Compression
Check engine mechanical condition with a compression gauge, vacuum gauge, or an engine analyzer. See engine analyzer manufacturer's manual for specific instructions.
| WARNING | DO NOT use ignition switch during compression test. Use a remote starter to crank engine. Fuel injectors on many models are triggered by ignition switch during cranking mode, which can create a fire hazard, contaminate engine's oiling system or cause damage to catalytic converter. |
Check compression pressure with engine at normal operating temperature, all spark plugs removed, throttle valves wide open and at specified cranking speed. Crank engine at least 6 revolutions to determine engine compression. See ENGINE COMPRESSION table.
| Model | (1) (2) Standard psi (kg/cm 2 ) | (3) Minimum RPM | |
|---|---|---|---|
| Accord | (4) | 200 | |
| Civic | |||
| B16A2 Engine | 220 (15.5) | 250 | |
| Except B16A2 Engine | 184 (13.0) | 250 | |
| CR-V | 178 (12.5) | 250 | |
| Odyssey | (4) | 200 | |
| Prelude | 185 (13.0) | 250 | |
| S2000 | 228 (16.0) | 250 | |
| (1) Maximum variation between cylinders is 28 psi (2.0 kg/cm 2 ). (2) Minimum cylinder compression is 135 psi (9.5 kg/cm 2 ) (3) With Wide Open Throttle (WOT). (4) Information unavailable from manufacturer. | |||
| (1) | Maximum variation between cylinders is 28 psi (2.0 kg/cm 2 ). |
| (2) | Minimum cylinder compression is 135 psi (9.5 kg/cm 2 ) |
| (3) | With Wide Open Throttle (WOT). |
| (4) | Information unavailable from manufacturer. |
ENGINE COMPRESSION
Exhaust System Backpressure
Exhaust system can be checked using a vacuum or pressure gauge. Remove front (primary) Heated Oxygen Sensor (HO2S). Connect a 0-5 psi pressure gauge, and run engine at 2500 RPM. If exhaust system backpressure exceeds 2 psi (12 kPa), exhaust system or catalytic converter is plugged.
If using a vacuum gauge, connect vacuum gauge hose to intake manifold vacuum port and start engine. Observe vacuum gauge. Open throttle part way and hold steady. If vacuum slowly drops after stabilizing, check exhaust system for restrictions.
FUEL SYSTEM
| WARNING | Always relieve fuel pressure before disconnecting any fuel injection-related component. DO NOT allow fuel to contact engine or electrical components. |
Accord, Odyssey & S2000
Disconnect negative battery cable. Remove fuel filler cap. On S2000, remove intake manifold cover. On all models, using a wrench, loosen fuel pulsation damper one full turn. Cover damper and wrench with a shop towel. Replace copper washers on fuel pulsation damper before tightening.
Civic & CR-V
Remove negative battery terminal. Remove fuel tank filler cap. Place a shop towel around fuel filter. Using one wrench to hold filter and other to loosen banjo bolt at top of fuel filter one turn. Replace copper washers on banjo bolt before tightening.
Prelude
Remove negative battery terminal. Remove fuel tank filler cap. Place a shop towel over banjo bolt at fuel rail. Slowly loose banjo bolt at fuel rail one full turn. Replace copper washers on banjo bolt before tightening.
FUEL PRESSURE
Note. If vehicle starts and runs, fuel pump PGM-FI main relay is okay.
Spark
On vehicles equipped with a distributor, check for spark at secondary ignition coil wire and each spark plug wire using a spark tester. Check spark plug wire resistance on suspect wires. Resistance should be less than 25,000 ohms at 68°F (20°C).
IGNITION CONTROL MODULE
Note. If MIL comes on, check for Diagnostic Trouble Codes (DTCs). See appropriate SELF-DIAGNOSTICS article. Before preforming IGNITION CONTROL MODULE INPUT TEST, ensure ignition, fuel and emissions systems are operating properly. Ignition Control Module (ICM) is located in distributor housing. (Схема №4)- (Схема №9).
Note. Manufacturer does not provide tests for ICM, they provide a series of input test to ensure rest of system is working properly before replacing components. If all tests check okay, ICM should be replaced.
IDLE SPEED & IGNITION TIMING
Ensure idle speed and ignition timing are set to specification. See appropriate IDLE SPEED & IGNITION TIMING table. For adjustment procedures, see ON-VEHICLE ADJUSTMENTS article. Before checking or adjusting idle, ensure MIL has not been reported on, timing is correct, and that spark plugs, air cleaner and PCV system are okay.
For further information on idle speed adjustments and specifications, see ON-VEHICLE ADJUSTMENTS article.
| Application | Step "A" RPM | Step "B" RPM | |
|---|---|---|---|
| Accord | |||
| 2.3L | 650-750 | 720-820 | |
| 3.0L | 630-730 | 630-730 | |
| Odyssey | 680-780 | 680-780 | |
IDLE SPEED SPECIFICATIONS (ACCORD & ODYSSEY)
| Step "A" RPM | Step "B" RPM | Step "C" RPM | Step "D" RPM |
|---|---|---|---|
| 400-500 | 650-750 (1) | 700-800 | 760-860 |
| (1) Canadian 700-800. | |||
| (1) | Canadian 700-800. |
IDLE SPEED SPECIFICATIONS (CIVIC B16A2)
| Step "A" RPM | Step "B" RPM |
|---|---|
| 650-750 | 760-860 |
IDLE SPEED SPECIFICATIONS (CIVIC D16Y5 ENGINE CVT)
| Application RPM | Step "A" RPM | Step "B" RPM |
|---|---|---|
| D16Y7 A/T (1) & D16Y8 A/T (1) | 650-750 | 760-860 |
| D16Y7 M/T (1) | 620-720 | 760-860 |
| D16Y7 & D16Y8 (2) | 700-800 | 760-860 |
| (1) Specification For USA Models. (2) Specification For Canadian Models. | ||
| (1) | Specification For USA Models. |
| (2) | Specification For Canadian Models. |
IDLE SPEED SPECIFICATIONS (CIVIC D16Y8 A/T & D16Y7 ENGINES)
| Step "A" | Step "B" | Step "C" | Step "D" |
|---|---|---|---|
| RPM | RPM | RPM | RPM |
| 400-500 | (1) | 700-800 | 760-860 |
| (1) Idle speed should be 620-720 RPM on USA models, or 700-800 RPM on Canadian models. | |||
| (1) | Idle speed should be 620-720 RPM on USA models, or 700-800 RPM on Canadian models. |
IDLE SPEED SPECIFICATIONS (CIVIC D16Y8 ENGINE M/T)
| Step "A" RPM | Step "B" RPM | Step "C" RPM | Step "D" RPM |
|---|---|---|---|
| 430-530 | 680-780 | 680-780 | 720-820 |
IDLE SPEED SPECIFICATIONS (CR-V)
| Step "A" RPM | Step "B" RPM | Step "C" RPM | Step "D" RPM |
|---|---|---|---|
| 500-600 | 650-750 | 740-840 | 740-840 |
IDLE SPEED SPECIFICATIONS (PRELUDE)
| Step "A" RPM | Step "B" RPM |
|---|---|
| 750-850 | 850-950 |
IDLE SPEED SPECIFICATIONS (S2000)
| Application | Specification | |
|---|---|---|
| Accord | ||
| 2.3L | 10-14 @ 650-750 | |
| 3.0L | 8-12 @ 630-730 | |
| Civic | ||
| B16A2 Engine | (2) (3) 14-18 @ 650-750 | |
| A/T Or CVT | (2) (3) 10-14 @ 650-750 | |
| M/T | (2) (3) 10-14 @ 620-720 | |
| CR-V | (3) 14-18 @ 700-800 | |
| Odyssey | 8-12 @ 680-780 | |
| Prelude | (3) 13-17 @ 650-750 | |
| S2000 | 3-7 @ 750-850 | |
| (1) Check in no-load condition (headlights, blower motor, rear defogger, A/C and cooling fan off) with M/T in neutral or A/T in Neutral or Park. (2) Canadian specification is 10-14 @ 700-800. (3) With SCS service connector (7PAZ-0010100) connected to 2-pin service check connector located under passenger side instrument panel. | ||
| (1) | Check in no-load condition (headlights, blower motor, rear defogger, A/C and cooling fan off) with M/T in neutral or A/T in Neutral or Park. |
| (2) | Canadian specification is 10-14 @ 700-800. |
| (3) | With SCS service connector (7PAZ-0010100) connected to 2-pin service check connector located under passenger side instrument panel. |
IGNITION TIMING (DEGREES BTDC - RED MARK @ RPM) (1)
SUMMARY
If no faults were found while performing BASIC DIAGNOSTIC PROCEDURES, proceed to SELF-DIAGNOSTICS - INTRODUCTION article. If no hard codes are found in self-diagnostics, proceed to TROUBLE SHOOTING - NO CODES article for diagnosis by symptom (i.e., NO-START, LOW POWER, etc.), or intermittent diagnostic procedures.