1998 HONDA INTEGRA ZC engine

Power Steering Pressure (PSP) Switch Signal (USA)
This signals the ECM when the power steering load is high.
ECM CONNECTORS
Check lor an open in the wire (PSP
SW line):1. Turn the ignition switch ON (ll).
2. Measure voltage between ECM
connector terminals C16 andA9.
A {32P1LGl{BRN/BLK)
c (31P}
PSP SWIGRNI
Wire side oI female termanals
PSP SwlTCH 2P CONNECTOR IC311I
PSP SW {GRNI
luupen r-{ r \wrRE 4rl
GND (BLK)
Wire side oI female terminalsi,
Inspection ot PSP switch signal.
Check lor an op€n in the wire (PSP
SW linel:1. Turn the ignition switch OFF
2. Disconnect the PSP swirch 2P
3. Turn the ignition switch ON (ll).
4. At the wire side, connect the
PSP switch 2P connector ter
minals No. 1 and No.2 with a
iumper wire.5. Measure voltage teNveen ECM
connector terminals C16 andA9.
ls there less than 1.0 V?
- Repair open in the wire be-
tween the ECM lcl6l .nd the
PSP 3witch.- Repai. open in BLK wire be'
tween the PSP switch and
G301.
ls there less than 1.0 V7Check the operation of the PSPswitch:1- Stan the engine2. Turn steering wheel to full
3. Measure voltage between ECM
connector terminals c16 andA9.
ls there battery voltage?
PSP switch signal is oK.{To page l1 t09)

ldle Control System
Fast ldle Thermo Valve (A/T model onlylFast ldle I nermo valve (A/ | mooel
Description
To prevent erratic running when the engine is warming
up. it is necessary to raise the idle speed. The fast idle
thermo valve is controlled by a thermowax plunger.
When the engine is cold, the engine coolant surround-
ing the thermowax contracts the plunger, allowing addi
tional air to be bvoassed into the intake manifold so that
the engine idles taster. When the engine reaches operat-
ing temperature, the valve closes. reducing the amount
of air bypassing into the manifold.
FAST IDLE THERMO
VALVE
VALVE
wAx
Inspection
NOTE: The fast idle thermo valve is factory adiusted; it
should not be disassembled.
1. Remove the intake air duct from the throttle body.
2. Start the engine.
3. Put your finger over the lower port in throttle body
and make sure that there is air flow with the engine
cold {engine coolant temperature below 86'F, 30"c).
LOWERPORT
lf there is no air flow, replace the last idle thermo
valve and retest.
Start the engine. Hold the engine at 3,000 rpm with
no load (in Park or neutral) until the radiator fan
comes on, then let it idle.
Check that valve is completely closed. lf not, air suc-
tion can be felt at the lower port in the throttle body.
l{ any suction is felt, the valve is leaking. Check
engine coolant level and for air in the engine
coolant system (see section 10). It OK, replace the
fast idle thermo valve and recheck.
5.
{1.0 kg.m,7.2lbftl
l
11-110
lL.

ldle Speed Setting
IDLEADJUSTINGSCREW
7.
6.Turn the ignition switch OFF.
Reconnect the 2P connectors to the IAC valve and
the EVAP purge control solenoid valve, then do the
ECM reset procedures.
Restart and idle the engine with no-load conditions
for one minute, then check the idle speed.
NOTE: (Canada) Pullthe parking brake lever up.
Start the engine, then check that the headlights are off.
ldle speed should be;
Bl88l €ngine:
Mfi750 i 50 rpm
A/T750150 rpm (in Park or neutral)
818C1 engine:750 i 50 rpm
818C5 engine: 800 i 50 rpm
NOTE: 81881, Bl8Cl engines - It the idle speed
increases to *1rpm, this means the EVAP system ispurging the canister. To stop the purging termporarily.
raise the engine speed above 1,000 rpm with the
accelerator pedal, then slowly release the pedal.
*1: 81881 engine
M/T: 820 i 50 rpm
Ay'T: 840 t 50 rpm
818Cl engine
850 I 50 rpm
(cont'd)
Inspection/Adiustmont
NOTE:
. When setting the idle speed, checkthe following items:- The MIL has not been reported on.- lgnition timing
Spark plugs- Air cleaner- PCV system
. (Canada) Pull the parking brake lever up. Start the
engine, then check that the headlights are off.
1. Start the engine. Hold the engine at 3,000 rpm with
no load (in Park or neutral) until the radiator fan
comes on, then let it idle,
Connect a tachometer.
Disconnect the 2P connectors from the ldle Air
Control (lAC) valve and the EVAP purge control
solenoid valve.
2.
5.
if the engine stalls, restan the engine with the accel
erator pedal slightly depressed. Stabilize the rpm at
1,000, then slowly release the pedal until the engine
idles.
Check idling in no-load conditions: headlights, blower
fan, rear defogger, radiator fan, and air conditioner
are not ope€tlng.
ldlo speed should be;
B188l engine:
Mlf480 :l 50 rpm
A/T480 i 50 rpm (in Park or neutral)
B18C1 engine: /t80 t 50 rpm
818C5 sngine:550 t 50 rpm
lf necessary, adjust the idle speed, by turning theidle adjusting screw.
After adjusting the idle speed, recheck the ignition
timing {see section 23). lf it is out of spec, go back
to steo 4.

ldle Control System
ldle Speed Setting (cont'dl
ldle the engine for one minute with headlights (Low)
ON and check the idle speed.
ldle 3peed should b€;
B1881 engine:
MIT750 t 50 rpm
750 i 50 rDm (in Park or neutrall
818C1 engine: 7501 50 nm
818C5 engine: 8001 50 rpm
Turn the headlights off. ldle the engine for one min-
ute with heater fan switch at Hl and air conditioner
on, then check the idle speed.
ldl. spood should be;
Bl8Bl ongin.:
M/T820 i 50 rpm
lvT840 t 50 rpm (in Park or neutral)
818C1 €ngino: 850 i 50 rpm
818C5 engino: 1,050 t 50 rpm
NOTE: lf the idle speed is not within specification.
see Symptom Chart on page 1!-36.
\
L
i
lIh:
lffiiltfl!
ffi
| 11-112
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I

Before connecting a new fuel tube/quick-connect fitting
assembly, remove the old retainer from the mating pipe.
With rhetabs pulled
apart, Pullthe retaineroff
New FUEL TUBE/OUICK.CONNECTFTflNG ASSEMBLY
3. Align the quick-connect fittings with the pipe, and
align the retainer locking pawls with the connector
grooves. Then press the quick connect fittings onto
the pipe until both retainer pawls lock with a click-
Ing souno.
NOTE: lf it is hard to connect, put a small amount of
new engine oil on the pipe end.
Connection with new retainer:
5.
Make sure the connection is secure and the pawls
are lirmly locked into place; check visually and by
pulling the connector.
RETAINER
Reconnect the battery negative cable, and turn the
ignition switch ON (ll) the fuel pump wjll run for about
two seconds, and fuel pressure will rise. Repeat two
or three times, and check that there is no leakage in
the fuel supply system.
11-117

The fuel supply system co
high pressure fuel pump, t
fuel pressure regulator. f
damper, and fuel delivery i
delivers pressure-regulated
cuts the luel delivery when
Fuel Supply System
System Description
consists of a fuel tank, in-tank
r, PGM-Fl main relay, fueffilter,
. fuel injectors, fuel pulsation
y and return lines. This system
ed fuel to the fuel injectors and
rn thq engine is not running.
Fuel Pressure
Relieving
Before disconnecting fuel pipes or hoses, release pres-
sure from the system by loosening the 12 mm banjo
bolt on top ol the fuel filter.
Do not smok€ while working on the tuel system,
Keep open flames or sparks away from you. work
arga.
Be sure to relieve fuel pressure while the ignition
swiich is ofl,
Make sure you have the anti theft code for the
radio, then write down the frequencies for the
radio's preset buttons.
Disconnect the battery negative cable from the bat-
tery negative terminal.
Remove the fuelfill cap.
Use a box end wrench on the 12 mm banjo bolt at
the fuel filter while holding the fuel filter with another
wrench.
Place a rag or shop towel over the '12 mm banjo
bolt.
Slowly loosen the 12 mm banjo bolt one complete
tu rn.
1 1-1 18
I
NOTE| Replace the washers whenever the 12 mm banjo
bolt is loosened or removed.
lnsDection
1. Relieve fuel pressure.
2. Remove the 12 mm banjo bolt from the fuel filter
while holding the fuel tilter with another wrench.
Attach the fuel pressure adapter bolt, 12 mm and
the special tool.
3. Stan the engine. Measure the tuel pressure with the
engine idling and the vacuum hose of the fuel pres-
sure regulator disconnected from the fuel pressure
regulator and pinched. lf the engine will not start,
turn the ignition switch ON (ll), wait for two sec-
onds, turn it off, then back on again and read the
tuel pressure.
Pressuro should be:
Bl8Bl engire:
270 - 320 kP. (2.8 - 3.3 kgl/cm'.40 - 47 psi)
818C1, 818C5 engines:
320 - 370 kPa (3.3 - 3.8 kgt/cm'. 47 - g psi)
12 mm
FUEL FILTER

I
Fuel Supply System
Fuel Injector (cont'dlFuel Pressure Regulator
Description
The fuel pressure regulator maintains a constant fuel
pressure to the fuel injectors. When the difference
between the fuel pressure and manifold pressure
exceeds 3.0 kgf/cm' (294 kPa,43 psi) IB18C'1,818c5
engines:3.5 kglcm'(343 kPa,50 psi)l, the diaphragm is
Dushed uDward, and the excess fuel is fed back into the
fuel tank through the return line.
CLOSED:
INTAKEMANIFOLDVACUUM
I1{TAKEMANIFOLDVACUUM
DIAPHRAGM
< IFUEL INLET\-
\
OIAPHRAGM
/4_\T-J FUEL INLET
9.
10.
11.
7.
8.
1t
Slide new cushion rings onto the fuel iniectors.
Coat new O-rings with clean engine oil, and put
them on the fuel injectors.
Insert the injectors into the fuel rail first.
Coat new seal rings with clean engine oil, and press
them into rhe intake manifold.
To prevent damage to the O-rings, install the luel
injectors in the fuel rail first, then install them in the
intake manifold.
Align the center line on the connector with the mark
on the fuel rail,
FUEL RAIL
MARKINGS
13.
14.
15.
16.
Install and tighten the retainer nuts.
Connect the vacuum hose and fuel return hose to
the fuel pressure regulator.
lnstall the connectors on the fuel injectors.
Turn the ignition switch ON (ll). but do not operate
the starter. After the fuel pump runs for approxi'
mately two seconds, the fuel pressure in the fuel
line rises. Repeat this two or three times, then check
whether there is any fuel leakage.
FUEL RAIL
FUEL

Testing
@G Do not smoke during the test. Keep opon
flames away lrom your work ar€a.
1. Attach a fuel pressure gauge to the service port of
the tuel filter (see page 11-118).
Pr€ssurs should be:
8188l €ngine:
27O - 320 kPa 12.8 - 3.3 kgl/cmr. 40 - 47 psil
818C1, 818C5 engines:
320 - 370 kPa (3.3 - 3.8 kgrf/cm,, 47 - 54 psi)
{with tho fuol pfossure regulatot vacuum hose dis-
connected and pinchsd)
FUEL PRESSURE GAUGE074t 6 - 004{1001
ADAPTER BOIT, 12 mm(9txt08-PD6-0101
Reconnect the vacuum hose to the fuel pressure
regulator.
Check that the fuel pressure rises when the vacuum
hose from the fuel pressure regulator is disconnect-
ed again.
lf the fuel pressure did not rise, replace the fuelpressure regulator.
VACUUM
FUEL PRESSURER€place.
AA
,il
I
I
Replacem6nl
@ Do not smoke while working on tucl sys-
tem. Keep open flamc away from your work area.
1. Place a shop towel under the fuel pressure regula-
tor, then relieve fuel pressure (see page 11-1'18).
2. Disconnect the vacuum hose and fuel return hose.
3. Remove the.two 6 mm retainer bolts.
NOTE:
. Replace the O-ring.
o When assembling the fuel pressure regulator,
apply clean engine oil to the O-ring and assem-
ble it into its proper position, taking care not to
damage the O-ring.
r1
i
i
11-121