Tune-Up - 4-cyl (canada) Dodge Aries I

SPECIFICATIONS

Note. Refer to specifications covered in adjustment procedures.

IDLE RPM

To perform all idle speed adjustments on Canadian vehicles not equipped with Spark Control Computer (SCC), disconnect and plug vacuum hoses from carburetor at heated air temperature sensor and at OSAC valve (if equipped). Remove air cleaner. Proceed with idle speed adjustments

HOT (SLOW) IDLE RPM (1.6L & 2.2L CARBURETED)

Note. 1.6L and 2.2L carbureted engines with air conditioning are equipped with either a vacuum kicker or a solenoid kicker. It is not necessary to adjust air conditioning idle speed but kicker operation should be checked.

Air Conditioning Kicker Check

1. Start engine and warm to normal operating temperature. Set temperature control lever in coldest position. The kicker should move in and out as the A/C compressor clutch cycles on and off.
2. If the kicker does not move in and out, check kicker system for vacuum leaks or electrical problems and repair as necessary. If kicker still does not operate, replace kicker. Proceed to Curb Idle Speed adjustment.

Curb Idle Speed

1. Ensure that ignition timing is properly adjusted. Disconnect and plug vacuum connector at the Coolant Vacuum Switch Cold Closed (CVSCC). Unplug connector at radiator fan and install a jumper wire so that fan runs continuously.
2. Disconnect PCV valve from rubber connector and allow valve to draw in fresh air. Connect tachometer to engine. Ground the carburetor switch with a jumper wire.
3. Disconnect O2 system test connector located on left fender shield on vehicles equipped with Holley 5220 carburetors. Start engine and warm to normal operating temperature. Adjust idle speed using idle speed screw (vehicles without A/C) or idle set screw on A/C solenoid or kicker (vehicles with A/C). (Scheme 11)
4. Turn engine off and remove tachometer. Reconnect cooling fan connector. Remove jumper wire grounding carburetor switch. Reinstall PCV valve. Reconnect connector to CVSCC.

1.6L & 2.2L Carbureted Engine Curb Idle Speed Adjustment Locations. Scheme 11

1.6L & 2.2L CARBURETED MODELS CURB IDLE SPEED (RPM)

HOT (SLOW) IDLE RPM (2.6L)

1. Set parking brake and place transaxle in Neutral. Turn all lights and accessories off. Disconnect engine cooling fan. Connect tachometer to engine. Start engine and run at fast idle until normal operating temperature is reached.
2. Check and/or adjust timing as necessary. Open throttle and allow engine to run at 2500 RPM for 10 seconds. Return engine to idle. Wait 2 minutes and read engine RPM. If RPM is not as specified, turn adjusting screw until correct RPM is obtained. (Scheme 12) Remove idle switch connector on feedback models.
3. On air conditioned models, set temperature control lever to coldest position and turn on A/C. With compressor running, set engine speed to 900 RPM by turning idle-up screw. (Scheme 13)
4. Turn off engine. Reconnect fan, disconnect tachometer, and plug in idle switch connector.

2.6L Curb Idle Speed Adjusting Screw Location. Scheme 12

2.6L Idle-Up and Fast Idle Adjusting Screw Location. Scheme 13

2.6L CURB IDLE SPEED

IDLE MIXTURE ADJUSTMENT

Note. No idle speed adjustment is available for the Fuel Injected Models

1.6L & 2.2L Carburetor Models (Propane Enrichment Procedure)

1. Set parking brake and place transaxle in Neutral. Turn all lights and accessories off. Connect tachometer to engine. Remove concealment plug. Start engine and warm to normal operating temperature. Be sure engine is at curb idle.
2. Disconnect and plug vacuum connector at CVSCC. Disconnect vacuum hose from heated air door at 3-way connector. Install in its place a supply hose from a propane bottle. Make sure the valves are closed, the bottle is upright, and in a safe place.
3. Disconnect connector at cooling fan and install a jumper wire so that fan will run continuously. Remove PCV valve from valve cover so that valve can draw fresh air.
4. Connect a jumper wire between carburetor switch and ground. Disconnect test connector on left fender shield.
5. Open main valve on propane bottle. With air cleaner installed, slowly open propane metering valve until maximum engine RPM is reached. Carefully adjust metering valve to obtain a steady maximum RPM. If too much propane is added, the engine speed will drop.
6. While propane is flowing, adjust idle speed screw on top of solenoid to specified RPM. Fine tune propane metering valve and idle adjustment screw to specified RPM.
7. Turn main valve off and allow engine speed to stabilize. With air cleaner in place, adjust idle to specified RPM using mixture adjusting screw. Allow engine to stabilize between adjustments.
8. Turn main valve back on and note maximum RPM reading. If propane enriched RPM is not within 25 RPM of specified RPM, repeat steps 5) through 8) until proper propane idle RPM is obtained.
9. Turn both propane bottle valves off. Remove test equipment and jumper wires. Reconnect vacuum lines and install new concealment plug.

PROPANE ASSISTED IDLE SPEED SPECIFICATIONS

2.6L Idle Check Procedure (Propane Enrichment Procedure)

1. Place transaxle in Neutral. Turn all lights and accessories off. Connect tachometer to engine. Start engine and warm to normal operating temperature. Ensure engine timing is correct.
2. Shut off engine, detach negative battery cable for 3 seconds, then reconnect. Disconnect O2 sensor from engine harness lead. CAUTION: Ensure no pulling force is placed on sensor wire. Unplug at connector 4 in. from sensor. Be careful around sensor for exhaust manifold is extremely hot.
3. Start engine, allow to operate between 2000 and 3000 RPM for 10 seconds. Return to idle. Disconnect radiator fan. Let engine idle for 2 minutes. Detach air duct from air cleaner. Place supply hose of propane 4 inches into air cleaner. Be sure propane bottle is upright, in a safe place, and both valves are fully closed.
4. Open main valve of propane. Slowly open metering valve of propane until highest engine RPM is reached. Engine will decrease speed if too much propane is added. Fine tune for highest RPM. Engine RPM should increase 40-90 RPM.
5. If RPM increase is not correct, go to Idle Set Procedure. If RPM increase is correct, turn off both propane valves. Remove propane supply hose and reinstall fresh air duct. Connect O2 sensor wire and radiator fan. Remove tachometer.

2.6L Idle Set Procedure

1. Remove concealment plug. Reconnect cooling fan. Start engine and warm to normal operating temperature. Shut off engine, detach negative battery cable for 3 seconds, then reconnect. Start engine. Open throttle and allow engine 2500 RPM for 10 seconds. Return engine to idle.
2. Remove idle switch connector from idle speed adjustment screw. Allow engine to idle for 2 minutes. Insert propane supply hose from propane bottle into air cleaner snorkel approximately 4". Ensure both valves are fully closed and bottle is upright.
3. Open propane valve until maximum engine RPM is reached. When too much propane is added, engine speed will decrease. Adjust propane metering valve to get highest engine RPM.
4. If maximum RPM changed, readjust engine speed to specified propane RPM. Turn off propane and allow engine speed to stabilize. Slowly adjust mixture screw to achieve specified idle RPM. Pause between adjustments to allow engine speed to stabilize.
5. Turn on propane valve. Adjust metering valve to get highest RPM. If maximum engine speed is more than 25 RPM different than specified propane RPM, repeat steps 3) through 5).
6. Turn both valves of propane off. Remove propane hose and reinstall air duct. Connect O2 sensor to engine harness lead. Install new concealment plug and impact plate. Connect idle switch connector.
7. If vehicle has air conditioning, set control to maximum cooling and turn on. Set engine speed to 900 RPM when compressor is running, by adjusting idle-up screw. (Scheme 13)

Scheme 14

1. Ensure timing is correct. Disconnect connector from radiator cooling fan and connect a jumper wire to fan so that it will run continuously. Remove PCV valve from valve cover and allow it to draw fresh air.
2. Disconnect and plug vacuum connector at CVSCC. Connect tachometer to engine. Using a jumper wire, ground carburetor switch.
3. If equipped, disconnect O2 system test connector on left fender shield near shock tower.
4. Start engine and warm to normal operating temperature. Open throttle and place fast idle adjusting screw on lowest step of fast idle cam. (Scheme 14) (Scheme 14): 1.6L & 2.2L Fast Idle Speed Adjusting Screw Location
5. Adjust fast idle speed using fast idle adjusting screw. Turn engine off and remove tachometer. Unplug and reconnect vacuum connector. Remove jumper wires and reconnect all connectors.

Scheme 15

1. Ensure timing is correct. Set parking brake and put transaxle in Neutral. Shut off lights and accessories. Disconnect radiator fan. Install tachometer to engine.
2. Run engine until operating temperature is reached. Disconnect and plug vacuum advance line.
3. With throttle open slightly, install spacing tool (C-4812) on choke cam follower pin. (Scheme 15) Lift throttle lever and adjust speed to specification. (Scheme 14) (Scheme 15): 2.6L Spacing Tool (C-4812 2C) in Position
4. Remove tool and tachometer. Stop engine, reconnect fan, unplug and reconnect vacuum advance hose.

FAST IDLE SPEED (RPM)

Scheme 16

1. Remove air cleaner crossover. Remove canister purge and air pump diverter valve vacuum hoses from carburetor. Locate and center punch a mark 1/4" from end of mixture screw housing. Punch mark should be at 10 o'clock position. (Scheme 16) (Scheme 16): 1.6L & 2.2L Mixture Screw Plug Removal
2. Drill through outer section of housing using a 3/16" drill bit. Concealment plug should drop out. If not, use a small drift punch to remove plug. CAUTION: DO NOT allow drift to contact mixture screw.
3. Reinstall vacuum hoses and air cleaner crossover. Perform propane idle mixture adjustment and reinstall plug.

2.6L

1. Remove impact plate, if equipped. Remove vacuum connector from high altitude compensator (HAC) fitting on carburetor, if equipped.
2. Drill out concealment plug using an 8" long, 1/4" drill bit. (Scheme 17)

2.6L Mikuni Mixture Screw Plug Removal Drill hole through carburetor base at 45 degree angle behind plug. Scheme 17