2000 cat, itr bpipe, and 2inch muffler?

[nigs]

No dual stage intake = teh lose.

You don't get the kick.
I want the kick damn it :(

Vooorrmmm *insert Vtec here* BAAAARRRRRRRRRRRR

Crossover is already @ 4500-4800 T_T
Just makes a silly noise, car doesn't really go any faster.

It fails the crouch test.

My prediction for power output will be....115kw!