On modern Audi cars, ignition control is fully automatic and does not require owner intervention. The electronic engine control unit itself, responsible for ignition control, is checked at the station during maintenance using special computerized stands. But on Audi 80, Audi 100 cars, the adjustment is quite available for doing on your own.
Necessary
- - stroboscope;
- - a special tool for adjusting the ignition timing (for 7A engine);
- - spark plug wrench (for 7A engine).
Instructions
Step 1
To adjust the ignition on KV engines and engines with a volume of 1, 6 and 1, 8 liters, warm up the power unit to operating temperature. Mute it and connect the device. On DZ, PM and JN engine models, disconnect the vacuum hose from the distributor and plug it. Leave the hose connected on all other engine models.
Step 2
Start the engine at idle speed and aim the stroboscope at the hole on the left side of the clutch cover. If a slot on the flywheel appears at the bottom edge of this hole, then the ignition timing is normal. If its correction is necessary, remove the plug from the distributor clamping bolt, loosen this bolt and turn the distributor to the desired angle of installation. Reinstall all removed parts, connect the vacuum hose, stop the engine and remove the stroboscope.
Step 3
Adjust the ignition timing on PS and NG engines as follows: warm up the engine, turn it off, connect a stroboscope. Using the self-diagnosis system, make sure that the knock sensor is in good working order. If there is an air conditioner, turn it off. On the PS engine, check that the idle throttle switch is activated. On the NG engine, remove the fuse box cover and install the fuse in the petrol pump relay contacts. Start the engine at idle speed. Wait 4 seconds. before checking. To check and adjust the angle of operation, follow the steps similar to those described in paragraph 3.
Step 4
On the 7A engine, adjust the ignition timing according to the following sequence: set the engine to top dead center. To do this, remove the spark plugs and turn the crankshaft to the beginning of the compression moment in cylinder 1. To feel this moment, insert a rubber stopper or your own finger into hole 1 of the cylinder. Observing through the inspection hole located in the transmission housing, continue to turn the crankshaft clockwise until the markings on the flywheel and flywheel housing match.
Step 5
Next, remove the upper camshaft drive cover and make sure that the TDC marks on the camshaft sprocket and on the valve cover match. Remove the breaker-distributor cover and align the center of the slider with the TDC mark on this tool with a special tool. Check the Hall sensor with the bottom mark. This mark should line up with the slider. To correct its position, remove the plug and loosen the distributor clamping bolt. Turn its body until the pointer and the distributor slider are aligned. After all corrections and adjustments, reinstall all the removed parts.
Step 6
To properly remove the spark plugs on the 7A engine, first mark the location of the high-voltage wires according to the cylinder numbers (if there are no factory labels). Pull the spark plug clamps towards you. Using a candle wrench, unscrew the candles and remove them. Check and adjust, if necessary, spark plug gap per manufacturer's specifications. Use a feeler gauge to measure the gap, and bend the outer electrode to the desired state to correct the gap. Hand-tighten the plugs to the torque specified in the specifications.
