efi - vtec wiring

8/3/2019 Efi - Vtec Wiring

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honda.com/ben/EFiring.php

EF Wiring B Ben Ogle

When o do a moo ap ino o EF o ae mo likel going o hae o do ome iing. If o hae a DPFI model

(dal poin fel injecion) o ill mo definael hae o do a DPFI => MPFI coneion, and if o ae ping a VTEC

moo in hee o ill hae o ie fo VTEC. I i a lo eaie han i look o ond. Thogho all hi i am aming

o ae aing OBD0.

When iing pleae e olde and hea hink bing. I make o iing la longe and look MUCH cleane. If o can

olde I hink o hold p off hi iing job nil o can (o ge one of o oldeing fiend o do i).

MPFI: what to do.

Yo ae going o e o ock engine hane a he bae of o "hbid" hane. No he engine hane ha came on

he moo, an Si o Hf hane (nle o ca i an Si o Hf), o a B18a hane (no een ih a B18a). Thi i a common

miconcepion. People ala an o e a ock MPFI hane. The poblem i ha i doen ok nle o an o

epin he conneco ha connec i o he ca hane. IMO ha old be a lo of ok.

The engine hane o go ih o moo i going o be ed fo pa. Yo need he injeco plg (I c he ie a fa

back in he dono hane a I can o I don hae o do an lenghening), he injeco eio plg (don een c i off he

injeco plg, j ace i back), and he diibo plg. In addiion o he plg off he dono hane o need an injeco

eio bo. Thi bo can come o of an OBD0 ciic o inega.

No ha o hae all he ff le ge o iing. I like o do all he engine hane ff fi o ha ho I'm gonna ie i.

Keep in mind ha hi i MUCH eaie o do ih he moo o of he ca.

Engine:

Connec he ello ie on he DPFI hane o he bon ie on he injeco plg fo he #1 clinde.Connec he ed ie on he DPFI hane o he ble ie on he injeco plg fo he #3 clinde.

Rn he ed ie on one of he injeco plg o ECU pin A3 fo he #2 injeco. I all like o n hi ie ino he

pa ide engine-o-ca plg (big hie one) hen do he ohe ide hen I do he ineio iing.

Rn he ello ie on one of he injeco plg o ECU pin A7 fo he #4 injeco. I all like o n hi ie ino

he pa ide engine-o-ca plg (big hie one) hen do he ohe ide hen I do he ineio iing.

Connec he 2 ello/black ie on he DPFI hane (fom he old injeco) he ello/black ie on he injeco

eio plg.

If o c he injeco plg off he injeco eio plg hen o hae o econnec he ed/black ie on he

eio plg o he injeco plg.

De-pin he Diibo plg fom he MPFI hane (ecep he ble geen and ble/ello ie. C hoe a oill e hem lae) and WRITE DOWN hich colo ie en hee. Then de-pin he DPFI diibo plg and

p he MPFi plg on o DPFI hane. Make e he colo ae he mach p o ha o oe don. Thee

ae 2 hie coloed ie and he can eail be mied p. So make e he hie ie ha i a "lone" (no in a

gop of 4) i a "lone" hen o e-pin he MPFI plg (I need ome pic, heh).

Rn he ble/geen ie on he di plg o ECU pin C1 fo he clinde poiion eno. I all like o n hi ie

ino he pa ide engine-o-ca plg (big hie one) hen do he ohe ide hen I do he ineio iing.

Rn he ble/ello ie on he di plg o ECU pin C2 fo he clinde poiion eno. I all like o n hi i

ino he pa ide engine-o-ca plg (big hie one) hen do he ohe ide hen I do he ineio iing.

Lenghen he TPS and IACV ie. Alo, o need o ap he geen/hie and ello/hie ie on he TPS plg

a he MPFI hole bodie oae in he oppoie diecion of he DPFi one.


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Thee ill be 3 plg of he eac ame pe hich ae eail mied p. Thee plg ae fo he IACV (blk/el and

bl/el), he IAT (lile hie eno on he IM; oange/el and gn/hie), and fo ome DPFI eno (blk/el and

oange). The plg ih he blk/el and oange ie i NOT ed. Yo can c i off o le hang o haee.

ECU plugs:

Connec he oange ie on C1 o pin B10. Yo can eihe de-pin C1 and ap i oe o c C1 and olde i ono

a ie o p in B10.

Connec he hie ie on C2 o pin B12. Yo can eihe de-pin C2 and ap i oe o c C2 and olde i ono a

ie o p in B12.

Rn a ie fom C1 o he ble/geen ie on he di. If o an he ble/geen ie ino he pa ide plg hen hi

i e ea.

Rn a ie fom C2 o he ble/ello ie on he di. If o an he ble/ello ie ino he pa ide plg hen

hi i e ea.

C he ie a A3 and n a ie fom A3 o he ed ie on he #2 injeco plg. If o an he ed injeco ie

ino he pa ide plg hen hi i e ea.

C he ie a A7 and n a ie fom A7 o he ello ie on he #4 injeco plg. If o an he ello injeco

ie ino he pa ide plg hen hi i e ea.

If o ae moe he ial pe hen hi i fo o. (Big hank o eilkid fo leing me e hi).

VTEC iring.

If o goa b16, b18c, o l/ec and ae nning a PR3 o PW0 o hae o ie fo VTEC. Thi i VERY ea. The be

hing o do, IMO, i o make a ne hane j fo he VTEC ie. I all find a 4 o 6 pin male/female plg combo

fom one of he hanee ha I hae and go fom hee. If o don hae an hanee floaing aond hen a jnkad i

definael hae one ha o can pll plg fom. In he ca I'e ied hi plg combo eide on he clip (e hee i een

a clip fo hi plg. The ee hinking of ap g!) igh ne o he big hie pa ide plg. Wha o do i n he

ie fom he ECU o one end of he plg (he end ha clip ono he clip), hen make an engine hane ih all he ie

coneging ino he ohe end of he plg. Hee a pic of ha "VTEC plg."


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Engine hane.

Hook up the VTEC solenoid. Its a green ire ith a single connector on our OBD0 VTEC harness.

Hook up the VTEC oil pressure sitch. It is a 2 pin plug near the VTEC solenoid. One of the pins is for ground (the

black one) and the other goes to the ECU.

Hook up the Knocksensor. This is on the back of the block and has a plug eactl like the oil pressure sitch ecep

it onl uses 1 of the 2 ires in the plug. The knock sensor ire is supposed to be a shielded ire so use a shielded

ire.

Hook up the 2nd O2 sensor. Yes ou need it. It is also supposed to be a shielded ire.

Pic of the VTEC solenoid and the oil pressure sitch:


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Ca hane.

Rn he ie fom he ECU o he plg ha I alked abo ealie and make e he ie mach p.

Pin Fncion

A8 VTEC olenoid

B5 VTEC oil pee ich

B19 Knockeno

C8 Second ogen eno

Home

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efi - vtec wiring

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