90 Quattro 20V L5-2309cc 2.3L DOHC (7A) (1990)
EGR Temperature Sensor: Locations
MPI Under Hood Component Layout (after March 1990)
Numbers in diagram refer to the components listed below.
1.
AIR MASS SENSOR: Located between the air filter housing and the air duct to the intake manifold.
2.
CARBON CANISTER SHUT-OFF VALVE: Located just in front of the engine coolant reservoir.
3.
CARBON CANISTER FREQUENCY VALVE: Located in front of the engine coolant reservoir, just in front of the carbon canister shut-off valve.
4.
CONNECTOR BRACKET FOR ENGINE SENSORS: Located on the left side of the fire wall in the engine compartment.
5.
COOLANT TEMPERATURE SENSOR: Located on the rear of the cylinder head, right side.
6.
CRANKSHAFT POSITION (REFERENCE) SENSOR: Located on the left rear of the engine block where the engine and transmission join.
7.
ENGINE SPEED SENSOR: Located on the left rear of the engine block where the engine and transmission join, next to the reference sensor.
8.
FUEL INJECTORS: Located on the left side of the cyl. head, installed in the intake manifold runners nearest the cylinder head.
9.
FUEL PUMP RELAY: Located in position #10 of the fuse/relay panel (left side of the plenum just in front of the windshield).
10.
IDLE STABILIZER VALVE: Located on the intake air duct between the air mass sensor and throttle valve assembly.
11.
IGNITION COIL WITH POWER OUTPUT STAGE: Located on the center of the fire wall, directly behind the engine.
12.
IGNITION DISTRIBUTOR WITH HALL SENSOR: Located on the rear of the cylinder head, left side,
13.
KNOCK SENSOR #1: Located on the left side of the engine block, between cyls. #1 & #2.
14.
KNOCK SENSOR #2: Located on the left side of the engine block, nearest cyl. #4.
15.
MPI ELECTRONIC CONTROL UNIT (ECU): Located in the passenger compartment, above the right side footwell, behind the A/C evaporator.
16.
SERIES RESISTOR PACK: Located in the left side of the plenum, just in front of the windshield, next to the fuse relay panel.