If I can remember back the Bosch K type is a mechanical continuous injection system CIS
Your fuel pressure should be 77-80 psi, what is the fuel pressure now?
Also check the cold start injector spray pattern
This injectiion system has fuel accumulator/mixture control unit you might want to check this components out. I don't have a schematic diagram on this type of injection in the Mit1 auto references. I'm very sorry this is as far as I can take you
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NOTE:For fuel system pressure testing, refer to the appropriate BASIC TESTING article.
AFTER-START ENRICHMENT TEST
Connect meter adapter cable to differential pressure regulator. Set multimeter to mA scale. Unplug O2 sensor under right front floor mat. Current reading at operating temperature should be 7-9 mA. If reading is not correct, test coolant temperature sensor as previously described. If reading is correct, go to next step.
Disconnect Green wire of ignition switching unit (located on firewall) or install Protective Plug (102 589 02 21 00) into diagnostic socket. Simulate coolant temperature of 68 F (20 C) by connecting 2500-ohm resistor wire between coolant temperature sensor lead and ground. Crank engine for about 3 seconds and let key return to ON position. DO NOT turn ignition off.
After 4 seconds (including 3 seconds of cranking), current reading should increase to 24 mA. After 20 seconds, current reading should drop to 9-14 mA, which is basic warm-up current value. If readings are correct, test is complete. If readings are not correct, go to next step.
Connect voltmeter between ECU connector terminal No. 24 and ground. Crank starter motor. Cranking voltage signal (terminal No. 50) should be 10 volts. If canking voltage signal is not 10 volts, check and repair wiring. If voltage is correct, go to next step.
Check wiring between ECU connector and differential pressure regulator connector. See WIRING DIAGRAM article for wiring color and terminal numbers. If resistance reading is zero ohms, circuit is good and ECU should be replaced. If reading indicates open circuit, repair wiring
Monday, February 2nd, 2009 AT 8:36 PM